Consulta: subjectFacets:"GIS"
Registros recuperados: 128
Data/hora: 13/06/2024 07:07:28

Mapeamento do conflito de uso em áreas de preservação permanente na microbacia Santa Cruz, município de Porto Nacional – Tocantins – Brasil
Provedor de dados: 25
Autores: Barros, Emmanuel Kirlian Evangelista; Martins, Alan Kardec Elias; Bonatto, Frederico; Faria, Viviane Machado Lettry de.
The present work had as objective to use techniques of systems of geographic information and remote sensing to mapear the use and covering of the land in the basin Santa Cruz located in the city of Porto Nacional-TO, qualitying and quantitying the level of degradation in areas of permanent preservation of the edges of the water courses having for base the limits established for the forest code and the Resolution nº 303 of the CONAMA. The results had pointed efficiency of the used tools and although the existence of conflicts of use in areas of permanent preservation the basin discovers conserved well.
Tipo: Article
Palavras-chave: Remote sensing; Bacia; SIG; Sensoriamento remoto; GIS; Basin.
Ano: 2007
URL: http://hdl.handle.net/2315/94

Erosion due to rural roads: a case study in the Una River Basin, Taubaté, SP, Brazil
Provedor de dados: 25
Autores: Batista, Getulio Teixeira; Catelani, Celso de Souza; Targa, Marcelo dos Santos; Dias, Nelson Wellausen.
Aceito para apresentação como poster, no IWA World Water Congress, Vienna, 7-12 set 2008. (reference number:666237).
Tipo: Article
Palavras-chave: River sedimentation; GIS; Roads; Erosion.
Ano: 2008
URL: http://hdl.handle.net/2315/142

Diversidad y distribución del género Salpichroa (Solanaceae), con énfasis en los Andes peruanos
Provedor de dados: 66
Autores: Gonzáles,Paúl; Basso,Ana V; Särkinen,Tiina; González,Segundo Leiva; Cano,Asunción; Barboza,Gloria E.
El presente estudio brinda información sobre la diversidad y los patrones de distribución de las especies de Salpichroa a lo largo de los Andes. De un total de 1205 colecciones de herbario estudiadas, 855 fueron georreferenciadas y analizadas, de éstas, el 99 % provienen de Perú, Ecuador y Argentina. Se reconocen 22 especies de Salpichroa, de las cuales 19 se encuentran en el Perú, el país con mayor número de especies de ese género; le siguen Bolivia (8), Ecuador (5), Argentina (4), Chile (3), Colombia (2), Venezuela (2), Uruguay (1), Paraguay (1) y Brasil (1). En general, Salpichroa se distribuye entre 30° S y 37° S, con la mayor riqueza de especies entre 7° S y 17° S, en el Perú. En Perú, la mayor concentración de especies se encuentra en el departamento...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Altos Andes; Especies endémicas; Diversidad de especies; Fitogeografía; GIS; Sudamérica.
Ano: 2018
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932018000100002

Potencial para producir Jatropha curcas L. como materia prima para biodiésel en el estado de Veracruz.
Provedor de dados: 32
Autores: Inurreta Aguirre, Héctor Daniel.
Existe gran interés alrededor del mundo en utilizar el aceite de Jatropha curcas L. como materia prima para biodiésel; sin embargo, con el fin de aumentar la eficiencia energética y económica de su cultivo, es necesario identificar áreas con condiciones agroecológicas óptimas y estimar su productividad en zonas marginales para evitar competencia con la producción de alimentos. El objetivo de este trabajo fue conocer la variación del potencial productivo de Jatropha curcas L. en respuesta a las distintas condiciones edafoclimáticas del estado de Veracruz. Se utilizó el modelo Soil and Water Assessment Tool (SWAT) para simular el rendimiento de semilla de Jatropha curcas L. Las unidades de cálculo fueron las Unidades de Respuesta Hidrológica (URH), definidas...
Palavras-chave: SWAT; Modelos de simulación; Zonificación; SIG; Simulation models; Zoning; GIS; Agroecosistemas locales; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/1700

Prevalencia e identificación de nematodos gastroentéricos y coccidias en rebaños caprinos del estado de Puebla.
Provedor de dados: 32
Autores: Lagunes Rivera, Sergio Alberto.
La caprinocultura se desarrolla en el 73% de los municipios del estado de Puebla, a altitudes de 900 a 3,000 msnm, donde las condiciones ambientales pueden influir en la presencia de parasitosis. El objetivo del estudio fue determinar la prevalencia de parásitos gastrointestinales e identificar los géneros de nematodos que afectan a los caprinos, en función de tres estratos fisiológicos de los animales y de tres zonas climáticas. El muestreo se realizó en 49 rebaños ubicados en municipios con importancia caprina, los cuales se agruparon en tres zonas en función de su altitud, temperatura y precipitación. En cada rebaño se muestrearon tres estratos de animales: hembras primalas, adultas y sementales, colectando respectivamente, 236, 262 y 50 muestras de 20...
Palavras-chave: Haemonchus; Parásitos; Pequeños rumiantes; SIG; GIS; Parasites; Small ruminants; Estrategias para el Desarrollo Agrícola Regional; EDAR; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2354

Sistemas agrícolas y aprovechamiento de los recursos naturales entre los Itzaes de San Andrés y San José, Petén, Guatemala.
Provedor de dados: 32
Autores: Lara Ponce, Estuardo.
Se efectuó un estudio etnoecológico comparativo entre los maya itzá de San Andrés y San José en la región del Petén central, Guatemala, para analizar los sistemas agrícolas que se manejan al igual que los recursos naturales que se utilizan. El área fue caracterizada mediante el análisis espacial en SIG, con lo que se obtuvo un modelo de elevación y mapas temáticos, los cuales mostraron la existencia de complejos subsistemas abióticos, bióticos, socioeconómicos-culturales que se interrelaccionan y que influyen en el cambio de uso del suelo. Con base en el conocimiento local y la aplicación de un diagnóstico agrícola se elaboró un Etnomapa, en esta obra se detallan múltiples elementos de los recursos naturales y sociales. Se aplicaron encuestas para...
Palavras-chave: Mayas itzaes; Petén; Agrosistemas; Recursos naturales; SIG; Itza maya; Agrosystems; Natural resources; GIS; Doctorado; Estrategias para el Desarrollo Agrícola Regional; EDAR.
Ano: 2010
URL: http://hdl.handle.net/10521/208

El uso de tecnologías de la información en el desarrollo de un plan de manejo sustentable del acuífero del Valle de Guadalupe, B. C.
Provedor de dados: 32
Autores: Salgado Tránsito, Jorge Arturo.
El presente trabajo se realizó en la región del Valle de Guadalupe, municipio de Ensenada, Baja California, y consistió en la elaboración de un Plan de manejo sustentable del acuífero a partir del uso de tecnologías de la información. El plan de manejo servirá para equilibrar las extracciones con las recargas del acuífero del Valle de Guadalupe. La metodología llevada a cabo en la investigación partió de la elaboración del Sistema de Información Geográfica de la zona. Posteriormente se realizó una estimación de la descarga del acuífero mediante el censo de las extracciones observadas en campo, así como los gastos reportados para el uso urbano. Con la información obtenida y datos de las estaciones meteorológicas de influencia se determinó el balance general...
Palavras-chave: Sistemas de Información Geográfica; Balance hídrico; Análisis químico; Desalinización; GIS; Water balance; Chemical analysis; Desalination; Doctorado; Hidrociencias.
Ano: 2010
URL: http://hdl.handle.net/10521/321

Análisis de la información de infraestructura hidroagrícola en distritos de riego.
Provedor de dados: 32
Autores: Tovar Tapia, Víctor Gregorio.
México ocupa el sexto lugar mundial en términos de superficie con infraestructura de riego con 6.46 millones de hectáreas, de las cuales el 54% corresponde a 85 Distritos de Riego (DR), y el restante a más de 39 mil Unidades de Riego (UR).Por lo anterior surge la inquietud de cuantificar con exactitud la infraestructura para su control, mantenimiento y actualización, ya que en la actualidad en algunos casos la información con la que cuenta la Comisión Nacional del Agua (CONAGUA)posiblemente no ha sido actualizada oportunamente. El objetivo del presente análisis es comparar la información sobre infraestructura agrícola que existe en forma oficial y la obtenida a través de sistemas de información geográfica (SIG) con que cuenta la misma CONAGUA y evaluar la...
Palavras-chave: Canales; Drenes; Estructuras hidroagrícolas; SIG; Superficie agrícola; Channels; Drains; Hydro structures; GIS; Agricultural area; Hidrociencias; Maestría Tecnológica.
Ano: 2013
URL: http://hdl.handle.net/10521/2069

Análisis multitemporal de la dinámica en el cambio de uso del suelo rural-urbano en la región de Atlixco, Puebla.
Provedor de dados: 32
Autores: Luna Fernández, Víctor Genaro.
La presente investigación se llevó a cabo en la región de Atlixco, Puebla, en las comunidades de San Pedro Benito Juárez y Nexatengo. Tuvo como objetivo conocer la dinámica en el cambio de uso del suelo en la región de Atlixco durante el periodo de 1977 al 2007 y la relación que existe en función de los factores sociales, económicos, agrícolas y ambientales. La importancia de estudiar estas relaciones desde un enfoque sistémico radica en tratar de comprender el funcionamiento de la sociedad desde una perspectiva holística e integradora, en donde lo importante son las relaciones entre los componentes, desde el punto de interés del todo y no solo el de las partes que son inherentes al problema. Debido a que el problema analizado se encuentra dentro de un...
Palavras-chave: Análisis Multitemporal; Cambio de uso del suelo; Imágenes de satélite; Rural-urbano; SIG's; GIS; Land use; Multi-temporal analysis; Rural-urban; Satellite imagery; EDAR; Estrategias para el Desarrollo Agrícola Regional; Doctorado.
Ano: 2011
URL: http://hdl.handle.net/10521/651

Cambio climático y distribución potencial del bosque mesófilo de montaña en el Centro de México.
Provedor de dados: 32
Autores: Cruz Leyva, Isidro Amhed.
Se modeló la distribución potencial del bosque mesófilo de montaña (BMM) para los estados de Hidalgo, Puebla y Veracruz, México bajo el escenario A2 de cambio climático (2050 y 2080) con los modelos de circulación general (GCM) CCSM3 y ECHAM5. Se utilizaron técnicas de modelado de hábitat (MH), modelado de nicho (MN) y especies arbóreas estructuralmente importantes y restringidas al BMM. Para caracterizar las condiciones ambientales, se integró un Sistema de información Geográfica (SIG) de 5 variables ambientales, 5 variables de distancia euclidiana y 19 variables bioclimáticas. De la Red Mundial de Información sobre Biodiversidad (REMIB) se obtuvieron 872 registros únicos de 12 especies arbóreas del BMM. Con datos de REMIB y del SIG se ajustaron los MN...
Palavras-chave: BMM; A2; GCM; CCSM3; ECHAM5; MH; MN; SIG; REMIB; CUT; ML; HM; NM; GIS; GINB; LUC; LM; Forestal; Doctorado.
Ano: 2014
URL: http://hdl.handle.net/10521/2247

Análisis de las unidades de riego con aprovechamiento superficial en la Cuenca Lerma Chapala, México.
Provedor de dados: 32
Autores: González Covarrubias, Galdino Daniel.
En el presente estudio se realizó el análisis de las Unidades de Riego con aprovechamiento superficial en la Cuenca Lerma Chapala, México, a través de la georrefenciación y caracterización de la infraestructura hidroagrícola, padrón de usuarios y catastro, integrándolos en un Modelo de Sistema de Información Geográfica (SIG). Esto permitió conocer en forma precisa la información relevante de dichas Unidades. Se caracterizaron 1,364 unidades de riego con un total de 56,266 usuarios que detentan 114,975.26 hectáreas. La longitud de la red de conducción es de 2,435 km y la longitud de la red de drenaje es de 2,643 km, y 34,965 estructuras de control.  La integración de las capas de información generadas en formato shape-file (*.shp) al Modelo de SIG de la...
Palavras-chave: Modelación; SIG; Riego; Agua; Sustentabilidad; Cuenca; Modeling; GIS; Irrigation; Water; Sustainability; Watershed; Hidrociencias; Maestría Tecnológica.
Ano: 2013
URL: http://hdl.handle.net/10521/2072

Identificación de corredores biológicos potenciales para el jaguar (Panthera Onca) en Sierra Abra Tanchipa, San Luis Potosí y sus límites estatales.
Provedor de dados: 32
Autores: Dueñas López, Gmelina.
Los jaguares (Panthera onca) debido a sus amplios ámbitos hogareños son susceptibles a los efectos de la fragmentación. Para disminuir tales efectos, los corredores biológicos han sido propuestos como una herramienta para conectar poblaciones aisladas. La Sierra Madre Oriental (SMO) es una unidad de conservación para los jaguares que se considera con baja probabilidad de sostener poblaciones. Se identificaron corredores biológicos potenciales para el jaguar dentro de la SMO,  por medio de técnicas de reconocimiento espacial. Mediante el algoritmo Maxent se identificaron parches de hábitat potencial, y a partir del Proceso Jerárquico Analítico y la Combinación Lineal Ponderada se generó  una matriz de resistencia. El modelo con los corredores potencialmente...
Palavras-chave: Dispersión; SIG; Rutas de menor costo; Stepping-stone; Dispersion; GIS; Least cost path; Ganadería; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2030

Distribución geográfica y ecológica del jaguarundi (Puma yagouaroundi) en el estado de San Luis Potosí, México.
Provedor de dados: 32
Autores: Coronado Quibrera, Wendy Paola.
Puma yagouaroundi es una especie no estudiada en San Luis Potosí. En este estudio se obtuvieron nuevos registros, se describió el hábitat y se crearon las bases para  un modelo de distribución potencial. El muestreo se llevó a cabo de octubre 2008- mayo 2009 mediante entrevistas en 96 comunidades rurales de la Zona Media, Centro y Huasteca. La información se agrupó en tres clases usando un criterio analítico de veracidad. Los lugares donde hubo avistamientos se visitaron y se tomaron los datos del hábitat. Se obtuvieron 58 registros de presencia y 34 de ausencia. Los pastizales (24%), zonas de cultivo (21%), y selvas (19%) fueron los tipos de vegetación más frecuentes en los sitios de avistamiento. Las selvas (46%) y pastizales (22%) como vegetación...
Palavras-chave: Distribución; Hábitat; Presencia-ausencia; Cobertura de acecho; SIG; PAJ; Distribution; Habitat; Presence-absence; Ambush cover; GIS; AHP; Maestría; Ganadería.
Ano: 2011
URL: http://hdl.handle.net/10521/418

Modelado especial de los recursos forestales en el ejido de Atopixco, estado de Hidalgo
Provedor de dados: 32
Autores: Cruz Leyva, Isidro Ahmed.
En este trabajo se modeló el LAI5 (m/m), el LAIAL (m/m), y la COB utilizando variables cartográficas y espectrales. Se observó que la COB se relaciona con la Precipitación Media en Secas (PMANA) y su cuadrado (PMANA2), Precipitación Media Anual en Lluvias (PMAMO), Temperatura Máxima (TMAX) y su cuadrado (TMAX2), y la Banda 4 (B4) (P &lt; 0.001, R2 = 0.66). El LAI5 se relaciona con la Precipitación Media en Secas (PMANA) y su cuadrado (PMANA2), Precipitación Media Anual en Lluvias (PMAMO), Temperatura Máxima (TMAX) y su cuadrado (TMAX2), y la Banda 4 (B4) (P &lt; 0.001, R2 = 0.71). El LAIAL se relaciona con Precipitación Media en Lluvias (PMAMO) y su cuadrado (PMAMO2), Precipitación Media Anual en Secas (PMANA), Temperatura Máxima (TMAX) y su cuadrado...
Tipo: Tesis
Palavras-chave: Modelado Espacial; Variables Cartográficas; Variables Espectrales; SIG; Variables Biofísicas; Inventario Forestal.; Maestría; Forestal; Spatial modelling; GIS variables; Spectral variables; GIS; Biophysical variables; Forest inventory.
Ano: 2008
URL: http://hdl.handle.net/10521/1220

