Consulta: subjectFacets:"Watershed"
Registros recuperados: 60
Data/hora: 13/06/2024 05:23:32

Planificación para el uso integral de los recursos: El caso subcuenca del río Ciruelas en Costa Rica.
Provedor de dados: 32
Autores: Zúñiga Meléndez, Joselyn.
La falta de planeación en el manejo de las cuencas y subcuencas deriva en impactos ambientales negativos, afectando, no solo, los sistemas bióticos, sino también el bienestar de la población. En este sentido, esta investigación, presenta un diagnóstico y una propuesta de manejo integral de la subcuenca río Ciruelas. En la que se exponen las características tanto físico geográficas, como socio culturales que forman parte de esta subcuenca. Al conceptualizar a la subcuenca como un sistema, permite entender que existe una relación sociedad-naturaleza, la cual es vital para lograr equiparar o mitigar los efectos negativos en materia ambiental, social y económica que trae consigo el inadecuado manejo de los recursos. En el análisis de la subcuenca se parte del...
Palavras-chave: Cuenca hidrográfica; Subcuenca; Manejo integral sobre uso y conflicto de uso del suelo; Zonificación; Planificación; Watershed; Integral management on use and land use conflict; Zoning; Planning; Maestría Tecnológica; EDAR; Gestión del Desarrollo del Territorio Rural.
Ano: 2011
URL: http://hdl.handle.net/10521/348

Planificación para el uso integral de los recursos: El caso subcuenca del río Ciruelas en Costa Rica.
Provedor de dados: 32
Autores: Zúñiga Meléndez, Joselyn.
La falta de planeación en el manejo de las cuencas y subcuencas deriva en impactos ambientales negativos, afectando, no solo, los sistemas bióticos, sino también el bienestar de la población. En este sentido, esta investigación, presenta un diagnóstico y una propuesta de manejo integral de la subcuenca río Ciruelas. En la que se exponen las características tanto físico geográficas, como socio culturales que forman parte de esta subcuenca. Al conceptualizar a la subcuenca como un sistema, permite entender que existe una relación sociedad-naturaleza, la cual es vital para lograr equiparar o mitigar los efectos negativos en materia ambiental, social y económica que trae consigo el inadecuado manejo de los recursos. En el análisis de la subcuenca se parte del...
Palavras-chave: Cuenca hidrográfica; Subcuenca; Manejo integral sobre uso y conflicto de uso del suelo; Zonificación; Planificación; Watershed; Integral management on use and land use conflict; Zoning; Planning; Maestría Tecnológica; EDAR; Gestión del Desarrollo del Territorio Rural.
Ano: 2011
URL: http://hdl.handle.net/10521/348

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

Can Payments for Ecosystem Services Contribute to Adaptation to Climate Change? Insights from a Watershed in Kenya
Provedor de dados: 7
Autores: Mwangi, John K.; Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya; PhD Fellow, World Agroforestry Centre (ICRAF), Nairobi, Kenya ; joymwa86@yahoo.com; Namirembe, Sara; World Agroforestry Centre (ICRAF), Nairobi, Kenya ; s.namirembe@cgiar.org.
Climate change presents new challenges for the management of social-ecological systems and the ecosystem services they provide. Although the instrument of payments for ecosystem services (PES) has emerged as a promising tool to safeguard or enhance the provision of ecosystem services (ES), little attention has been paid to the potential role of PES in climate change adaptation. As an external stressor climate change has an impact on the social-ecological system in which PES takes place, including the various actors taking part in the PES scheme. Following a short description of the conceptual link between PES and adaptation to climate change, we provide practical insights into the relationship between PES and adaptation to climate change by presenting...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptation; Climate change; Climate variability; Payments for ecosystem services; Watershed.
Ano: 2014

Responses of Emergent Marsh Wetlands in Upstate New York to Variations in Urban Typology
Provedor de dados: 7
Autores: Kleppel, G. S.; Department of Biological Sciences, University at Albany, SUNY; gkleppel@csc.albany.edu; Madewell, Shirley A; Department of Biological Sciences, University at Albany, SUNY; madewell@mail.com; Hazzard, Sarah E; Department of Biological Sciences, University at Albany, SUNY; hazzads@ecostudies.org.
Although it has been repeatedly demonstrated that urbanization has negative environmental consequences, the conversion of land to urban use is increasing worldwide and is not likely to abate. We tested the hypothesis that different urban typologies, i.e., distributions of human population and infrastructure, differentially influence the water quality and ecological functionality of emergent marsh wetlands in New York State's Hudson River Valley. Wetlands were studied in two watersheds, defined as landscapes bounded by ridge lines, containing traditional small-town development and two watersheds containing suburban typologies. Land cover attributes were evaluated by analyzing ground-truthed, orthophotoquad data with a GIS. Water quality, the cover and...
Tipo: Peer-Reviewed Reports
Palavras-chave: Hudson River Valley; New York State; Buffers; Land use; Small towns; Suburbs; Trophic transfer efficiency; Urban typology; Urbanization; Water quality; Watershed; Wetlands.
Ano: 2004