Desarrollo de un modelo nacional de Sistema de Información Geográfica de Distritos de Riego en México.
Provedor de dados: 32
Autores: Hernández Rodríguez, Adrián.
Se presentan las bases conceptuales, metodológicas, trabajo de campo y resultados obtenidos en el Desarrollo de un Modelo Nacional de Sistema de Información Geográfica (SIG) de los Distritos de Riego de México. Dicho  Modelo se construyó a partir de un Mapa Base Nacional utilizando el Modelo de Elevación Digital del Instituto Nacional de Estadística, Geografía e Informática y un continuo nacional de imágenes satelitales tipo LANDSAT. El Modelo Nacional desarrollado incluye los Modelos de SIG de cada uno de los 85 Distritos de Riego, que se realizaron a partir de un continuo de imágenes satelitales de alta resolución tipo SPOT. Mediante recorridos de campo se obtuvo información directa para cada Distrito de Riego, la cual fue integrada en once capas de...
Palavras-chave: Modelo Nacional; SIG; Distrito de Riego; Análisis; Manejo; GIS; National Model; Irrigation; Planning; Analysis; Management; Hidrociencias; Maestría Tecnológica.
Ano: 2013
URL: http://hdl.handle.net/10521/2063

Modelado especial de los recursos forestales en el ejido de Atopixco, estado de Hidalgo
Provedor de dados: 32
Autores: Cruz Leyva, Isidro Ahmed.
En este trabajo se modeló el LAI5 (m/m), el LAIAL (m/m), y la COB utilizando variables cartográficas y espectrales. Se observó que la COB se relaciona con la Precipitación Media en Secas (PMANA) y su cuadrado (PMANA2), Precipitación Media Anual en Lluvias (PMAMO), Temperatura Máxima (TMAX) y su cuadrado (TMAX2), y la Banda 4 (B4) (P &lt; 0.001, R2 = 0.66). El LAI5 se relaciona con la Precipitación Media en Secas (PMANA) y su cuadrado (PMANA2), Precipitación Media Anual en Lluvias (PMAMO), Temperatura Máxima (TMAX) y su cuadrado (TMAX2), y la Banda 4 (B4) (P &lt; 0.001, R2 = 0.71). El LAIAL se relaciona con Precipitación Media en Lluvias (PMAMO) y su cuadrado (PMAMO2), Precipitación Media Anual en Secas (PMANA), Temperatura Máxima (TMAX) y su cuadrado...
Palavras-chave: Modelado Espacial; Variables Cartográficas; Variables Espectrales; SIG; Variables Biofísicas; Inventario Forestal. Spatial modelling; GIS variables; Spectral variables; GIS; Biophysical variables; Forest inventory.
Ano: 2012
URL: http://hdl.handle.net/10521/923

Percepción y manejo de los recursos naturales en la comunidad lacandona de Nahá, Chiapas.
Provedor de dados: 32
Autores: Contreras Cortés, Leonardo Ernesto Ulises.
Se realizó un estudio etnoecológico con los mayas-lacandones de la comunidad de Nahá, en el cual se analizaron los agrosistemas y territorios (Unidades de Paisaje Lacandón) donde aprovechan distintos tipos de recursos naturales. Para los agrosistemas se aplicaron un total de 56 cuestionarios a hombres, en su mayoría jefes de familia, reconocidos por la asamblea y que legítimamente pueden hacer uso de las tierras que hay en la comunidad. Nahá se ubica en una zona intertropical y su altitud varía 500 metros, se hizo un análisis espacial por medio de Sistema de Información Geográfica (SIG), lo que permitió la elaboración de mapas temáticos, lo cual mostró la complejidad del uso de distintos espacios, en donde se relacionan lo biológico, lo social y lo...
Palavras-chave: Manejo; Mayas lacandones; Nahá; Percepción; Recursos naturales; SIG; GIS; Management; Mayan lacandon; Naha; Natural resources; Perception; EDAR; Estrategias para el Desarrollo Agrícola Regional; Doctorado.
Ano: 2011
URL: http://hdl.handle.net/10521/614

Estudio multiescalar del recurso hídrico como factor de cambio en distritos del noreste de Tamaulipas
Provedor de dados: 32
Autores: Gutiérrez Castorena, Edgar Vladimir.
A partir de 1994, la Tercera Unidad de Asistencia Técnica del Distrito de Riego No. 026,  región noreste del estado de Tamaulipas, fue modificado por un déficit de humedad colocando a  la región en una situación de alta vulnerabilidad social, económica, política, cultural y  agroecológica. Debido a la complejidad del problema se llevó a cabo una investigación  multiescalar desde, el nivel mega-macro hasta el microscópico empleando diferentes  metodologías: interpretación de imágenes de satélite, uso de sistemas de información geográfica,  creación de bases de datos (90,500 piezas), encuestas directas con productores, análisis físicos,  químicos, mineralógicos y micromorfológicos de suelos. Los objetivos que se plantearon fueron:  1) Evaluar el uso de la...
Tipo: Tesis
Palavras-chave: Patrón de cultivo; Maíz; Sorgo; SIG; Cambio de uso de suelo; Clasificación de Suelos; Suelos semi-áridos; Déficit de agua; Percepción remota; Doctorado; Edafología; Maize; Sorghum; GIS; Land use change; Environment adaptation; Crop patterns; Irrigation Districts; Remote sensing.
Ano: 2009
URL: http://hdl.handle.net/10521/1284

Sistemas agrícolas y aprovechamiento de los recursos naturales entre los Itzaes de San Andrés y San José, Petén, Guatemala.
Provedor de dados: 32
Autores: Lara Ponce, Estuardo.
Se efectuó un estudio etnoecológico comparativo entre los maya itzá de San Andrés y San José en la región del Petén central, Guatemala, para analizar los sistemas agrícolas que se manejan al igual que los recursos naturales que se utilizan. El área fue caracterizada mediante el análisis espacial en SIG, con lo que se obtuvo un modelo de elevación y mapas temáticos, los cuales mostraron la existencia de complejos subsistemas abióticos, bióticos, socioeconómicos-culturales que se interrelaccionan y que influyen en el cambio de uso del suelo. Con base en el conocimiento local y la aplicación de un diagnóstico agrícola se elaboró un Etnomapa, en esta obra se detallan múltiples elementos de los recursos naturales y sociales. Se aplicaron encuestas para...
Palavras-chave: Mayas itzaes; Petén; Agrosistemas; Recursos naturales; SIG; Itza maya; Agrosystems; Natural resources; GIS; Doctorado; Estrategias para el Desarrollo Agrícola Regional; EDAR.
Ano: 2010
URL: http://hdl.handle.net/10521/208

Modelado especial de los recursos forestales en el ejido de Atopixco, estado de Hidalgo
Provedor de dados: 32
Autores: Cruz Leyva, Isidro Ahmed.
En este trabajo se modeló el LAI5 (m/m), el LAIAL (m/m), y la COB utilizando variables cartográficas y espectrales. Se observó que la COB se relaciona con la Precipitación Media en Secas (PMANA) y su cuadrado (PMANA2), Precipitación Media Anual en Lluvias (PMAMO), Temperatura Máxima (TMAX) y su cuadrado (TMAX2), y la Banda 4 (B4) (P &lt; 0.001, R2 = 0.66). El LAI5 se relaciona con la Precipitación Media en Secas (PMANA) y su cuadrado (PMANA2), Precipitación Media Anual en Lluvias (PMAMO), Temperatura Máxima (TMAX) y su cuadrado (TMAX2), y la Banda 4 (B4) (P &lt; 0.001, R2 = 0.71). El LAIAL se relaciona con Precipitación Media en Lluvias (PMAMO) y su cuadrado (PMAMO2), Precipitación Media Anual en Secas (PMANA), Temperatura Máxima (TMAX) y su cuadrado...
Palavras-chave: Modelado Espacial; Variables Cartográficas; Variables Espectrales; SIG; Variables Biofísicas; Inventario Forestal. Spatial modelling; GIS variables; Spectral variables; GIS; Biophysical variables; Forest inventory.
Ano: 2012
URL: http://hdl.handle.net/10521/871

Estudio de la evolución temporal y espacial del nivel estático del acuífero Valle del Mayo para el período 1997-2011.
Provedor de dados: 32
Autores: Luque Rodríguez, Rosa Imelda.
El monitoreo del nivel de las aguas subterráneas, provee de importante información para la caracterización del abatimiento, incremento o estabilización de los volúmenes del agua subterránea en una región. Los cambios en los niveles de agua subterránea son provocados por los patrones de consumo de agua, las afectaciones en la recarga y los factores climáticos; la identificación y cuantificación de estos cambios son indispensables para el manejo sustentable de este recurso. En este estudio se evaluó el comportamiento del nivel y la distribución de él agua subterránea en el área del distrito de riego 038 rio Mayo, Sonora, México, para el periodo del año 1997 a 2011; mediante la construcción e integración de mapas de isolineas del cambio y la distribución de...
Palavras-chave: Monitoreo de  nivel estático; SIG; Mapa de isolíneas; Acuífero; Static level monitoring; GIS; Maps of isolines; Aquifer; Hidrociencias; Maestría Tecnológica.
Ano: 2013
URL: http://hdl.handle.net/10521/1850

Distribución geográfica y ecológica del jaguarundi (Puma yagouaroundi) en el estado de San Luis Potosí, México.
Provedor de dados: 32
Autores: Coronado Quibrera, Wendy Paola.
Puma yagouaroundi es una especie no estudiada en San Luis Potosí. En este estudio se obtuvieron nuevos registros, se describió el hábitat y se crearon las bases para  un modelo de distribución potencial. El muestreo se llevó a cabo de octubre 2008- mayo 2009 mediante entrevistas en 96 comunidades rurales de la Zona Media, Centro y Huasteca. La información se agrupó en tres clases usando un criterio analítico de veracidad. Los lugares donde hubo avistamientos se visitaron y se tomaron los datos del hábitat. Se obtuvieron 58 registros de presencia y 34 de ausencia. Los pastizales (24%), zonas de cultivo (21%), y selvas (19%) fueron los tipos de vegetación más frecuentes en los sitios de avistamiento. Las selvas (46%) y pastizales (22%) como vegetación...
Palavras-chave: Distribución; Hábitat; Presencia-ausencia; Cobertura de acecho; SIG; PAJ; Distribution; Habitat; Presence-absence; Ambush cover; GIS; AHP; Maestría; Ganadería.
Ano: 2011
URL: http://hdl.handle.net/10521/418

Monitoring Impacts of Natural Resource Extraction on Lemurs of the Masoala Peninsula, Madagascar
Provedor de dados: 7
Autores: Merenlender, Adina; University of California, Berkeley; adina@nature.berkeley.edu; Kremen, Claire; Center for Conservation Biology and Wildlife Conservation Society; ckremen@leland.Stanford.EDU; Rakotondratsima, Marius; Wildlife Conservation Society, Madagascar; mphrl@ukc.ac.uk; Weiss, Andrew; Center for Conservation Biology; aweiss@bing.stanford.edu.
Monitoring the influence of human actions on flagship species is an important part of conserving biodiversity, because the information gained is crucial for the development and adaptation of conservation management plans. On the Masoala Peninsula in Madagascar, we are monitoring the two largest prosimian species, Eulemur fulvus albifrons and Varecia variegata rubra, at disturbed and undisturbed forest sites to determine if extraction of forest resources has a significant impact on the population viability of these species. To test the sensitivity of lemur species to routine extraction of natural resources by local villagers, we compared population demography and density for both species across six study sites, using a new census technique. Three of the...
Tipo: Peer-Reviewed Reports
Palavras-chave: Biodiversity; Buffer zone; Census techniques; Conservation; Eulemur fulvus albifrons; GIS; Lemurs; Madagascar; National park; Natural resource extraction; Primate; Protected area management; Varecia variegata rubra.
Ano: 1998

Expert and Generalist Local Knowledge about Land-cover Change on South Africa&amp;#8217;s Wild Coast: Can Local Ecological Knowledge Add Value to Science?
Provedor de dados: 7
Autores: Chalmers, Nigel; Rhodes University, South Africa;; Fabricius, Christo; Rhodes University, South Africa; c.fabricius@ru.ac.za.
Local ecological knowledge (LEK) can shed light on ecosystem change, especially in under-researched areas such as South Africa&amp;#8217;s Wild Coast. However, for ecosystem planning purposes, it is necessary to assess the accuracy and validity of LEK, and determine where such knowledge is situated in a community, and how evenly it is spread. Furthermore, it is relevant to ask: does LEK add value to science, and how do science and local knowledge complement one another? We assessed change in woodland and forest cover in the Nqabara Administrative Area on South Africa&amp;#8217;s Wild Coast between 1974 and 2001. The inhabitants of Nqabara are &amp;#8220;traditional&amp;#8221; Xhosa-speaking people who are highly dependent on natural resources for their...
Tipo: Peer-Reviewed Reports
Palavras-chave: Cultivation; Fire; GIS; Land-cover change; Landscape ecology; Local ecological knowledge; Politics; Scientific knowledge; Vegetation.
Ano: 2007

USDA Forest Service Roadless Areas: Potential Biodiversity Conservation Reserves
Provedor de dados: 7
Autores: Loucks, Colby; World Wildlife Fund; colby.loucks@wwfus.org; Brown, Nicholas; NatureServe; nick_brown@natureserve.org; Loucks, Andrea; Pinchot Institute; andreabedell@pinchot.org; Cesareo, Kerry; World Wildlife Fund; kerry.cesareo@wwfus.org.
In January 2001, approximately 23 x 106 ha of land in the U.S. National Forest System were slated to remain roadless and protected from timber extraction under the Final Roadless Conservation Rule. We examined the potential contributions of these areas to the conservation of biodiversity. Using GIS, we analyzed  the concordance of inventoried roadless areas (IRAs) with ecoregion-scale biological  importance and endangered and imperiled species distributions on a scale of 1:24,000.  We found that more than 25% of IRAs are located in globally or regionally outstanding ecoregions and that 77% of inventoried roadless areas have the potential to conserve threatened, endangered, or imperiled species. IRAs would increase the conservation reserve network...
Tipo: Peer-Reviewed Reports
Palavras-chave: GIS; USDA Forest Service; Biodiversity conservation; Endangered species; Grizzly bears; Imperiled species; Roadless areas; Threatened species.
Ano: 2003

National Parks and Protected Areas and the Role for Employment in Tourism and Forest Sectors: a Swedish Case
Provedor de dados: 7
Autores: Fredman, Peter; ETOUR; Mittuniversitetet; Peter.Fredman@etour.se; Sandell, Klas; Karlstad University; Stockholm University; klas.sandell@kau.se.
The development of national parks and other protected areas has been widely promoted because of its potential for regional development in peripheral and sparsely populated areas. The argument is that the economic and social benefits seen in national parks in the USA and UK will also occur in the Swedish context in the form of an increased tourism-related labor market. Our aim was to analyze the possibility of such a development both in light of the policy visions of positive regional and local development and from the adversary point of view that protection of land is making it more difficult for 15 sparsely populated mountain municipalities in Sweden to prosper. We used a database covering the entire population of the area for 1991 to 2001. Our results...
Tipo: Peer-Reviewed article
Palavras-chave: Employment; Forest sector; Forestry; GIS; Restructuring in peripheral areas; Tourism.
Ano: 2010

Spatial Dynamics of Sea Turtle Abundance and Shrimping Intensity in the U.S. Gulf of Mexico
Provedor de dados: 7
Autores: McDaniel, Carrie J; Duke University Marine Laboratory; cjmcdaniel@hotmail.com; Crowder, Larry B; Duke University Marine Laboratory; lcrowder@duke.edu; Priddy, Jeffery A; Duke University Marine Laboratory; jpriddy@duke.edu.
In order to examine the scientific feasibility of area closures for sea turtle protection, we determined the spatial dynamics of sea turtles for the U.S. Gulf of Mexico by analyzing National Marine Fisheries Service (NMFS) aerial survey data in September, October, and November of 1992, 1993, and 1994. Turtle sightings were grouped into depth zones and NMFS fishery statistical zones, and strip transect methods were used to estimate the relative abundance of sea turtles in each subzone. Average shrimping intensity was calculated for each subzone for all months of 1992, 1993, and 1994, as well as for the months and locations of the aerial survey. The spatial overlap of sea turtle abundance and shrimping intensity suggested regions where interactions are...
Tipo: Peer-Reviewed Reports
Palavras-chave: Density estimates; Endangered species; GIS; Gulf of Mexico; Kemp's ridley; Management; Sea turtles; Shrimp fishing; Spatial dynamics; Strip transect methods.
Ano: 2000

A Peri-Urban Neotropical Forest Transition and its Consequences for Environmental Services
Provedor de dados: 7
Tipo: Peer-Reviewed Reports
Palavras-chave: Exotic species invasion; Forest transition; GIS; Land-use change; Subtropical Argentina; Urbanization; Watershed conservation; Yungas.
Ano: 2008

Monitoring Current Status of and Trends in Boreal Forest Land Use in Russian Karelia
Provedor de dados: 7
Autores: Burnett, Charles; University of Salzburg; charles.burnett@sbg.ac.at; Fall, Andrew; Simon Fraser University; fall@cs.sfu.ca; Tomppo, Erkki; Finnish Forest Research Institute; Erkki.Tomppo@metla.fi; Kalliola, Risto; University of Turku; risto.kalliola@utu.fi.
Some of the last remaining near-natural boreal forest landscapes in northern Europe can be found in the Russian Karelia near its border with Finland. Currently, these forests are facing strong exploitation pressure in the form of extensive clearcuts. Demand for conservation is also high. We characterize the boreal forest landscape in the region and assess the impacts of past and potential management actions through a mapping and modeling study that synthesizes methods from landscape ecology, remote sensing, and simulation modeling. The forests of the study area were mapped using techniques for interpreting multitemporal satellite images and detecting changes. The species composition and structure of the forests were estimated using the multisource...
Tipo: Peer-Reviewed Reports
Palavras-chave: Karelia; Russia; Finland; Boreal forest; Conservation policy; Dynamic modeling; Fragmentation; Land use; GIS.
Ano: 2003

Relative reduction in annual soil loss in micro watersheds due to the relief and forest cover
Provedor de dados: 70
Autores: Mingoti,Rafael; Vettorazzi,Carlos A.
With the intense debate, in Brazil, between landowners and public agencies about the amount of area with forest cover needed in different regions, there is an increase of the need for provision of technical data used as a basis for decision making. One of the criteria to evaluate the effect of forest cover in protecting water resources is the soil loss, which leads to several consequences on the environment, including the silting of the rivers. Therefore, this study aimed to evaluate the reduction in the soil loss in micro watersheds with different reliefs, size and location of forest cover, in the Corumbataí River watershed, in the state of São Paulo, using the Revised Universal Soil Loss Equation (RUSLE) in a GIS environment. For this study, 18...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: GIS; RUSLE; Legal reserve; Permanent preservation area.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000600017

Georeferenced database generation with the purpose of hydrologic molding in reservoirs of the hydrographic basin of Jaguaribe river in the state of Ceará, Brazil
Provedor de dados: 70
Autores: Leão,Raimundo A. de O.; Soares,Antônio A.; Teixeira,Adunias dos S.; Silva,Demetrius D. da.
The edafoclimatic conditions of the Brazilian semiarid region favor the water loss by surface runoff. The state of Ceará, almost completely covered by semiarid, has developed public policies for the construction of dams in order to attend the varied water demand. Several hydrological models were developed to support decisive processes in the complex management of reservoirs. This study aimed to establish a methodology for obtaining a georeferenced database suitable for use as input data in hydrological modeling in the semiarid of Ceará. It was used images of Landsat satellite and SRTM Mission, and soil maps of the state of Ceará. The Landsat images allowed the determination of the land cover and the SRTM Mission images, the automatic delineation of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Geoprocessing; GIS; Hydrologic models; Curve number; Jaguaribe River; Semiarid.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000200017

USING SATELLITE TECHNOLOGY IMPROVE CHILEAN PURSEINE FISHING FLEET
Provedor de dados: 72
Autores: Yáñez,E.; Silva,C.; Nieto,K.; Barbieri,M.A.; Martínez,G.
A work of gathering historical fishing (catch, fishing effort, CPUE, characteristics and operation of purseiner fleet) and satellite (NOAA, SeaStar and SeaWind) database of northern Chile, and fishing and oceanographic in situ sampling for validation purpose is made. With this information and the use of geographical information system (GIS) the distribution of pelagic resources and the associated environmental conditions (sea surface temperature, thermal gradients, chlorophyll concentration and wind fields) are analysed in order to develop a probable fishing ground (PFG) index prediction model. A PFG model of anchovy (Engraulins ringens) is operative for the northern Chile. The impact of the use of PFG charts was evaluated analyzing the operational...
Tipo: Journal article
Palavras-chave: Pelagic fisheries; Northern Chile; Remote sensing; GIS; PFG index and model.
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000300048

Uso de um sistema de informações geográficas para quantificação de áreas remanescentes do cerrado.
Provedor de dados: 14
Autores: SANO, E. E.; JESUS, E. T. de; BEZERRA, H. da S.
bitstream/CPAC-2010/22815/1/comtec-62.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: GEOSEN100; Agricultural census; GIS; Geoprocessamento e Sensoriamento remoto: Caracterizacao ambiental.; Censo Agropecuário; Cerrado; Preservação da Natureza; Sistema de Informação Geográfica.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/566188

Uso da terra no municipio de Aquidauana em 1990 - Pantanal.
Provedor de dados: 14
Autores: SILVA, J. dos S. V. da; ROMERO, H. R.; MARISCO, N.
Este trabalho tem como objetivo identificar as formas de uso da Terra no municipio de Aquidauana, localizado no sudeste do Pantanal, em Mato Grosso do Sul. Foram mapeadas as areas antropicas e identificadas e quantificadas as respectivas classes tematicas de uso. Utilizaram-se imagens de satelite Landsat 5-TM, em papel, na escala 1:250.000, na composicao colorida 3B, 4G e 5R para espacializacao das informacoes e um Sistema de Informacoes Geograficas para a quantificacao das areas. A area do municipio foi calculada em 1.485.526 ha, dos quais 76,8% esta inserida na planicie do Pantanal. Foram mapeadas as seguintes classes de uso: Area Natural (88,42%), Pastagem Cultivada (11,34%), Area Urbana (0,12%) e Area Agricola (0,12%). As terras do municipio sao...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Area antropica; GIS; Antropogenic areas; Geographic information system.; Sensoriamento Remoto; Sistema de Informação Geográfica; Uso da Terra.; Pantanal; Land use; Remote sensing.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/790958

Mapeamento do uso e cobertura da terra na Bacia Experimental do Córrego Sarandi, DF em escala 1:5.000.
Provedor de dados: 14
Autores: CHAVES, T. A.; LIMA, J. E. F. W.; AQUINO, F. de G.; VILELA, M. de F.; GOMES, R. A. T.; CARVALHO JÚNIOR, O. A. de; GUIMARÃES, R. F.
bitstream/item/128194/1/bolpd-320.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Geoprocessamento; Gestão territorial; Aerophotogrammetry; GIS; Savanna.; Sensoriamento remoto; Aerofotogrametria.; Land management.
Ano: 2014
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1021541

The Channel habitat atlas for marine resource management (CHARM): an aid for planning and decision-making in an area under strong anthropogenic pressure
Provedor de dados: 5
Autores: Martin, C. S.; Carpentier, Andre; Vaz, Sandrine; Coppin, Franck; Curet, L.; Dauvin, J. -c.; Delavenne, Juliette; Dewarumez, J. -m.; Dupuis, L.; Engelhard, G.; Ernande, Bruno; Foveau, A.; Garcia, C.; Gardel, Laure; Harrop, S.; Just, R.; Koubbi, P.; Lauria, Valentina; Meaden, G. J.; Morin, Jocelyne; Ota, Y.; Rostiaux, Emilie; Smith, R.; Spilmont, N.; Verin, Yves; Villanueva, Ching-maria; Warembourg, Caroline.
The eastern English Channel, the narrow channel of water separating northern France and southeast England is an area of intense human use of the array of resources concentrated into its relative small area. The vulnerability of living resources and their habitats brought together French and British maritime experts within a common project (called CHARM): to create an atlas of marine resource habitats in the eastern English Channel so as to provide planners and decision-makers with the necessary information to help managing the use of its living and non-living resources. This multidisciplinary and richly illustrated atlas provides abundant information on the legal framework and physical environment; benthic invertebrates, fish and their habitats; fishing...
Tipo: Text
Palavras-chave: Eastern English Channel; Dover Strait; Benthos; Fish; Habitat; Ecosystem; Marine spatial planning; Fisheries; Legislation; Trophic network; Food web; GIS; Geographic Information System.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00000/11169/7523.pdf

Cartographic Atlas of Marine Environmental Law in West Africa. Methodology and use for spatial planning
Provedor de dados: 5
Autores: Le tixerant, Matthieu; Bonnin, Marie; Gourmelon, Françoise; Ragueneau, Olivier; Rouan, Mathias; Ly, Ibrahima; Ould zein, Ahmed; Ndiaye, Fatou; Diedhiou, Mohamed; Ndao, Souleye; Ndiaye, Mamadou Bassirou.
In the marine environment, positive law generates multiple zones and regulatory limits that overlap in space, justifying a cartographic representation as a relevant approach to promote understanding (synthetic vision), analysis (highlighting legal anomalies, inconsistencies and redundancies), dissemination and communication to different audiences (awareness-raising). The article presents a methodology leading to the mapping of marine and coastal environmental law in West Africa, using a geographic information base to produce static or interactive cartographic representations via a Geographic Data Infrastructure (GDI). It shows the contribution of this type of mapping to a transversal approach in a multi-activity, multi-sectoral and multi-scale context. A...
Tipo: Text
Palavras-chave: Afrique de l’ouest; Mer; Littoral; Droit de la mer; Environnement; SIG; Cartographie; West Africa; Sea; Coastal zone; Law of the sea; Environment; GIS; Cartography.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00656/76813/81628.pdf

Caractérisation hydrologique et microbiologique du bassin versant de Sainte Anne (Plouzané)
Provedor de dados: 5
Autores: Belloir, Jerome.
The coastline has many activities related to water quality such as bathing activities. Coastal catchments are known to be source of microbial input to the marine environment, their flows and runoff bringing important quantities of sediment, bacteria and other particles. Thus, a network of monitoring and modeling may be necessary to prevent economic losses such as a closure of beaches due to contamination. Hence, within the framework of project GIRAC, a modeling of river and E. coli flow in the Sainte-Anne catchment was developed. To implement the model AVSWAT on the catchment, a data collection (stream gauging, E. coli analyses) and work on GIS was necessary. The aim of this study is the hydrological and microbiological characterization of the catchment....
Tipo: Text
Palavras-chave: Bassin versant; Débits; Escherichia coli; SIG; Sainte-Anne; Catchment; River flow; Escherichia coli; GIS; Sainte-Anne.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00044/15571/12969.pdf

Identifying fisheries dependent communities in EU coastal areas
Provedor de dados: 5
Autores: Natale, Fabrizio; Carvalho, Natacha; Harrop, Michael; Guillen Garcia, Jordi; Frangoudes, Katia.
The importance of local communities relying on fisheries is constantly emphasised in the European Union's Common Fishery Policy. Previous studies have analysed fishery employment for the entire EU based on statistical figures aggregated by administrative units at the regional or provincial level. This paper adopts a geographical approach to identify EU coastal communities relying on fisheries using accessibility analysis, principles at the basis of gravity models and disaggregated population and employment statistics. The dependency on fisheries is calculated comparing estimated employment from fisheries at each port with general employment in the areas of accessibility surrounding the port. By considering spatially disaggregated statistics the importance...
Tipo: Text
Palavras-chave: Fisheries employment; Coastal communities; Accessibility; GIS; Gravity models.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00141/25206/26624.pdf

Spatio-temporal patterns in demersal elasmobranchs from trawl surveys in the eastern English Channel (1988-2008)
Provedor de dados: 5
Autores: Martin, Corinne; Vaz, Sandrine; Ellis, J. R.; Coppin, Franck; Le Roy, Didier; Carpentier, Andre.
Elasmobranchs have life-history characteristics that make them more vulnerable to fishing than many teleost fish. As commercial landings data are usually not sufficient for the monitoring and assessment of elasmobranchs, fisheries-independent data, geostatistics and Geographic Information Systems were used to investigate the spatio-temporal patterns of sharks (6 species), skates (9 species) and stingray in the eastern English Channel. Temporal trends in relative abundance and distributions of total-length frequencies were investigated using data collected over 21 yr from an annual survey using a Grande Ouverture Verticale (GOV) trawl. Temporal trends in relative abundance were examined qualitatively in relation to the reported conservation status for the...
Tipo: Text
Palavras-chave: Elasmobranchii; Chondrichthyes; Kriging; GIS; Conservation; Sex ratio; Catchability; Channel Ground Fish Survey; CGFS.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00019/13029/10160.pdf

Activity patterns, home-range size, and habitat utilization of Sarpa salpa (Teleostei : Sparidae) in the Mediterranean Sea
Provedor de dados: 5
Autores: Jadot, Catherine; Donnay, A; Acolas, M; Cornet, Y; Begout, Marie-laure.
Acoustic telemetry was used to record diel movement and habitat utilization of the salema (Sarpa salpa) (Teleostei: Sparidae) during three consecutive summers from 2000 to 2002 in the Calvi and Achiarina bays of Corsica in the Mediterranean Sea. A total of 18 fish was equipped with acoustic transmitters inserted in the body cavity, 13 were tracked in the Bay of Calvi (275 mm +/- 26.9 L-F), and 5 in Achiarina Bay (260 mm +/- 33.6 LF). Two different systems were used to track the fish. The one used in the Bay of Calvi was a manual receiver and a directional hydrophone. The second system, used in Achiarina Bay, was a radioacoustic-positioning (RAP) system that continuously monitored the movements of the fish. Fish positions were put in a geographic...
Tipo: Text
Palavras-chave: VRAP; Telemetry; Sarpa salpa; Manual tracking; Homing; Home range; Habitat utilization; GIS.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1107.pdf

Mortalités estivales de l'huître creuse (Crassostrea gigas) dans le bassin de Marennes-Oléron (France). Etude de la variabilité spataile des caractéristiques environnementales de croissance et de production par un Système d'Informations Géographiques (GIS)
Provedor de dados: 5
Autores: Soletchnik, Patrick; Le Moine, Olivier; Razet, Daniel; Geairon, Philippe; Faury, Nicole; Goulletquer, Philippe; Robert, Stephane.
The Marennes-Oléron Bay is the first cupped oyster production site (35,000 tons/year). For more than 10 years, this species has suffered chronic mortality episodes. A research program has been developed since 1994 in association with the professional sector, in order to try and explain these mortalities.
Tipo: Text
Palavras-chave: Production; Croissance; Modélisation; GIS; Système d'Informations Géographique; Crassostrea gigas; Huîtres; Mortalités estivales.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/acte-3377.pdf

Spatial patterns and GIS habitat modelling of Solea solea, Pleuronectes flesus and Limanda limanda fish larvae in the eastern English Channel during the spring
Provedor de dados: 5
Autores: Koubbi, Philippe; Loots, Christophe; Cotonnec, Gwenaelle; Harlay, Xavier; Grioche, Alain; Vaz, Sandrine; Martin, Canterbury Christ Church University; Walkey, Mike; Carpentier, Andre.
The spring distribution of larval fish stages of flatfishes in the Dover Strait (eastern English Channel) was studied in 1995 and 1999. Fish larvae were identified and sorted according to developmental stages in order to study their ontogenic distribution. The French coastal waters are characterised by an unstable tide-dependent front, which influences larval dispersion. In spring, the French coastal waters have a high phytoplanktonic production. They have higher temperatures, lower salinities and differences in current intensity compared with the central English Channel waters. Generalised Additive Models (GAM) combined with Geographic Information Systems (GIS) were used to model the potential habitats of life stages considering data from three major...
Tipo: Text
Palavras-chave: English Channel; Fish larvae; Geostatistics; GIS; GAM.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2090.pdf

Assessment of tropical shrimp aquaculture impact on the environment in tropical countries, using hydrobiology, ecology and remote sensing as helping tools for diagnosis
Provedor de dados: 5
Autores: Fuchs, Jacques; Martin, Jean-louis M.; Populus, Jacques.
After a period of rapid development of the sites (an increase in both reared surface area and production), tropical shrimp aquaculture is currently being faced with critical problems due to economical and ecological constraints. In many countries with favourable conditions for shrimp aquaculture such as indonesia or Vietnam, sites are often badly selected and/or over-exploited. This conducts to sorne extent to decreases or collapses in the production due to the difficulty in predicting the maximum production capacity of the sites. Furthermore, it appears that production sustainability depends on many factors among which socio-economy and ecolo gy are of prime importance. The STD3 project titled « Assessment of tropical shrimp aquaculture impact on the...
Tipo: Text
Palavras-chave: Interaction aquaculture - environnement; Aquaculture crevettes; Critères écologiques et socio-économiques; Sélection de sites; Suivi du développement; Télédétection; SIG; Impact assessment; Coastal environment; Shrimp culture; Biological and socio-economic criteria; Site selection; Remote sensing; GIS.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00132/24357/22357.pdf