Poverty and Environmental Services: Case Study in Way Besai Watershed, Lampung Province, Indonesia
Provedor de dados: 7
Autores: Suyanto, S.; World Agroforestry Centre (ICRAF); suyanto@cgiar.org; Khususiyah, Noviana; World Agroforestry Centre (ICRAF); Nkhususiyah@cgiar.org; Leimona, Beria; World Agroforestry Centre (ICRAF); lberia@cgiar.org.
Tipo: Peer-Reviewed Reports
Palavras-chave: Coffee trees; Agroforestry; Environmental services; Equity; Poverty; Payment for environmental services; Watershed; Lampung Province; Indonesia.
Ano: 2007

Food Sources and Accessibility and Waste Disposal Patterns across an Urban Tropical Watershed: Implications for the Flow of Materials and Energy
Provedor de dados: 7
Autores: Garcia-Montiel, Diana C.; Institute For Tropical Ecosystem Studies; dgarcia@ites.upr.edu.
Tipo: Peer-Reviewed Reports
Palavras-chave: Household; Nutrient cycling; San Juan ULTRA; Social-ecological systems; Urban biogeochemistry; Urban ecology; Urban metabolism; Watershed.
Ano: 2014

Conservation of ecosystem services in high-altitude Andean wetlands: social participation in the creation of a natural protected area
Provedor de dados: 67
Autores: Rubio,María Clara; Rubio,Cecilia; Salomón,Mario; Abraham,Elena.
The goal of the present work is to synthesize the process of collective construction developed to protect the high-altitude wetlands of the Blanco River basin, located in the Andes Mountains, Province of Mendoza. The participatory process arose out of an initiative of basin residents and users, and was conducted by the Integrative Committee for Creation of Potrerillos Municipal Environmental Protected Area (MEPA), composed of civil society organizations, government agencies and scientific institutions. The major pressures affecting the wetlands, identified through participatory assessment of the socio-ecosystem are: water pollution, reduction and total loss of habitat, stoppage of groundwater flows, artificial drainage, poldering of the meadow, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Community conservation strategy; Assessment; Benefciaries; Mapping; High Andes; Land use; Watershed; Land-use planning.
Ano: 2017
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2017000200008

Turbidimetry as an alternative method to determine the rating curve of suspended sediments
Provedor de dados: 70
Autores: Poletto,Kayla; Sampaio,Silvio C.; Queiroz,Manoel M. F. de; Gomes,Benedito M.; Soncela,Rosimaldo.
Understanding hydrosedimental behavior of a watershed is essential for properly managing and using its hydric resources. The objective of this study was to verify the feasibility of the alternative procedure for the indirect determination of the sediment key curve using a turbidimeter. The research was carried out on the São Francisco Falso River, which is situated in the west of the state of Paraná on the left bank of ITAIPU reservoir. The direct method was applied using a DH-48 sediment suspended sampler. The indirect method consisted of the use of a linigraph and a turbidimeter. Based on the results obtained, it was concluded that the indirect method using a turbidimeter showed to be fully feasible, since it gave a power function-type mathematical model...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Watershed; Hydrosedimentalogy; Agriculture.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000300019

Analysis of land use and occupancy in permanent preservation areas according to the hydrography of Ribeirão Água Fria - Bofete, SP - Brazil
Provedor de dados: 70
Autores: Nardini,Rafael C.; Campos,Sérgio; Gomes,Luciano N.; Moreira,Katiuscia F.; Piza,Mariana W. de T.
The use conflicts are determined by the inadequate occupations of the soil, as it is the case of soil occupation inside of permanent preservation areas. This study aimed to determine the classes of the soil use and if there are conflicts inside of permanent preservation areas along the drainage network of the Água Fria Stream watershed, located in Bofete city - São Paulo, Brazil. It locates geographically between the coordinates: 48°09'30" to 48°18'30" longitude WGr., 22°58'30" to 23°04'30" latitude S, with an area of 15242.84 ha. The map of soil use was elaborated through the interpretation directly in the computer screen of satellite digital image. In the orbital data, the study area is inserted in the quadrant A, of image TM/Landsat - 5, orbit 220,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Watershed; Geographic information systems; Soil use.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000500013

Agricultura e recursos hídricos em bacias hidrográficas de diferentes biomas brasileiros: Rede AgroHidro.
Provedor de dados: 14
Autores: RODRIGUES, L. N.
bitstream/item/75718/1/art-053.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Mudanças climáticas; Water source; Watershed; Climatic change.; Agricultura; Recurso Hídrico.; Brazil.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/875123