Système d'Information Géographique (SIG) au Laboratoire Conchylicole de Poitou-Charentes (LCPC) : exemples d'utilisation et travaux en cours pour l'aide à la gestion spatiale des élevages conchylicoles
Provedor de dados: 5
Autores: Le Moine, Olivier.
The Geographic Information System on the Charentais sounds was one of the first developed by the research group SILLAGE (DEL/AO). The coastal regional shellfish laboratories are pursuing their efforts to enrich and develop the georeferenced databases, to reach a coherent and comprehensive meta-database. The shellfish resarch laboratory of Poitou-Charentes (LCPC) from IFEMER's departrnent of aquaculture resources has developed research themes based upon the GIS use, a powerful tool for spatial analysis. Those programs are commonly developed by ail shellfi sh coastal laboratory at IFREMER's level, prompting us to suggest the applications' transfers to other research units. Various applications and developments using Arc View software were reviewed in this...
Tipo: Text
Palavras-chave: Système d'Information Géographique; SIG; Gestion des écosystèmes conchylicoles; Suivis environmentaux en continu; Evaluation de stocks; Base de données; Geographic information system; GIS; Shellfish ecosystem management; In situ continuous environmental monitorings; Stock assessment; Database.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00031/14234/11510.pdf

Summer mortality of the Pacific cupped oyster Crassostrea gigas in the Bay of Marennes-Oleron (France). Spatial variability of environmental parameters, growth and production rates using a Geographical Information System (GIS)
Provedor de dados: 5
Autores: Soletchnik, Patrick; Le Moine, Olivier; Razet, Daniel; Geairon, Philippe; Faury, Nicole; Goulletquer, Philippe; Robert, Stephane.
The Marennes-Oleron Bay is the first rearing area in Europe for the cupped oyster, with 35 000 tons proudced on a yearly basis. This species has suffered several chronic summer mortalities for the last 10 years.
Tipo: Text
Palavras-chave: Marennes Oleron Bay; Geogaphical Information System; GIS; Production; Growth; Crassostrea gigas; Oysters; Summer mortality.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/acte-3376.pdf

ACTION RECOPLA - Inventaire et bancarisation des données de Géosciences Marines pour les façades Atlantique, Manche et Méditerranée
Provedor de dados: 5
Autores: Gautier, Emeric; Kerjean, Mathieu; Satra Le Bris, Catherine; Bourillet, Jean-francois.
This report presents the inventory work realized for all the Marine Geoscience dept data acquired on the French continental shelf. It lists the bathymetric, seismic and backscattering data acquired, processed and interpreted in English Channel, Atlantic and Mediterranean. All the maps used for this inventory are available within the GIS "Manche Atlantique" and "Golfe du Lion".
Tipo: Text
Palavras-chave: Inventaire; SIG; Manche; Atlantique; Méditerranée; Bathymétrie; Imagerie acoustique; Sismique; Données brutes; Traitées; Interprétées; GeoBIS; Inventory; GIS; Englsih Channel; Atlantic; Mediterranean Sea; Backscatter; Seismic; Raw; Processed; Interpreted data; GeoBIS.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00014/12558/9426.pdf

Fish Species in a Changing World: The Route and Timing of Species Migration between Tropical and Temperate Ecosystems in Eastern Atlantic
Provedor de dados: 5
Autores: Kaimuddin, Awaluddin H.; Laë, Raymond; Tito De Morais, Luis.
The presence of tropical species has been reported in Atlantic-European waters with increasing frequency in recent years. Unfortunately, the history of their migrations is not well understood. In this study, we examined the routes and timing of fish migrations in several ecosystems of the East Atlantic Ocean, combining several publicly available and unpublicized datasets on species occurrences. The species studied were those noted as exotic or rare outside their previous known area of distribution. We used sea surface temperature (SST) data obtained from 30 years of satellite observation to define three distinct time periods. Within these periods, temperature trends were studied in six ecosystems: the North Sea, the Celtic Sea, the South European Atlantic...
Tipo: Text
Palavras-chave: Speciesmigration; Atlantic-europeanwaters; Biogeographic; SST; Bathymetry; GIS.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00469/58030/60434.pdf

Intégration des données de l'atlas des marais atlantiques alimentés en eau de mer dans un système d'information à référence spatiale
Provedor de dados: 5
Autores: Loubersac, Lionel; Manaud, Francois; Loarer, Ronan; Kerdreux, Michel; Durand, Christophe.
This paper describes a method that refers to the integration of analogic data of an Atlantic salt marsh atlas into a GIS. So the steps of the method are developed after a description of the original data sources in the form of analogic thematic cartography and associated text. They include digitalization, geometric corrections, topology and attributes definition, hotlinks setting up between graphics, texts and images, information layers crossing and spatial analyses. Four main results are presented and discussed: (a) the atlas digital form presentation, (b) objects selection and theme surface computation in the case of salt exploitation, (c) salt marsh identification versus inland fresh water marshes, (d) intersection between digital atlas objects and...
Tipo: Text
Palavras-chave: Salt marsh; Digital cartography; GIS; Spatial analysis.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00191/30215/28613.pdf

Monitoring of sea scallops Placopecten magellanicus in bottom seeding trials using video in Miquelon bay, Saint Pierre et Miquelon, France
Provedor de dados: 5
Autores: Robert, Stephane; Le Moine, Olivier; Lunven, Michel; Caisey, Xavier; Gaffet, Jean-dominique; Le Gall, Erwan; Vasquez, Mickael; Rodriguez, Julien; Detcheverry, Sebastien; Goulletquer, Philippe.
Placopecten magellanicus production in Saint Pierre et Miquelon (NW North Atlantic) has been developed through direct seeding of juveniles on leased areas. However, most of the culture occurs in deep water ranging from 30 to 70 meters, which requires a monitoring by video to facilitate the grow-out and survival evaluation. In August 2008, a submersible leaded structure was connected by a video cable to the surface and observation screen was defined through the video, an altimeter and two lasers. The pictures were recorded on board on hard drive and digital video recorder DVCAM, and data were georeferenced by VIDEONAV software. Analysing the video tapes allows to establish a thematic database on the ground structure, presence or absence of seeded and wild...
Tipo: Text
Palavras-chave: Scallops; Placopecten magellanicus; GIS; Monitoring; Miquelon Bay.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00134/24544/22576.pdf

Pockmarks on the South Aquitaine Margin continental slope: The seabed expression of past fluid circulation and former bottom currents
Provedor de dados: 5
Autores: Michel, Guillaume; Dupre, Stephanie; Baltzer, Agnes; Ehrhold, Axel; Imbert, Patrice; Pitel, Mathilde; Loubrieu, Benoit; Scalabrin, Carla; Lazure, Pascal; Marie, Louis; Geldof, Jean-baptiste; Deville, Eric.
Inactive and mostly elongated pockmarks of 100–200 m in dimension were recently discovered on the South Aquitaine Margin continental slope. They are distributed at water depths greater than 350 m in both interfluve and sediment-wave areas, and are strongly controlled by the sedimentary morphology and architecture. Water column and seafloor backscatter and sub-bottom profiler data do not exhibit present-day or past gas evidence, e.g., massive and continuous gas releases at the seabed and fossil methane-derived authigenic carbonates. It is thus proposed that the pockmarks originated from a shallow source and result from relatively recent and short-duration gas or water expulsion events. Former near-bottom currents may have contributed to the elongation of...
Tipo: Text
Palavras-chave: Pockmark; Fluid; Seabed morphology; Aquitaine slope; GIS; Currents.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00413/52491/53279.pdf

An example of GIS potentiality for coastal zone management: preselection of submerged oyster culture areas near Marennes-Oleron (France)
Provedor de dados: 5
Autores: Durand, H.; Guillaumont, Brigitte; Loarer, Ronan; Loubersac, Lionel; Heral, Maurice; Prou, Jean.
The Charente Maritime coast, in central western France, is the most important area for oyster and mussel production in Europe. High density, in this restricted intertidal area, induces low growing rate and socio-economic difficulties. One of the possible solutions is to shift some oysters from intertidal area to submerged areas. Bathymetry, sedimentology, hydrodynamism, fisheries and administrative rules are some conditions which are considered to establish the better selection of potential zone. The successive steps of setting up the prototype of GIS are presented: digitized traditional data from charts, extracted data from grid models (hydrodynmaic model), merging of thematic covers, proposal of favorable areas. The results are discussed especially on...
Tipo: Text
Palavras-chave: GIS; Modelisation; Bathymetry; Sedimentology; Hydrodynamism; Marennes Oleron.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00017/12784/9725.pdf

The Gulf of Maine biogeographical information system project: developing a spatial data management framework in support of OBIS
Provedor de dados: 5
Autores: Tsontos, Vm; Kiefer, Da.
Central to the development of an inventory of marine life and improved conceptual understanding of the mechanisms that dynamically shape species distribution patterns is the implementation of strategies aimed at enhancing assimilation and access to existing biogeographical information. Using the Internet as a medium, the Gulf of Maine Biogeographic Information System (GMBIS) project provides a framework and a set of reusable tools for the integration, visualization, analysis and dissemination of diverse types of biogeographical and oceanographic information. End-to-end viability of this approach is demonstrated in the context of a series of scientific storylines and a pilot application for the Gulf of Maine (GoM), a well-studied ecosystem that has been...
Tipo: Text
Palavras-chave: Système d'information; Biogéographie; Biodiversité; Golfe du Maine; Information system; GIS; Biogeography; Biodiversity; Gulf of Maine.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43302/43038.pdf

A regional analysis of weather mediated competition between a parasitoid and a coccinellid predator of oleander scale
Provedor de dados: 82
Autores: Gutierrez,Andrew P.; Pizzamiglio,Marina A.
The regulation of an asexual population of the oleander scale [Aspidiotus nerii Bouchè (Hemiptera: Diaspididae)] on California bay tree [Umbellularia californica (Hopk. &amp;amp; Arn.) Nut.] by two natural enemies; an idiobiont, ectoparasitoid Aphytis chilensis Howard (Hymenoptera: Aphelinidae) and a coccinellid predator (Rhysobius lophanthae (Blaisd.) (Coleoptera: Coccinellidae), was examined using a general weather-driven, tri-trophic, physiologically based age-mass structured demographic model. The model is of intermediate complexity and was parameterized using extensive laboratory data and field observations from Albany, CA. Temperature-dependent physiological indices were estimated from the laboratory data and used to scale per capita growth,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: GIS; Population dynamics; Olive; Physiologically based model.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000100009

特集「積雪寒冷地における緑化工技術の現状と課題」(II), GISを用いた北海道音更町における耕地防風林の評価
Provedor de dados: 19
Autores: 辻, 修; 宗岡, 寿美; 武田, 一夫; 土谷, 富士夫; TSUJI, Osamu; MUNEOKA, Toshimi; TAKEDA, Kazuo; TSUCHIYA, Fujio.
日本の最北端に位置する北海道の十勝地方音更町において，GIS 上に耕地防風林のデータベースを構築することにより，その実態を明らかにし，耕地防風林の減少に歯止めをかけることを目的とした。その結果，音更町の耕地防風林延長は，1995 年が242.3 km，2003 年が255.0 km であり，この8 年間で12.7 km 増加した。耕地防風林樹種別延長割合は，2003 年度においてカラマツ (Larix kaempferi (Lamb.) Carriere) 74.9％，シラカンバ(Betula platyphylla sukatchev var. japonica (Miq.) Hara)9.5％，トドマツ (Abies sachalinensis Fr. Schm.) 3.0％，アカエゾマツ (Picea glehnii (Fr. Schm.) Masters.) 0.5％，その他12.1％ であった。耕地防風林延長を樹高別で比較すると，この8 年間において樹高20 m 以上の耕地防風林は54 km も減少したが，10 m 以下の耕地防風林は7 km しか増加しなかった。耕地防風林の減風効果領域は延長と逆に，この8 年間で1,423 ha も減少した。耕地防風林の減風効果領域と風害発生箇所の関係より，耕地防風林が風害防止に効果を発揮していることが再確認できた。 This research was done to slow the decrease in the use of windbreaks by preparing windbreaks database showing their effectiveness in preventing wind damage in Otofuke, Tokachi...
Palavras-chave: 耕地防風林; GIS; 風害; カラマツ; 十勝地方; Windbreak; GIS; Wind erosion damage; Larch; Tokachi region.
Ano: 2006
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2873

Development and Application of the GIS-Based Water Mass Analysis Integrated System.
Provedor de dados: 20
Autores: Zhang, Yuexia; MIao, Zhenqing; Yan, Shiqiang.
The research on water masses is always one important facet of Oceanography. I adopt the method of Fuzzy Density Clustering to analyse water masses. Meanwhile, I use Visual Basic 6.0 as developing platform and utilize the MapX components to develop the platform of GIS.  By integrating the Water Masses Model compiled by FORTRAN language, and GIS using Tight Coupling, I develop an Integrated System. That makes all phases are finished in one condition, including the gain of computing grid, the pick-up and analysis of data, the choice of parameters and resetting, the computing of model, and the result’s visualization. It improves the efficiency of the data analysis and decision-making. Finally, this system is applied in the Zhoushan fishing ground and adjacent...
Tipo: Journal Contribution
Palavras-chave: Water masses; GIS; Models.
Ano: 2008
URL: http://hdl.handle.net/1834/5877

Using Geographic Information Systems (GIS) to describe the community from Ortoire to Guayaguayare: Site description and vessel migration
Provedor de dados: 20
Autores: Kishore, R.; Padmanabhan, S.; Ramsundar, H.
The assessment of the fishing industry on the southeast coast of Trinidad is taken from the regionally funded community-based coastal resource management project by the International Research Development Centre (IDRC) of Canada and entitled “An investigation of fisheries resources, resource users and fisheries management by communities to establish a framework for co-management: Ortoire to Guayaguayare, East Coast, Trinidad.” Part of this assessment was clearly describing the areas and communities where regular fishing activities take place and identifying any discernable patterns and trends.
Tipo: Other
Palavras-chave: GIS; Fishing vessels; Fishery industry; Fishery resources; Fishery management; Fishery management; Fishing vessels; Fishery resources.
Ano: 2006
URL: http://hdl.handle.net/1834/2896

Détermination fractale des types de cotes basée sur les systèmes d’informations géographiques : cas de la Tunisie
Provedor de dados: 20
Autores: Bel Hassen, M.; Azizi, M.
Les dimensions fractales des côtes tunisiennes ont été déterminées en utilisant les techniques spatiales fournies par les systèmes d’informations géographiques, en se basant sur une cartographie au 1 :100000 du trait côte. La dimension fractale des côtes tunisiennes est estimée à 1,0805. Une segmentation des côtes en trois parties (nord, est et sud) a permis de mettre en évidence une décroissance de la dimension fractale du nord vers le sud, indiquant que la complexité de la côte décroît vers les faibles latitudes. De nombreuses conséquences découlent de ces résultats, applicables à des stratégies d’échantillonnage, comme à la compréhension de l’écologie et  l’interprétation de la distribution des espèces et les modèles de biodiversité.
Tipo: Journal Contribution
Palavras-chave: Biodiversity; Cartography; Coastal morphology; Coasts; GIS; Geomorphology; Mapping; Mathematical analysis.
Ano: 2006
URL: http://hdl.handle.net/1834/4279

Descripción morfológica de la plataforma continental del Ecuador y análisis comparativo con la plataforma jurídica mediante la aplicación de Sistemas de Información Geográfica
Provedor de dados: 20
Autores: Martillo, C.; Pazmiño, A.; Chunga, K.; Resl, R.
El presente estudio realiza un análisis morfoestructural de las plataformas que están en el territorio marìtimo ecuatoriano:(1)La Plataforma de las Islas Galápagos que es producto de la interacción entre el Punto Caliente de Galápagos y el Centro de Divergencia de Galápagos, y (2) La Plataforma Continental del Ecuador continental localizada en un margen activo convergente entre la placa oceánica de Nazca y los segmentos continental de la placa Sudamericana y del Bloque Norandino. Mediante el uso de Sistemas de Información Geográfica (SIG) y Modelos Digitales de Terreno (MDT), se caracterizó morfológicamente la proyección de la plataforma continental hacia el segmento marino, para luego realizar una confrontación entre el área que incluye la plataforma...
Tipo: Journal Contribution
Palavras-chave: Marine geology; Coastal morphology; Continental shelves; GIS; Law of the sea.
Ano: 2010
URL: http://hdl.handle.net/1834/4218

A Simple Non-Parametric Gis Model For Predicting Species Distribution: Endemic Birds In Bioko Island
Provedor de dados: 20
Autores: Fa, J.E.; Lenton, S.M.; Del Val, J.P.
Species mapping is a useful conservation tool for predicting patterns of biological diversity, or identifying geographical areas of conservation significance. Mapping can also improve our understanding of the appropriateness of habitat areas for individual species. We developed a new model, PREDICT, for mapping habitat suitability of plant and animal species from incomplete field survey data. PREDICT is a statistical program written for use within a GIS (geographic information system). It produces images and statistics that assess the potential of unstudied areas for wildlife for which presence/absence data and basic habitat information are available. Suitability for a target species is determined within surveyed and non-surveyed squares by a form of...
Tipo: Journal Contribution
Palavras-chave: GIS; Biodiversity; Fish species.
Ano: 2000
URL: http://hdl.handle.net/1834/705

Aspectos generales sobre la estructura térmica superficial del mar, de la zona comprendida entre el golfo de Penas y la boca occidental del estrecho de Magallanes
Provedor de dados: 20
Autores: Boré, D.; Barbieri, M.A.; Catasti, V.
This study was carried out within the Project Cimar-Fiordo 2. The general objective was to describe the sea surface temperature in the zone between 46º LS and 52º LS, and from the 73º 52’ LW to the 76º 30’ LW, considering the channel and fjord zone. The analysis was based on satellite images of sea surface temperature. The images used came from the AVHRR radiometer of the NOAA satellite, from the year 1995 to 1998.   The cartographic representation and the analysis of the seasonal variability of the sea surface temperature was made using the software of the Geographical Information System (GIS), named IDRISI. The zone was with clouds during all the period of study, mainly in autumn. With the available images it was possible to observe a big difference...
Tipo: Journal Contribution
Palavras-chave: Water temperature; Fjords; GIS; Satellite sensing; Radiometers; Surface temperature; Sea water; Thermal structure; Water temperature; Fjords; Radiometers; Sea water.
Ano: 2001
URL: http://hdl.handle.net/1834/1578

Modélisation de l’habitat des ressources halieutiques dans le golfe de Gabès et projections selon un scénario de changement global
Provedor de dados: 20
Autores: Hattab, T.; Ben Rais Lasram, F.; Sammari, Ch.
Le golfe de Gabès situé au sud-est de la Tunisie, est la région où l’activité de pêche est la plus développée du pays. L’intensité de cette activité a eu des conséquences négatives sur l’écosystème (diminution de la productivité, changements dans la composition spécifique des assemblages, recul du couvert végétal etc…) qui, par ailleurs, est le siège d’une pollution importante et où le changement global se fait de plus en plus ressentir. Il est maintenant démontré que le changement global ne peut pas être sans impact sur le fonctionnement des écosystèmes. Cependant, jusqu’à aujourd’hui, aucune étude n’a démontré d’une manière objective les modifications qui pourront avoir lieu dans l’écosystème du golfe de Gabès suite à ces changements. Ce travail a donc...
Tipo: Journal Contribution
Palavras-chave: Remote satellite sensing; Habitat; Marine resources; Habitats; GIS.
Ano: 2011
URL: http://hdl.handle.net/1834/4736

Un sistema de información ambiental aplicado a la conservación en la Antártida
Provedor de dados: 20
Autores: Fernández, M.A.; Arcos, F.
Mediante trabajo realizado en base a información satelitaria y a información generada en campo durante las expediciones ecuatorianas a la Antártica se dá a conocer los elementos ambientales que se pretenden utilizar para planificar un manejo compatible con la conservación del ecosistema en Punta Fort William, Isla Greench.
Tipo: Journal Contribution
Palavras-chave: GIS; Multiship expeditions; Environmental monitoring; Environmental monitoring.
Ano: 1993
URL: http://hdl.handle.net/1834/3807

Análise Multitemporal da Cobertura Florestal da Microbacia do Arroio Grande, Santa Maria, RS
Provedor de dados: 190
Autores: Kleinpaul, Joel Juliano; Pereira, Rudiney Soares; Hendges, Elvis Rabuske; Benedetti, Ana Carolina Paim; Zorzi, Cícero; Ferrari, Renata.
Este trabalho teve como objetivo realizar uma análise multitemporal da cobertura florestal da microbacia do Arroio Grande, Santa Maria, RS. Foram utilizadas quatro imagens de satélite: LANDSAT 5 (1987), LANDSAT 5 (1995), LANDSAT 7 (2002) e CBERS 2 (2005). As imagens foram classificadas empregando-se o algoritmo Bhattacharya. Após a classificação das imagens, foi realizado o cruzamento dos mapas temáticos. Como resultado, obteve-se mapas com os seguintes usos da terra: cobertura florestal, regeneração e desmatamento, ou seja, as florestas que permaneceram inalteradas de uma época para outra, as que regeneraram e as que foram desmatadas. Para um período de 18 anos, a cobertura florestal aumentou 10,24% na área da microbacia, passando de 14.135,42 ha (40,01%)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sensoriamento remoto; SIG; Dados multitemporais. Remote sensing; GIS; Multitemporal data; Brazil.
Ano: 2011
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/235

How much can be gained by optimizing nutrient abetment spatially – Cost – efficiency comparison of non – point arable loads from different Finnish watersheds
Provedor de dados: 31
Autores: Helin,   Janne; Tattari,   Sirkka.
Targeting has become the buzz word in the national agri-environmental policy reform in Finland. It is generally accepted that more environmental benefits could be reaped by implementing environmental protection measures where they have the biggest positive impact. However, considering one of the main environmental problems in Finland resulting from agriculture, eutrophication, the identification of first-best policy or even the biggest contributors among the diffuse nutrient sources remains as a considerable challenge. The model developed in this study aims to demonstrate how the agricultural nutrient load potential can be calculated in a way which supports the identifying of cost-efficient abatement policies. We use metamodeling of dynamic nutrient load...
Tipo: Conference Paper or Presentation
Palavras-chave: Nutrient abatement; Nitrogen; Phosphorus; Non-linear optimization; GIS; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Land Economics/Use; Productivity Analysis.
Ano: 2010
URL: http://purl.umn.edu/109381

Impact of irrigation on poverty and environment in Ethiopia. Draft Proceeding of the Symposium and Exhibition held at Ghion Hotel, Addis Ababa, Ethiopia 27th -29th November, 2007
Provedor de dados: 31
Autores: Awulachew,   Seleshi Bekele; Loulseged,   Makonnen; Yilma,   Aster Denekew.
Tipo: Presentation
Palavras-chave: Poverty; Crop management; Irrigated farming; Rainfed farming; Irrigation systems; Food security; Water harvesting; Institutions; Environmental effects; Public health; Malaria; GIS; Remote sensing; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; Institutional and Behavioral Economics; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/118410

INTEGRATION OF GEOGRAPHICAL INFORMATION SYSTEMS BASED SPATIAL ANALYSIS IN RECREATION DEMAND ANALYSIS
Provedor de dados: 31
Autores: Bhat,   Gajanan; Bergstrom,   John C.
This study has examined the use of an Object-Oriented GIS framework to generate and analyze spatial data in recreation demand analysis.  Several forms of GIS analysis are introduced and explained as how they can be utilized in recreational demand analysis.  An application of GIS to calculate journey distance and duration has been illustrated with a case study of camping activities in Cherokee National Forest, North Carolina.  The recreation demand models using these travel distance and duration are then compared with the models using respondent's stated values and models using distance data obtained from ZIPFIP software.  Based on the criteria such as   2 statistic, individual coefficient significance, it is found out that travel cost functions based on...
Tipo: Working or Discussion Paper
Palavras-chave: GIS; Spatial Analysis; Recreation Demand; Travel Cost method; Demand and Price Analysis; Resource /Energy Economics and Policy.
Ano: 1996
URL: http://purl.umn.edu/16649

The Impact of Agriculture on Waterfowl Abundance: Evidence from Panel Data
Provedor de dados: 31
Autores: Wong,   Linda; van Kooten,   G. Cornelis; Clarke,   Judith A.
Agricultural expansion and intensification in Canada’s Prairie Pothole Region (PPR) have contributed to declining waterfowl populations since the 1970s. Although this region represents a mere 10% of North America’s waterfowl breeding habitat, it produces over 50% of the continent’s duck population and roughly 60% of Canada’s agricultural output. Thus, intense competition exists between private economic interests and public benefits in the PPR. To better understand the conflict between agricultural and wildlife uses of land, panel methods are used to examine the spatiotemporal variation of waterfowl populations and agricultural land use intensity in the PPR from 1961-2006. For the main static model, we find that a one percent increase in cropland or pasture...
Tipo: Working or Discussion Paper
Palavras-chave: Wetlands protection; Spatial econometrics; GIS; Land use conflict; Migratory waterfowl; Community/Rural/Urban Development; Environmental Economics and Policy; Q57; C33; Q15; Q24.
Ano: 2011
URL: http://purl.umn.edu/98422

Sustaining surface and groundwater resources; Proceedings of the Internatinal Workshop on Conjunctive Water Management for Sustainable Irrigated Agriculture in South Asia, April 16-17, 2002 Lahore, Pakistan
Provedor de dados: 31
Tipo: Presentation
Palavras-chave: Water resource management; Conjunctive use; Surface water; Groundwater; Models; Crop production; Water requirements; Water balance; Water table; Sustainable agriculture; Environmental sustainability; Supplementary irrigation; Water quality; Rain; Pumping; Salinity control; Remote sensing; GIS; Water scarcity; Farm income; Institutional development; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Institutional and Behavioral Economics; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/118417

Are EU spatial ex ante coexistence regulations proportional?
Provedor de dados: 31
Autores: Demont,   Matty; Daems,   W.; Dillen,   Koen; Mathijs,   Erik; Sausse,   C.; Tollens,   Eric.
The EU is currently struggling to implement coherent coexistence regulations on genetically modified (GM) and non-GM crops in all member states. While it stresses that any approach needs to be “proportionate to the aim of achieving coexistence”, very few studies have actually attempted to assess whether the proposed spatial ex ante coexistence regulations (SEACERs) satisfy this proportionality condition. In this article, we define proportionality as a functional relationship which is weakly increasing in the incentives for coexistence. We propose a spatial framework based on an existing landscape and introduce the new concept of shadow factor as a measure for the opportunity costs induced by SEACERs. This enables comparing the proportionality of (i) rigid...
Tipo: Conference Paper or Presentation
Palavras-chave: Policy analysis; GIS; Shadow factor; Agricultural and Food Policy; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/44191

Economics of Sourcing Cellulosic Feedstock for Energy Production
Provedor de dados: 31
Autores: Gustafson,   Cole R.; Maung,   Thein A.; Saxowsky,   David M.; Nowatzki,   John; Miljkovic,   Tatjana.
This study investigates the economics of supplying wheat straw and corn stover within 100 mile radius of a potential new biorefinery in southeast North Dakota. In particular, straw and stover total delivery costs, potential straw and stover supply sites and least cost transportation routes are identified using a linear programming transport model and a GIS (Geographic Information Systems) mapping system. We show that USDA/NRCS (Natural Resources Conservation Service) future crop residue removal rate policies will be important for determining whether it is economically viable to harvest crop residues as potential feedstock for energy generation. Increase in residue removal rates narrow the size of residue supply areas and consequently result in lowering...
Tipo: Conference Paper or Presentation
Palavras-chave: Wheat Straw; Corn Stover; Density; Transportation Cost; GIS; Community/Rural/Urban Development; Crop Production/Industries.
Ano: 2011
URL: http://purl.umn.edu/103260

Borders, Market Size and Urban Growth, The Case of Saxon Towns and the Zollverein in the 19th Century
Provedor de dados: 31
Autores: Ploeckl,   Florian.
Changes in trade institutions, such as the abolishment of tariff barriers, have a potentially strong impact on economic development. The Zollverein, the 1834 customs union between German states, erased borders in much of central Europe. This paper investigates the Zollverein's economic impact through a study of urban population and its growth in the German state of Saxony.  A model of the effect of market access on urban growth is combined with an extensive data set on town populations in Saxony and its neighbors as well as an improved distance measure based on GIS techniques, which take into account elevation patterns, roads, and rivers.  The results show that Zollverein membership led to significantly higher growth for towns close to the border with...
Tipo: Working Paper
Palavras-chave: F15; N93; R12; International Relations/Trade; Zollverein; Saxony; Customs Union; Market Access; Economic Geography; GIS; Distance measurement.
Ano: 2008
URL: http://purl.umn.edu/229132

Suitability assessment of olive plantations for Iberian Lynx habitat restoration
Provedor de dados: 31
Autores: Nekhay,   Olexandr; Gonzalez-Arenas,   J.; Arriaza Balmón,   Manuel.
This study adopts a twofold methodological approach to assessing the suitability of agricultural areas for wildlife habitat restoration. Embedding expert judgements through an Analytic Hierarchy Process (AHP) and Geographical Information Systems (GIS) about the effect of specific elements of the landscape on Iberian lynx (Lynx pardinus) habitat restoration potentiality as an indicator of selection of the most suitable agricultural areas to be transformed to the natural state (Mediterranean forest and scrublands). The case study is the olive (Olea europaea L.) plantations of the mountain areas of Andalusia (Spain) which, because of their low yield, are likely to be abandoned after the decoupling of the EU olive oil subsidies. The results suggest that the...
Tipo: Conference Paper or Presentation
Palavras-chave: Analytic hierarchy process (AHP); GIS; Lynx pardinus; Habitat restoration; Spain; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/43603

PROTECTED HORTICULTURE AND ENVIRONMENT. AN INTEGRAL DECISION MODEL FOR GREENHOUSE WASTE MANAGEMENT IN SOUTHEASTERN SPAIN
Provedor de dados: 31
Autores: Gomez,   Salvador Parra.
Over 380000 tons of vegetable waste is produced annually in the “Campo de Dalías” zone (Almería, Spain), deriving from the diverse existing crops grown under plastic cover. Landfills containing this vegetable waste are a potential breeding ground for diseases and pests, they can also be the subject of uncontrolled burning, cause a riverbed blockage and, at the same time, they are an unsightly aspect of the landscape. The only way to prevent or minimize this problem is to adopt a comprehensive and environmentally sensitive waste management program. The utilization of the Contingent Valuation Method (CVM) has allowed the monetarization of the total environmental benefit of the projects undertaken, composting plant or in an energy recycling process, to the...
Tipo: Conference Paper or Presentation
Palavras-chave: Contingent Valuation Method; GIS; Cost-Benefit Analysis.; Demand and Price Analysis; Environmental Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/6399

Increasing Protection of GIS at the WTO: Clawbacks, Greenfields and Monopoly Rents
Provedor de dados: 31
Autores: Yeung,   May T.; Kerr,   William A.
Currently there are proposals and negotiations regarding the strengthening of protection for geographic indicators (GIs) in the WTO. A major proponent of stronger protection for GIs has been the European Union. One of the arguments it has put forward for stronger protection has been that it will provide an avenue for economic development for agricultural producers in developing countries – a way to capture rents in the markets of developed countries. This paper first outlines the proposed changes to the international protection of geographic indicators. Second, the potential for groups of producers to generate and capture rents in foreign markets is assessed under differing assumptions pertaining to industry structure, product differentiation in the short...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural and Food Policy; International Development; International Relations/Trade; WTO; GIS.
Ano: 2008
URL: http://purl.umn.edu/43459

Prefarm Systems and economical analysis of practical experiences
Provedor de dados: 31
Autores: Gnip,   Pavel; Kafka,   Stepan; Cepicky,   Jachym; Charvat,   Karel.
The system of Precision farming guarantees a detail monitoring of data and information necessary for a successful decision in a crop production. The system is designed for a data collection from several sources. The data are collected by a service company and also directly by farmers. The paper also analyses the economical efficiency on the base of Medlov Farm. Next development is currently running under projects Prezem and AgriSensor.
Tipo: Journal Article
Palavras-chave: GPS; GIS; Precision farming; Economical analysis; Monitoring; Farm Management; Research and Development/Tech Change/Emerging Technologies.
Ano: 2009
URL: http://purl.umn.edu/96855

CO-EXISTENCE COSTS UNDER GERMAN REGULATION - CASE STUDIES OF BT MAIZE
Provedor de dados: 31
Autores: Reitmeier,   Daniela; Menrad,   Klaus.
Paper prepared for presentation at the 10th ICABR International Conference on Agricultural Biotechnology: Facts, Analysis and Policies Ravello (Italy), June 29th to July 2nd, 2006
Tipo: Conference Paper or Presentation
Palavras-chave: Co-existence measure; GMO; Bt maize; GIS; Germany; Agricultural and Food Policy; L51; O32.
Ano: 2006
URL: http://purl.umn.edu/91329

Poverty Mapping in Rural Syria for Enhanced Targeting
Provedor de dados: 31
Autores: Szonyi,   Judit A.; de Pauw,   Eddy; La Rovere,   Roberto; Aw-Hassan,   Aden.
Poverty maps allow assessing the well-being of rural population in a spatial context and identifying poverty hotspots. The maps can be used for regional policy analysis as they help in identifying areas where the rural poor live and where rural poverty is determined by the endowment and quality of natural resources and by population pressure. Natural resource endowment was assessed in the study by calculating an Agricultural Resource Index based on the availability of different major agricultural resources. Income per-capita was calculated by using census data, adjusted by the rural population density. The results show that the better income areas of Syria are located in the irrigated or higher-rainfall areas, but lower-income pockets exist due to the...
Tipo: Conference Paper or Presentation
Palavras-chave: Poverty maps; Resource endowment; Agricultural income distribution; GIS; Syria; Food Security and Poverty; C21; C8; D3; I3; R0.
Ano: 2006
URL: http://purl.umn.edu/25564

Multimedia Mapping and GIS Integration for Data Acquisition and Sustainable Resource Management in Extension
Provedor de dados: 31
Autores: Joseph,   Edwin.
Belize City, Belize 23rd - 27th July, 2007
Tipo: Presentation
Palavras-chave: GIS; GPS; Multimedia technologies; Extension; Agribusiness; Q16.
Ano: 2009
URL: http://purl.umn.edu/122909

Establecimiento de un precio optimo ambiental y social para el agua de riego mediante la internalizacion de los costes ambientales y el uso de matrices de contabilidad social...
Provedor de dados: 31
Autores: Elorrieta,   Jose Ignacio; Castellano,   E.; de Anguita,   P. Martinez; Pellitero,   M.; Rey,   Concepcion.
RESUMEN: Se propone una metodología para obtener un "precio social y ambiental óptimo" que pueda aplicarse al agua de riego en la Comunidad Foral de Navarra (CFN) de modo que maximice la internalización de los costes ambientales asociados al consumo no contemplados en el actual precio sin que el nivel general de la economía regional se resienta. Para ello se elabora un modelo económico sobre un Sistema de Información Geográfica (SIG) que permite cuantificar y valorar los costes ambientales en cada una de las subcuencas de la Comunidad. Para valorar íntegramente el agua, los elementos que se tienen en cuenta son: volumen, calidad y riesgo de afectar a los ecosistemas acuáticos y de ribera.  Estos valores son estimados mediante métodos de valoración...
Tipo: Journal Article
Palavras-chave: Water; Social optimal price; GIS; Social Accounting Matrix (SAM); Externalities; Q25; Q14.
Ano: 2003
URL: http://purl.umn.edu/28745

Precision Agriculture Technology Adoption for Cotton Production
Provedor de dados: 31
Autores: Paxton,   Kenneth W.; Mishra,   Ashok K.; Chintawar,   Sachin; Larson,   James A.; Roberts,   Roland K.; English,   Burton C.; Lambert,   Dayton M.; Marra,   Michele C.; Larkin,   Sherry L.; Reeves,   Jeanne M.; Martin,   Steven W.
Many studies on the adoption of precision technologies have generally used logit models to explain the adoption behavior of individuals. This study investigates factors affecting the number of specific types of precision agriculture technologies adopted by cotton farmers. Particular attention is given to the influence of spatial yield variability on the number of precision farming technologies adopted, using a Count data estimation procedure and farm-level data. Results indicate that farmers with more within-field yield variability adopted a larger number of precision agriculture technologies. Younger and better educated producers and the number of precision agriculture technologies were significantly correlated. Finally, farmers using computers for...
Tipo: Conference Paper or Presentation
Palavras-chave: Precision technologies; Poisson; Negative Binomial; Count-data method; GIS; Education; Cotton; Agricultural and Food Policy; Farm Management; Labor and Human Capital; Land Economics/Use; Productivity Analysis; Resource /Energy Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/56486

Valuation of environmental impacts of the Rural Development Program  - A hedonic model with application of GIS
Provedor de dados: 31
Autores: Liljenstolpe,   Carolina.
The payments within the Rural Development Programme 2007- 2013 seek to improve the environment and contribute to rural development and economic growth. These policy measures may therefore have visual effects on the rural landscape. To achieve a measure of willingness to pay for these effects, a hedonic pricing approach is applied. The prices for staying at holdings in the “Staying on farms” registry are used to quantify the valuation of these visual effects. The results of this study indicate that there is a relationship between the price of rental objects and spatial variables constructed in GIS. Riparian strips and animals at the farm are positively valued. Cultivated land, grazing and meadow lands close to the settings are negatively valued. Hence, this...
Tipo: Conference Paper or Presentation
Palavras-chave: Hedonic Valuation; Rural landscape; Rural Development Program; GIS; Agricultural and Food Policy; Community/Rural/Urban Development; Q150; Q180; Q510.
Ano: 2011
URL: http://purl.umn.edu/98881

Analysis of the Economic Effects of Requiring Post-harvest Processing for Raw Oysters
Provedor de dados: 31
Autores: Muth,   Mary K.; Viator,   Catherine; Karns,   Shawn A.
Tipo: Conference Paper or Presentation
Palavras-chave: Oysters; Post-harvest processing; Hydrostatic pressure; Cool pasteurization; GIS; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety; L510; Q180; Q220.
Ano: 2011
URL: http://purl.umn.edu/103814

Modeling Cellulosic Bioenergy Feedstock Supply
Provedor de dados: 31
Autores: Archer,   David W.
Tipo: Conference Paper or Presentation
Palavras-chave: Bioenergy; Feedstock; GIS; Corn stover; Wheat straw; Environmental Economics and Policy; Production Economics; Resource /Energy Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/61372

Regional Supply Capacity of Agricultural Products in Shandong Province Based on GIS
Provedor de dados: 31
Autores: Yang,   Liping; Guo,   Honghai; Yao,   Huimin; Sun,   Xiaoqing; Yang,   Ping; Wang,   Yong; Zhang,   Weizhan.
The authors select six indices of resource endowment, supply scale and structure of agricultural products in assessment area of China, and then use Factor Analysis Method and Geographic Information System (GIS) technology to classify the supply capacity of agricultural products in 140 counties and cities of Shandong Province. The authors also made a comprehensive quantitative and locational evaluation. Based on this, the authors put forward some suggestions on how to improve the supply capacity of agricultural products in Shandong Province of China.
Tipo: Thesis or Dissertation
Palavras-chave: Supply capacity of agricultural products; Factor Analysis Method; GIS; Shandong Province of China; Agricultural and Food Policy; Crop Production/Industries; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Marketing; Research Methods/ Statistical Methods.
Ano: 2009
URL: http://purl.umn.edu/53599

Bayesian Model Averaging in the Context of Spatial Hedonic Pricing: An Application to Farmland Values
Provedor de dados: 31
Autores: Cotteleer,   Geerte; Stobbe,   Tracy; van Kooten,   G. Cornelis.
Since 1973, British Columbia created an Agricultural Land Reserve to protect farmland from development. In this study, we employ GIS-based hedonic pricing models of farmland values to examine factors that affect farmland prices. We take spatial lag and error dependence into explicit account. However, the use of spatial econometric techniques in hedonic pricing models is problematic because there is uncertainty with respect to the choice of the explanatory variables and the spatial weighting matrix. Bayesian model averaging techniques in combination with Markov Chain Monte Carlo Model Composition are used to allow for both types of model uncertainty.
Tipo: Working or Discussion Paper
Palavras-chave: Bayesian model averaging; Markov Chain Monte Carlo Model Composition; Spatial econometrics; Hedonic pricing; GIS; Urban-rural fringe; Farmland fragmentation; Environmental Economics and Policy; Farm Management; Land Economics/Use; R11; R15; C50; R14.
Ano: 2007
URL: http://purl.umn.edu/37046

The Value of Good Neighbors: A Spatial Analysis of the California and Washington Wine Industries
Provedor de dados: 31
Autores: Yang,   Nan; McCluskey,   Jill J.; Brady,   Michael P.
The fact that wineries tend to cluster in certain sub-regions can be partially explained by the terroir of those areas.  However, a gap in our understanding of the spatial relationships among wineries remains.  In this article, winery-level data with geographic information system (GIS) coordinates are utilized to examine the spatial relationships among neighboring wineries.  Spatial effects for the California and Washington wine industries are assessed by performing clustering tests based on wine prices and tasting scores.  A spatial lag model is then estimated to test the hypothesis that there are positive effects from neighbors when analyzing the hedonic price equations.  The regression results indicate that there exists strong and positive neighbor...
Tipo: Conference Paper or Presentation
Palavras-chave: GIS; Clustering; Spatial lag model; Wine; Agricultural and Food Policy.
Ano: 2010
URL: http://purl.umn.edu/61172

Is There a Link Between Actual and Perceived Wildfire Danger?
Provedor de dados: 31
Autores: Kaval,   Pamela.
Over the last 20 years, costs for wildfire initial attack in the U.S. have increased significantly. The increased cost relates to wildfire suppression practices as well as the growing number of wildland urban interface (WUI) homes. Requiring WUI residents to pay an annual tax for their wildfire risk would lower costs to the general taxpayer. Willingness-to-pay (WTP) for wildfire prevention, in relation to both perceived and actual wildfire danger, was the focus of this study. Colorado WUI residents had a high awareness of wildfire risk and were willing to pay over $400 annually to reduce this risk. Respondents beliefs about wildfire frequency were comparable to the original natural wildfire regimes of their areas pre-European settlement.
Tipo: Conference Paper or Presentation
Palavras-chave: GIS; Wildfire risk; Stakeholder; Contingent valuation; Colorado; Resource /Energy Economics and Policy; Risk and Uncertainty.
Ano: 2008
URL: http://purl.umn.edu/37090

Microeconomic and Geo-physical Data Integration for Agri-environmental Analysis, Georeferencing FADN Data: A Case Study in Italy
Provedor de dados: 31
Autores: Fais,   Andrea; Nino,   Pasquale; Giampaolo,   Antonio.
The authors, inside a TAPAS action, have developed a methodology - based on the integration between FADN data with statistical, administrative and cartographic information - to improve the production of statistical data related to agricultural policies impact on land and environment. This methodology allows - using Geographic Information System (GIS) technology - to produce and organise data at geographical level. Data spatially referenced respond to the specific needs of agri-environmental analysis and problems, mostly related to specific areas (environmental vulnerability areas), inside defined boundaries (e.g. river basin). The GIS is implemented with several cartographic layers (Topographic and cadastral maps, land use, soils, water sources, climate,...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural statistics; Agri-environment; FADN; GIS; TAPAS; DPSIR; Environmental Economics and Policy; C81; O13; Q21.
Ano: 2005
URL: http://purl.umn.edu/24547

RISK MANAGEMENT POTENTIAL OF PRECISION FARMING TECHNOLOGIES
Provedor de dados: 31
Autores: Lowenberg-DeBoer,   James.
Initial ideas on risk management uses of precision agricultural technology focused on site-specific treatment of problem areas to reduce the probability of low yields and returns. Recent discussions deal with sensor and remote-sensing information to improve marketing and "as applied maps" as trace-back mechanisms to manage liability. A theoretical model is presented that suggests that there are plausible circumstances under which precision farming can reduce temporal yield variability. Empirical evidence from an on-farm trial of site-specific P&amp;K management in the Eastern Cornbelt supports the hypothesis that precision farming can have risk-reducing benefits.
Tipo: Journal Article
Palavras-chave: Food safety; GIS; GPS; Crop insurance; Marketing; Precision farming; Site specific management; Risk; Research and Development/Tech Change/Emerging Technologies; Risk and Uncertainty.
Ano: 1999
URL: http://purl.umn.edu/15366

Diagnosis of the Accelerated Soil Erosion in São Paulo State (Brazil) by the Soil Lifetime Index Methodology
Provedor de dados: 90
Autores: Medeiros,Grasiela de Oliveira Rodrigues; Giarolla,Angelica; Sampaio,Gilvan; Marinho,Mara de Andrade.
ABSTRACT: The soil is a key component of the Earth System, and is currently under high pressure, due to the increasing global demands for food, energy and fiber. Moreover, the management of agricultural systems is often inadequate and ignores the agricultural suitability of lands, and particularly the vulnerability of soils. This paper demonstrates the application of the concept of the Soil Lifetime Index (SLtI) for the entire state of São Paulo, at a spatial resolution of 30 m. The SLtI methodology represents a tolerance criterion and a diagnostic tool to assess the level of soil degradation by water erosion, based on estimated soil loss rates and on an average soil renewal rate. Two approaches were applied to determine: i) the remaining time (years)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil erosion modeling; Soil loss rates; Soil loss tolerance; USLE; GIS.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100552

Estimates of Annual Soil Loss Rates in the State of São Paulo, Brazil
Provedor de dados: 90
Autores: Medeiros,Grasiela de Oliveira Rodrigues; Giarolla,Angelica; Sampaio,Gilvan; Marinho,Mara de Andrade.
ABSTRACT: Soil is a natural resource that has been affected by human pressures beyond its renewal capacity. For this reason, large agricultural areas that were productive have been abandoned due to soil degradation, mainly caused by the erosion process. The objective of this study was to apply the Universal Soil Loss Equation to generate more recent estimates of soil loss rates for the state of São Paulo using a database with information from medium resolution (30 m). The results showed that many areas of the state have high (critical) levels of soil degradation due to the predominance of consolidated human activities, especially in growing sugarcane and pasture use. The average estimated rate of soil loss is 30 Mg ha-1 yr-1 and 59 % of the area of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Erosion; USLE; Soil conservation; GIS; Geoprocessing.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100551

Surface mapping, organic matter and water stocks in peatlands of the Serra do Espinhaço meridional - Brazil
Provedor de dados: 90
Autores: Silva,Márcio Luiz da; Silva,Alexandre Christófaro; Silva,Bárbara Pereira Christófaro; Barral,Uidemar Morais; Soares,Pablo Gomes e Souza; Vidal-Torrado,Pablo.
Peatlands are soil environments that store carbon and large amounts of water, due to their composition (90 % water), low hydraulic conductivity and a sponge-like behavior. It is estimated that peat bogs cover approximately 4.2 % of the Earth's surface and stock 28.4 % of the soil carbon of the planet. Approximately 612 000 ha of peatlands have been mapped in Brazil, but the peat bogs in the Serra do Espinhaço Meridional (SdEM) were not included. The objective of this study was to map the peat bogs of the northern part of the SdEM and estimate the organic matter pools and water volume they stock. The peat bogs were pre-identified and mapped by GIS and remote sensing techniques, using ArcGIS 9.3, ENVI 4.5 and GPS Track Maker Pro software and the maps...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histosols; GIS; Vertical growth rate; Rate of carbon accumulation; Radiocarbon age.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500004

Sugarcane spatial-temporal monitoring and crop coefficient estimation through NDVI
Provedor de dados: 91
Autores: Alface,Angelo B.; Pereira,Silvio B.; Filgueiras,Roberto; Cunha,Fernando F.
ABSTRACT The use of satellite images as a complement in irrigation management constitutes a primordial basis in the decision-making process for irrigated agriculture. In this context, the present study aimed to monitor through Normalized Difference Vegetation Index (NDVI) an irrigated sugarcane field belonging to the Mafambisse company, located at the District of Nhamatanda/Sofala, Republic of Mozambique, and establish its relationship with the crop coefficient established by FAO (kcFAO) and fit a regression model to estimate crop coefficient (kc) from the relationship between NDVI and kcFAO. The study was conducted using a series of Sentinel-2A/MSI images, relative to the period from October 2016 to October 2017. Based on the NDVI images generated, it was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Irrigated agriculture; Geotechnology; GIS.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000500330

Mapping and characterization of intensity in land use by pasture using remote sensing
Provedor de dados: 91
Autores: Calegario,Arthur T.; Pereira,Luis F.; Pereira,Silvio B.; Silva,Laksme N. O. da; Araújo,Uriel L. de; Fernandes Filho,Elpídio I.
ABSTRACT The current demand for food has been met through the exploitation of natural reserves. Brazil has 26% of its extension occupied by agricultural uses, 62% of which are pastures. Degraded pastures have greater land use intensity than well-managed pastures, leading to greater degradation of the environment. Land use classification systems consider that pastures are well managed, a misconception for the Brazilian reality. Based on this approach, it was aimed to develop a methodology for mapping the intensity of land use by pasture via remote sensing. The method of mapping was developed and validated in basins with different soil and climatic characteristics. Three calibrations were performed based on NDVI values to ascertain the influence on the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil and water conservation; GIS; Kappa and weighted kappa indices.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000500352

The integration of GPS, vegetation mapping and GIS in ecological and behavioural studies
Provedor de dados: 96
Autores: Rutter,Steven Mark.
Global Positioning System (GPS) satellite navigation receivers are increasingly being used in ecological and behavioural studies to track the movements of animals in relation to the environments in which they live and forage. Concurrent recording of the animal's foraging behaviour (e.g. from jaw movement recording) allows foraging locations to be determined. By combining the animal GPS movement and foraging data with habitat and vegetation maps using a Geographical Information System (GIS) it is possible to relate animal movement and foraging location to landscape and habitat features and vegetation types. This powerful approach is opening up new opportunities to study the spatial aspects of animal behaviour, especially foraging behaviour, with far greater...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: GIS; GPS; Spatial behaviour; Vegetation mapping.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982007001000007

Methodology for the spatialisation of a reference evapotranspiration from SRTM data
Provedor de dados: 124
Autores: Oliveira,Joaquim Branco de; Arraes,Francisco Dirceu Duarte; Viana,Paula Carneiro.
The aim of this work was to develop a methodology for the spatialisation of mean monthly reference evapotranspiration for the State of Ceará, using the Hargreaves and Samani equation, from estimated air-temperature data based on digital elevation models. The study area is located in northeastern Brazil, between the latitudes 2.5º and 8º South and longitudes 37º and 42º West. The data used in the study are from the network of meteorological stations of the National Institute of Meteorology. The equation proposed by Hargreaves and Samani was used to estimate ET, being spatialised in the form of maps using the Idrisi Andes© software for the manipulation of digital data of latitude, longitude and altitude in order to obtain the variables of the equation. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digital elevation model; Hargreaves and Samani; Air temperature; GIS.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300005

NOTA TÉCNICA: PROGRAMA COMPUTACIONAL PARA ESTIMATIVA DAS TEMPERATURAS DO AR NO NORDESTE BRASILEIRO UTILIZANDO REDES NEURAIS ARTIFICIAIS
Provedor de dados: 107
Autores: Moreira, Michel Castro; Cecílio, Roberto Avelino.
A temperatura do ar é um dos fatores mais importantes que afetam a vegetação e controla os processos ecológicos. O objetivo deste trabalho foi desenvolver um programa computacional utilizando redes neurais artificiais para a estimativa da temperatura do ar no Nordeste do Brasil. As arquiteturas, funções de ativação das redes neurias e os parâmetros livres das redes foram definidos para a construção das funções matemáticas que representassem as redes neurais. As funções matemáticas foram implementadas no programa computacional Borland Delphi© 7 com uma interface gráfica para facilitar o uso das redes. O programa computacional desenvolvido foi intitulado netTemperatura NE e permite de forma fácil e rápida estimar as temperaturas mínima, média e máxima do ar...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Meteorologia Agrícola artificial intelligence; Interpolation; GIS; GTOPO30; Climate modeling.
Ano: 2016
URL: http://www.seer.ufv.br/seer/index.php/reveng/article/view/631

Digital soil mapping using multiple logistic regression on terrain parameters in southern Brazil
Provedor de dados: 63
Autores: Giasson,Elvio; Clarke,Robin Thomas; Inda Junior,Alberto Vasconcellos; Merten,Gustavo Henrique; Tornquist,Carlos Gustavo.
Soil surveys are necessary sources of information for land use planning, but they are not always available. This study proposes the use of multiple logistic regressions on the prediction of occurrence of soil types based on reference areas. From a digitalized soil map and terrain parameters derived from the digital elevation model in ArcView environment, several sets of multiple logistic regressions were defined using statistical software Minitab, establishing relationship between explanatory terrain variables and soil types, using either the original legend or a simplified legend, and using or not stratification of the study area by drainage classes. Terrain parameters, such as elevation, distance to stream, flow accumulation, and topographic wetness...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: GIS; DEM; Soil survey; Terrain analysis.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000300008

Damage caused by capybaras in a corn Field
Provedor de dados: 63
Autores: Ferraz,Katia Maria Paschoaletto Michi de Barros; Lechevalier,Marrie-Anne; Couto,Hilton Thadeu Zarate do; Verdade,Luciano Martins.
Damage caused by capybaras in agroecossystems in Brazil has been frequently observed. The objective of this study was to describe and quantify the actual damage caused by capybaras in a corn field, aiming to get basic information on how, how much, and where these damage occur. Systematic sampling indicated that 26% of the planted area were damaged by capybaras, and the highest percentage of damage occurred on the border of the corn field (t=4.5698, p=0.0001). Damage in areas adjacent to a forest fragment was significantly higher (t=13.6198, p=0.0001), suggesting that the strategy of area utilization for feeding was related to the proximity of the resources "forest" and "water". Avoiding corn plantation in areas adjacent to forest fragments used by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydrochaeris hydrochaeris; GIS; Crop damage; Agroecossystems.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100029

Decision trees for digital soil mapping on subtropical basaltic steeplands
Provedor de dados: 63
Autores: Giasson,Elvio; Sarmento,Eliana Casco; Weber,Eliseu; Flores,Carlos Alberto; Hasenack,Heinrich.
When soil surveys are not available for land use planning activities, digital soil mapping techniques can be of assistance. Soil surveyors can process spatial information faster, to assist in the execution of traditional soil survey or predict the occurrence of soil classes across landscapes. Decision tree techniques were evaluated as tools for predicting the ocurrence of soil classes in basaltic steeplands in South Brazil. Several combinations of types of decicion tree algorithms and number of elements on terminal nodes of trees were compared using soil maps with both original and simplified legends. In general, decision tree analysis was useful for predicting occurrence of soil mapping units. Decision trees with fewer elements on terminal nodes yield...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: GIS; Soil survey; Terrain analysis.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200006

Assessment of heavy metals in soils of a vineyard region with the use of principal component analysis
Provedor de dados: 63
Autores: Valladares,Gustavo Souza; Camargo,Otávio Antônio de; Carvalho,José Ruy Porto de; Silva,Alessandra Maria Cia.
Agricultural management with chemicals may contaminate the soil with heavy metals. The objective of this study was to apply Principal Component Analysis and geoprocessing techniques to identify the origin of the metals Cu, Fe, Mn, Zn, Ni, Pb, Cr and Cd as potential contaminants of agricultural soils. The study was developed in an area of vineyard cultivation in the State of São Paulo, Brazil. Soil samples were collected and GPS located under different uses and coverings. The metal concentrations in the soils were determined using the DTPA method. The Cu and Zn content was considered high in most of the samples, and was larger in the areas cultivated with vineyards that had been under the application of fungicides for several decades. The concentrations of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: PCA; GIS; Soil pollution; Copper; Zinc.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000300011

Modelling air temperature for the state of São Paulo, Brazil
Provedor de dados: 63
Autores: Rodríguez-Lado,Luis; Sparovek,Gerd; Vidal-Torrado,Pablo; Dourado-Neto,Durval; Macías-Vázquez,Felipe.
Spatial modelling of air temperature (maximum, mean and minimum) of the State of São Paulo (Brazil) was calculated by multiple regression analysis and ordinary kriging. Climatic data (mean values of five or more years) were obtained from 256 meteorological stations distributed uniformly over the State. The correlation between the climatic dependent variables, with latitude and altitude as independent variables was significant and could explain most of the spatial variability. The coefficients of determination (P &lt; 0.05) varied in the range of 0.924 and 0.953, showing that multiple regression analysis is an accurate method for the modelling of air temperature for the State of São Paulo. Finally, these regression equations were used together with the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DEM; GIS; Multiple regression analysis; Kriging; Climate modelling.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000500002

การศึกษาความแปรปรวนของช่วงฤดูฝนในภาคตะวันออกเฉียงเหนือ
Provedor de dados: 106
Autores: Suppachai Atichart; Naruatai Worasatit; Rapeeporn Srisathit; Kuson Thomma.
Uncertainty of the beginning and the end of rainy season which is a result of climate changes from global warming can have a great impact on plant production. This is particularly clear in the Northeast which is mainly rain-fed agriculture. The Office of Agricultural Research and Development Region 3, therefore, studied variation of the beginning and the end of rainy season of the Northeast using rainfall data from Meteorological Station from the year 1981 - 2010, 30 years in total. The data was imported and analyzed using MS Access 2000 and compared to the five-year assessment of spatial data. The analysis of variance was analyzed based on the standard deviation of around 30 years period and spatial mapping was conducted in ArcGIS V9.3. The results showed...
Tipo: PhysicalObject
Palavras-chave: Rainy season; Climate change; Variability characteristics; Variation; Geographic information systems; GIS; Mapping; Cropping system; ฤดูกาล; ฤดูฝน; การเปลี่ยนแปลงสภาพภูมิอากาศ; ลักษณะความแปรปรวน; ระบบสารสนเทศภูมิศาสตร์; การทำแผนที่; ปริมาณน้ำฝน; รูปแบบการปลูกพืช.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5782

ความน่าเชื่อถือและการประเมินศักยภาพของแบบจำลอง i_EPEC ในการประเมินการผลิตข้าวของประเทศไทย
Provedor de dados: 106
Autores: Noppol Arunrat; Nardsuda Phoomjamnong.
Interactive EnvironmentalPolicy Impact Calculator (i_EPIC) model is an important tool for future agriculture and food security in Thailand. Its application requires both the identification of errors and the assessment of reliability and potential of the i_EPIC model and GIS technique in simulating rice yields. Rice yields estimated by EPIC (version 0509) were compared with agricultural statistics reports from Thailand’s Office of Agricultural Economics (OAE), Ministry of Agriculture and Cooperatives (MOAC). Validation of rice yield data proved to be satisfactory: the mean relative error (MRE %) for major rice (rainy season) being 11.77, mean absolute error (MAE %) 1.22 and root mean square error (RMSE %) 43.06. The corresponding errors for second rice (dry...
Tipo: Collection
Palavras-chave: Rice; EPIC0509; I_EPIC model; GIS; Thailand; ข้าว; ระบบสารสนเทศทางภูมิศาสตร์; การประมาณการผลผลิต; แบบจำลอง; ประสิทธิภาพการทำงาน; ความน่าเชื่อถือ; ประเทศไทย.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5325

การจัดเขตศักยภาพการปลูกข้าวของประเทศไทย: ทางเลือก โอกาส และความท้าทาย
Provedor de dados: 106
Autores: Chitnucha Buddhaboon; Benjamas Rossopa; Piyaphan Srikum; Sommai Lertna; Waraporn Vongboon; Nopadon Prayoonsook; Duangporn Witoonjit; Yupin Rammanee; Kingkaew Kunket.
Zoning of rice production potential in Thai rice area has been conducted from 2000 to 2013. The objectives of the project were 1) to define the potential of rice area in Thailand in term of soil suitability and productivity, 2) to create map of rice production zoning with appropriate recommendation. Methodology to run the project consisted of secondary data collection, field survey, crop cutting, field experiment, and mapping. The research found that total of 12.6 M ha of rice areas in Thailand it was suitable for rice production about  8.2 M ha. Rice soil was more fertile in the central plain as compared to other region. Most of the farmer grew recommended rice varieties. There were three major groups of growing rice variety, jasmine rice, white rice, and...
Tipo: PhysicalObject
Palavras-chave: Rice; Zoning area; Rice production; Alternative; Land capability; Agricultural potential; Land use; Production technology; Soil fertility; GIS; ข้าว; พื้นที่การจัดเขต; การผลิตข้าว; ศักยภาพการผลิต; การทำแผนที่; การใช้ที่ดิน; ความอุดมสมบูรณ์ของดิน; เทคโนโลยีการผลิต; ข้าวหอม; ข้าวขาว; ข้าวเหนียว; การเพิ่มผลผลิต.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5709

การวิเคราะห์ความเสี่ยงในการปลูกข้าวนาน้ำฝนโดยใช้ระบบสารสนเทศภูมิศาสตร์และแบบจำลองการเจริญเติบโตของพืช
Provedor de dados: 106
Autores: Surajit Phuphak; Bas Bouman.
Risk due to rainfall variability is crucial in rainfed rice growing areas in the NE Thailand therefore analysis on risk coping of the farmers is importance. This research had evaluated the yield of KDML105 rice variety using a knowledge-based system approach, subject to rainfall uncertainty in 6 different kinds of paddies that related to soil and hydrological variability, with 4 scenarios of sowing times and 2 sowing methods in a watershed area of Ubon Ratchathani province. A GIS and a rice growth simulation model, ORYZA2000, tools were used with stochastic efficiency rule to analyze risk. The results showed that KDML105 yield was sensitive to rainfall variability, sowing times and sowing methods rather than variability of soil and hydrology which related...
Tipo: Collection
Palavras-chave: Risk analysis; Rainfed rice production; Crop growth simulation model; GIS; ORYZA2000; KDML 105; Yield; ข้าว; การปลูกข้าวนาน้ำฝน; แบบจำลองการเจริญเติบโต; จีไอเอส; ORYZA2000; พันธุ์ขาวดอกมะลิ 105; ผลผลิต; การวิเคราะห์ความเสี่ยง.
Ano: 2008
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5102

การประยุกต์ใช้ภาพถ่ายดาวเทียมธีออสเพื่อประเมินเนื้อที่ปลูกข้าวนาปี ในจังหวัดเชียงรายและแม่ฮ่องสอน
Provedor de dados: 106
Autores: Piyapan Srikoom; Amornrat Intrmun; Nong-Nouch Pradit; Kingkaew Kunket.
In the Upper North of Thailand, the biggest wet season rice area is Chiang Rai province whereas the smallest is Mae Hong Son. In each year the rice area data from each organizes are different. Application of geographic information technologies by translating THEOS satellite image is one of channel for the classification of rice-growing areas of the two provinces. It can be use to predict the rice yield as well as use for the data base for rice research in Chiang Rai and also rice production for food security forecast of Mae Hong Son province. The implementation of Chiang Rai rice growing area is total 1,245,342 rais, with quite similar to the statistic data from the Bureau of Agricultural Economics in 2010 with amount of 1,261.022 rais, both different in...
Tipo: PhysicalObject
Palavras-chave: Wet season rice; Satellite image; THEOS satellite; GIS; Chiang Rai province; Mae Hong Son province; ข้าวนาปี; ภาพถ่ายดาวเทียม; ดาวเทียมธีออส; ระบบสารสนเทศทางภูมิศาสตร์; พื้นที่ปลูกข้าว; ผลผลิต; การพยากรณ์; จ.เชียงราย; จ.แม่ฮ่องสอน.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5611

โครงการการใช้เทคโนโลยีการสำรวจระยะไกลเพื่อใช้เป็นข้อมูลในการสำรวจพื้นที่ปลูกข้าว และการประกันภัยพืชผลในประเทศไทย
Provedor de dados: 106
Autores: Amornrat Intrman; Sommai Lerthna; Nelson, Andrew; Setiyono, Tri Deri; Holecz, Francesco; Barbieri, Massimo.
The Remote Sensing-based Information and Insurance for Crops in Emerging Economics (RIICE) is a project to find ways of helping Asian countries are faced with a natural disaster. Especially floods and droughts caused by the cooperation of the three organizations, namely International Research Institute (IRRI), SARMAP and Rice Department. By the year 2013-2015 in the area of responsibility of Suphan Buri Rice Research Center. Nakhon Ratchasrima Rice Research Center and the objecttive of the project is to reduce vulnerability of smallholders in rice production through better and cheaper information systems on crop growth which will in turn lead to applications such as micro-insurance schemes. On the long run rice production should have increased, thanks to...
Tipo: PhysicalObject
Palavras-chave: Remote sensing; Crop insurance; Rice production; GIS; Landsat; Rice; ข้าว; การประกันภัยพืชผล; การผลิตข้าว; ระบบสารสนเทศภูมิศาสตร์; ภาพถ่ายดาวเทียม; การสำรวจระยะไกล.
Ano: 2014
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5644

Informatização de coleções utilizando um sistema de informações geográficas (SIG): um protótipo desenvolvido para a coleção de lepidoptera do Departamento de Zoologia da Universidade Federal do Paraná
Provedor de dados: 104
Autores: Dutra,Renato Roxo Coutinho; Araújo,Marcelo Antunes.
The purpose of this paper is to present a prototype, which was developed using an ARC/INFO software, for the informatization of Butterflies' Collection of the "Departamento de Zoologia da Universidade Federal do Paraná".
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Collection; Informatization; Geographic Information System; GIS.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000200013

Agricultural land use and cover change in the Cerrado/Amazon ecotone: A case study of the upper Teles Pires River basin
Provedor de dados: 36
Autores: ZAIATZ,Ana Paula Sousa Rodrigues; ZOLIN,Cornélio Alberto; VENDRUSCULO,Laurimar Goncalves; LOPES,Tarcio Rocha; PAULINO,Janaina.
ABSTRACT The upper Teles Pires River basin is a key hydrological resource for the state of Mato Grosso, but has suffered rapid land use and cover change. The basin includes areas of Cerrado biome, as well as transitional areas between the Amazon and Cerrado vegetation types, with intensive large-scale agriculture widely-spread throughout the region. The objective of this study was to explore the spatial and temporal dynamics of land use and cover change from 1986 to 2014 in the upper Teles Pires basin using remote sensing and GIS techniques. TM (Thematic Mapper) and TIRS (Thermal Infrared Sensor) sensor images aboard the Landsat 5 and Landsat 8, respectively, were employed for supervised classification using the “Classification Workflow” in ENVI 5.0. To...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon Basin; Remote sensing; GIS; Territorial management.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000200168

Forest road network planning for biomass exploitation and fire preventions: a least cost path analysis
Provedor de dados: 111
Autores: Liampas, Sarantis-Angelos; Stamatiou, Christos; Drosos, Vasileios.
The projects related to forest opening up constitute fundamental infrastructure projects for the development of our mountainous and semi-mountainous national economy. In the beginning, timber transportation and connection between forest settlements served as the sole purpose of forest opening up. However, nowadays, the perspective of forest opening up as being an important preventive measure of forest protection, which is a basic pillar of a multipurpose forestry system of the Greek Mediterranean mountains, is gaining ground. The application of modern tools in the opening up is now imperative for choosing the most economical and efficient forestry route. The paper presents a method of opening up roads in the forest, using the least cost path analysis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Least cost path analysis; Multi-Criteria Analysis; Forest Opening Up; Analytic Hierarchy Process; GIS; Greece.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5385

Development of an information system for the traceability of citrus-plant nursery chain related to the Italian National Service for Voluntary Certification
Provedor de dados: 111
Autores: Porto, Simona M. C.; Arcidiacono, Claudia; Anguzza, Umberto; Cascone, Giovanni.
Abstract: At present, the production of certified plants in Italy, which is obtained by using propagating materials verified in terms of varietal trueness-to-type and phytosanitary condition, is guaranteed by the National Service for Voluntary Certification.  The monitoring of productions and activities that are carried out in the centres established by the National Service for Voluntary Certification is crucial for the identification of both possible sources of disease risk and the destination of the propagating materials.  In previous studies a methodology was proposed and applied to carry out the requirements analysis and specification for the development of an integrated computer-based information system for certified citrus-plant traceability.  This...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Engineering certification; Citrus plant nursery chain; GIS; Information system; Plant pest risk management; Relational model; Traceability.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2707

Assessment of the suitability of land use for agriculture by analytical hierarchy process : AHP in lower Prachinburi watershed, eastern Thailand
Provedor de dados: 111
Autores: Rukanee, Duangthip; Sangchan, Songvoot; Choomjaihan, Prasan.
       The low Prachinburi watershed is a gateway to other regions of the country.  Due to a rapid increase in population there, there is also an increase in agricultural production area.  This study aims to assess the appropriateness of land use by using analytical hierarchy process (AHP) for land use planning.            Results of the study revealed that there is a moderate level of the appropriateness in land use development.  The most appropriate area (S1) accounts for 22.07 percent; the moderately appropriate area (S2) accounts for 54.15 percent; the lowly appropriate area (S3) accounts for 10.25 percent; and the inappropriate area accounts 13.52 percent of the area.  Regarding a guideline for agricultural area management, it is found to be mostly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Land suitability; Analytical hierarchy process; Watershed; Assessment; GIS.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5751

GIS-BASED SYSTEM ANALYSIS FOR WASTE BIN LOCATION IN ENUGU MUNICIPALITY
Provedor de dados: 111
Autores: Ugwuishiwu, Bonificae Obinwanne; NWOKE, OJI ACHUKA; Okechukwu, Chibueze Henry; Echiegu, Emmanuel Amagu.
Waste collection in Enugu has been a major challenge requiring urgent attention. The aim of the work therefore was to study with GIS the management of the existing bin distribution and collection system in order to determine the optimal frequency for waste collection. The methods adopted include questionnaires, oral interviews and field observations to determine the state of waste collection. Waste collection points both legal and illegal dumpsites were identified using handheld GPS and the points were incorporated into a map using Arc GIS 10.2 software. A total of 177 dumpsite locations were discovered during the study. Illegal dumpsites were 35 in number sand legal dumpsites instituted by ESWAMA were 142. Out of the 142 authorized dumpsites, 55 dumpsites...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dumpsites; Bin Location; GIS; GPS; Solid waste; Collection; System analysis.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5698

Uncertainties Associated with Arithmetic Map Operations in GIS
Provedor de dados: 42
Autores: YAMAMOTO,JORGE K.; KIKUDA,ANTÔNIO T.; RAMPAZZO,GUILHERME J.; LEITE,CLAUDIO B.B.
Abstract Arithmetic map operations are very common procedures used in GIS to combine raster maps resulting in a new and improved raster map. It is essential that this new map be accompanied by an assessment of uncertainty. This paper shows how we can calculate the uncertainty of the resulting map after performing some arithmetic operation. Actually, the propagation of uncertainty depends on a reliable measurement of the local accuracy and local covariance, as well. In this sense, the use of the interpolation variance is proposed because it takes into account both data configuration and data values. Taylor series expansion is used to derive the mean and variance of the function defined by an arithmetic operation. We show exact results for means and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: GIS; Interpolation variance; Map Algebra; Propagation of Uncertainty; Taylor series.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502025

Fluoride characterization by principal component analysis in the hydrochemical facies of Serra Geral Aquifer System in Southern Brazil
Provedor de dados: 42
Autores: Nanni,Arthur; Roisenberg,Ari; Fachel,Jandyra M.G.; Mesquita,Gilberto; Danieli,Cristiano.
Principal component analysis is applied to 309 groundwater chemical data information from wells in the Serra Geral Aquifer System. Correlations among seven hydrochemical parameters are statistically examined. A four-component model is suggested and explains 81% of total variance. Component 1 represents calcium-magnesium bicarbonated groundwaters with long time of residence. Component 2 represents sulfated and chlorinated calcium and sodium groundwaters; Component 3 represents sodium bicarbonated groundwaters; and Component 4 is characterized by sodium sulfated with high fluoride facies. The components' spatial distribution shows high fluoride concentration along analyzed tectonic fault system and aligned on northeast direction in other areas, suggesting...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fractured aquifer; Geostatistics; GIS; Groundwater; Hydrogeology.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000400010

Spatial Distribution of Euschistus heros (Hemiptera: Pentatomidae) in Cotton (Gossypium hirsutum Linnaeus)
Provedor de dados: 42
Autores: WEBER,ANDERSON C.; DEGRANDE,PAULO E.; SOUZA,ELLEN P. DE; AZAMBUJA,ROSALIA; FERNANDES,MARCOS G.
Abstract Recently, the Neotropical brown stink bug, Euschistus heros (Pentatomidae: Hemiptera), has been detected in cotton in the Brazilian Cerrado. Several reliable surveys have been conducted on the spatial distribution of stink bugs in soybean; however, few studies have examined the behavior of this insect in cotton in Brazil. Thus, this study examined the spatial distribution of E. heros in cotton using aggregation indices based on the variance-to-mean ratio, Morisita index, exponent k, Poisson and negative binomial distributions. Inverse Distance Weighting interpolation maps were also used to represent insect density. The study was conducted in a 1.1 hectare experimental cotton field in which 64 equally-sized plots were sampled on a weekly basis. Our...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aggregation Indices; Dispersion; GIS; IPM; Negative Binomial.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703483

An entomological surveillance system based on open spatial information for participative dengue control
Provedor de dados: 42
Autores: Regis,Leda; Souza,Wayner V.; Furtado,André F.; Fonseca,Cláudio D.; Silveira Jr.,José C.; Ribeiro Jr.,Paulo J.; Melo-Santos,Maria Alice V.; Carvalho,Marilia S.; Monteiro,Antonio M.V.
Aedes aegypti is a very efficient disseminator of human pathogens. This condition is the result of evolutionary adaptations to frequent haematophagy, as well as to the colonization of countless types of habitats associated with environmental and cultural factors that favor the proliferation of this mosquito in urban ecosystems. Studies using sensitive methods of monitoring demonstrate that the methods of surveillance used in the Brazilian program do not show the high degrees of the infestation of cities by this vector. To increase the capacity of the health sector, new tools are needed to the practice of surveillance, which incorporate aspects of the vector, place and human population. We describe here the SMCP-Aedes - Monitoring System and Population...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dengue vector; Entomological surveillance; Ovitraps; GIS; Vector control.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000400004

Evaluation of space adequateness of shrimp farms in Southern Brazil
Provedor de dados: 42
Autores: Freitas,Rodrigo R.; Hartmann,Carlos; Tagliani,Paulo R. A.; Poersch,Luís H.
In Rio Grande do Sul State, there are four marine shrimp (Litopenaeus vannamei) farms in the municipal districts of São José do Norte and Rio Grande, and other four with previous license for operation. Thus, the present study aimed to identify and characterize areas for marine shrimp farming located in the Southern portion of the Patos Lagoon estuary (32º00'S 52º00'W) by employing the analysis of satellite remote sensing (Landsat TM and ETM+/Google Earth), airborne remote sensing (35mm system ADAR 1000), terrestrial remote sensing (RICOH 500SE), and field expeditions, integrating data in a Geographical Information System (IDRISI Andes). As a result, the enterprises were built on coastal fields or in obliterated dune areas, which are favorable for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Costal management; GIS; Patos Lagoon; Shrimp farms.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300025

Environmental analysis and zoning for an urban park management purpose
Provedor de dados: 52
Autores: Zanin,Elisabete Maria; Santos,José Eduardo dos; Henke-Oliveira,Carlos.
Environmental analysis and zoning were carried out for management purpose of the Longines Malinowski Municipal Park (LMMP). With an area of 24.85 ha, this urban park includes a patch of sub-tropical humid forest, completely surrounded by residential and commercial areas in the City of Erechim, Rio Grande do Sul State,Brazil. Landscape features derived from aerophotogrametric maps, based on the use of Geographical Information Systems (GIS-IDRISI), resulted in several thematic maps, through which a proposal of environmental zoning was perfomed, observing the definition of five zones of use. The environmental diagnosis identified several types of activities potentially harmful to the biodiversity of the LMMP and city's environmental quality. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Urban green area; Quality of life; GIS.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000500018

A methodological proposal for quantifying environmental compensation through the spatial analysis of vulnerability indicators
Provedor de dados: 52
Autores: Torresan,Fabio Enrique; Lorandi,Reinaldo.
The aim of this work was to propose a methodology for quantifying the environmental compensation through the spatial analysis of vulnerability indicators. A case study was applied for the analysis of sand extraction enterprises, in the region of Descalvado and Analândia, inland of São Paulo State, Brazil. Environmental vulnerability scores were attributed for the indicators related to erosion, hydrological resources and biodiversity loss. This methodological proposal allowed analyzing the local alternatives of certain enterprise with the objective of reducing impacts and at the same time reducing the costs of environmental compensation. The application of the methodology significantly reduced the subjectivity degree usually associated to the most of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental compensation; Environmental impact assessment; GIS; Landscape ecology; Sand mining.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300026

Topoclimatic Modeling of Thermopluviometric Variables for the Bío Bío and La Araucanía Regions, Chile
Provedor de dados: 117
Autores: Díaz M,Diego; Morales S,Luis; Castellaro G,Giorgio; Neira R,Fernando.
Climatic mapping in the Bío Bío and La Araucanía Regions of Chile is primarily in analog form (paper) and delineation of contours, making it unsuitable for digital handling by geographic information systems (GIS). Therefore, in this study, topoclimatic models were created and spatially represented to explain the spatial and temporal variation of monthly mean temperature and precipitation, as a function of variability and singularity of the physiographic characteristics of the Bío Bío and La Araucanía Regions. The physiographic factors considered were latitude, longitude, altitude, aspect and distance to coastline. To elaborate equations, data from thermopluviometric stations of the study area were compiled and systematized. These stations were standardized...
Tipo: Journal article
Palavras-chave: Topoclimatic models; Mean temperature; Mean precipitation; Pluviometric cartographic; GIS; Topoclimáticos; Temperaturas medias; Precipitaciones medias; Cartografía termopluviométrica; SIG.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000400011

Soil erosion by water estimated for 99 Uruguayan basins
Provedor de dados: 118
Autores: Carrasco-Letelier,Leonidas; Beretta-Blanco,Andrés.
Abstract Soil erosion can be accelerated by agricultural intensification, and the soil loss can alter the quality of water bodies. Sustainable agricultural production therefore requires the management of erosion and potential water pollution. In Uruguay, where there is heavy use of soil for agriculture, there is a need to continually develop and update erosion management policies. In this framework, we estimated the erosion in 99 drainage basins by analyzing and managing the information required (K, L, S, C and R-factors) in the universal soil loss equation (USLE) and the revised universal soil loss equation (RUSLE) in a geographical information system (GIS). The studied drainage basins encompass 73% of the area of Uruguay. The results include the...
Tipo: Journal article
Palavras-chave: Erosion; GIS; RUSLE; USLE; Watersheds.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000200184

Estimation of soil erosionability in the stream basin of Pillahuinco Grande, Province of Buenos Aires, Argentina
Provedor de dados: 118
Autores: Gaspari,Fernanda J; Rodríguez Vagaría,Alfonso M; Senisterra,Gabriela E.
In a hydrographic watershed, the erosionability (K factor) of the soil evaluation depends on the technical resources, developed applied sciences, and spatial technology available. For the determination of erosionability in the watershed of Pillahuinco Grande s Creek (Argentina) (38°S, 61°15'W), the Universal Soil Loss Equation (USLE) was used by applying a geographic information system (GIS) for the cartographic evaluation. A database of geological, environmental, and soil associations was developed, which indicated that geomorphologic variability, caused by geology and soil, significantly determines the spatial variation of the K factor values, in a range from 0.02 to 0.69 ((t·m²·h)·(ha·J·cm)-1). A new quantification was determined with the simplified K...
Tipo: Journal article
Palavras-chave: GIS; Soil; Soil erosion; USLE; Watershed.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100003

Soil erosion vulnerability in the verde river basin, southern minas gerais
Provedor de dados: 64
Autores: Oliveira,Vinícius Augusto de; Mello,Carlos Rogério de; Durães,Matheus Fonseca; Silva,Antônio Marciano da.
Soil erosion is one of the most significant environmental degradation processes. Mapping and assessment of soil erosion vulnerability is an important tool for planning and management of the natural resources. The objective of the present study was to apply the Revised Universal Soil Loss Equation (RUSLE) using GIS tools to the Verde River Basin (VRB), southern Minas Gerais, in order to assess soil erosion vulnerability. A annual rainfall erosivity map was derived from the geographical model adjusted for Southeastern Brazil, calculating an annual value for each pixel. The maps of soil erodibility (K), topographic factor (LS), and use and management of soils (C) were developed from soils and their uses map and the digital elevation model (DEM) developed for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Revised Universal Soil Loss Equation (RUSLE); GIS; Erosion; Basin management.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000300006

Detailed soil survey of an experimental watershed representative of the Brazilian Coastal Plains and its practical application
Provedor de dados: 64
Autores: Santos,Walbert Júnior Reis dos; Curi,Nilton; Silva,Sérgio Henrique Godinho; Fonseca,Sebastião da; Silva,Elidiane da; Marques,João José.
This paper presents a detailed soil survey of an experimental watershed with representative pedoclimatic characteristics of the Coastal Plains in Espírito Santo State and its practical applications. For the pedological survey, 35 observation sites and three soil profiles were sampled and described, which were morphologically characterized and subjected to physical (particle size) and chemical analyses (routine and sulfuric acid digestion). The soil map was made using the geographic information system ArcGIS 9.3. This GIS software was also used to generate the digital elevation model (DEM) for identifying the slope classes. SAGA software was used to calculate the topographic wetness index (WI) which aided in a more accurate separation of Haplic Organosol...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil map; Geoprocessing; GIS.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000100006

Spatial distribution of water erosion risk in a watershed with eucalyptus and Atlantic Forest
Provedor de dados: 64
Autores: Avanzi,Junior Cesar; Silva,Marx Leandro Naves; Curi,Nilton; Norton,Lloyd Darrell; Beskow,Samuel; Martins,Sérgio Gualberto.
The process of water erosion occurs in watersheds throughout the world and it is strongly affected by anthropogenic influences. Thus, the knowledge of these processes is extremely necessary for planning of conservation efforts. This study was performed in an experimental forested watershed in order to predict the average potential annual soil loss by water erosion using the Universal Soil Loss Equation (USLE) and a Geographic Information System (GIS), and then compared with soil loss tolerance. All the USLE factors were generated in a distributed approach employing a GIS tool. The layers were multiplied in the GIS framework in order to predict soil erosion rates. Results showed that the average soil loss was 6.2 Mg ha-1 yr-1. Relative to soil loss...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest systems; Soil losses; USLE; GIS; Coastal plain.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000500006