Mudanças no regime hidrológico da bacia hidrográfica do Rio Taquari-Pantanal.
Provedor de dados: 14
Autores: GALDINO, S.; PADOVANI, C. R.; SORIANO, B. M. A.; VIEIRA, L. M.
A inundação de 11.000 km2 no Pantanal, iniciada na década de 70, vem causando prejuízos à pecuária bovina e alterações na flora nativa. Esta inundação atribuída ao assoreamento do rio Taquari pode também estar associada a mudança no regime hidrológico, passando de um período seco para um período de chuvas e cheias maiores. As cheias maiores podem estar relacionadas ao aumento do desmatamento na bacia do alto Taquari (BAT). Foram analisadas vazões no rio Taquari, contribuições do nível do rio Paraguai e da precipitação na inundação. Também foi avaliado efeito da expansão da agropecuária na BAT sobre o aumento da vazão do rio Taquari, em Coxim. Contatou-se mudança significativa no regime hidrológico da planície do baixo curso do Taquari. A partir de 1973-74...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Regime hidrológico; Mudança; Cheia; Bacia do Rio Taquari; Hydrologic regime; Change; Flood; Watershed; Taquari river basin.; Hidrologia.; Pantanal; Hydrology.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/810744

Estratificacao e composicao da vegetacao.
Provedor de dados: 14
Autores: FOTIUS, G. A.
bitstream/item/193951/1/digitalizar0030.pdf
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Paraiba; Sume; Watershed; Bacia Hidrográfica; Vegetação; Brazil; Vegetation.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132077

Bilan des connaissances sur la qualité de l'eau dans la zone du polder conchylicole de Bouin - Projet LEAUPOLD
Provedor de dados: 5
Autores: Hatt, Philippe-jacques; Stavrakakis, Christophe; Buchet, Vincent; Dupuy, Beatrice.
Le polder conchylicole de Bouin (Vendée) est le principal bassin français de production de naissains d’huîtres creuses issus d’écloseries. Depuis 2007, et malgré l’installation de dispositifs de traitement de l’eau, des anomalies dans les élevages voire des mortalités affectent la production des écloseries et nurseries du secteur, ainsi que celle de microalgues en grand volume d'une entreprise spécialisée. Les observations des professionnels orientent la recherche de la cause de ces mortalités sur les contaminants chimiques, notamment les pesticides utilisés par l'agriculture, dont les exploitations du polder agricole, qui jouxtent le polder conchylicole. Comme l'ont montré de nombreux travaux, certains de ces produits altèrent la qualité de l’eau de mer...
Tipo: Text
Palavras-chave: Bassin Loire-Bretagne; Baie de Bourgneuf; Environnement; Conchyliculture; Qualité de l'eau; Pollution chimique; Bassin versant; Mortalité; Zone côtière; Loire-Bretagne district; Bourgneuf bay; Environment; Shellfish aquaculture; Water quality; Chemical pollution; Watershed; Mortality; Coastal zone.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00280/39165/37726.pdf

Vers une modélisation déterministe des écoulements de surface en Nouvelle-Calédonie. Implémentation du code GR4H sur quatre bassins versants du Grand Nouméa
Provedor de dados: 5
Autores: Desclaux, Terence; Pischedda, Marine; Lemonnier, Hugues; Soulard, Benoit; Le Gendre, Romain.
Ce rapport fait suite au stage de Marine Pischedda (Master 2 La Rochelle) réalisé au sein de l’unité de recherche "Lagons, Ecosystèmes et Aquaculture Durable en Nouvelle-Calédonie" (LEAD/NC) de l’Ifremer entre février et juillet 2016. Cette étude a été conduite sur quatre bassins versants du Grand Nouméa : la Coulée, la Dumbéa Est, la Dumbéa Nord et la Couvelée. L’objectif principal était de démontrer la pertinence de l’utilisation de modèle pluie-débit au pas de temps horaire (GR4H en l’occurrence) sur les bassins versants calédoniens. Le cadre plus général de ce travail était d’aboutir à une représentation affinée du continuum terre-mer par le couplage des modèles GR4H et MARS3D développés pour simuler la circulation côtière. Les périodes d’étiages ayant...
Tipo: Text
Palavras-chave: Continuum Terre-Lagon; Nouvelle-Calédonie; Rivières; GR4H; Bassins versants; Grand Nouméa; Modélisation; Débits; Land-lagoon continuum; New Caledonia; River; GR4H; Watershed; Nouméa; Model; River Flow.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00388/49969/50545.pdf

Modeling of Escherichia coli Fluxes on a Catchment and the Impact on Coastal Water and Shellfish Quality
Provedor de dados: 5
Autores: Bougeard, Morgane; Le Saux, Jean-claude; Perenne, Nicolas; Baffaut, Claire; Robin, Marc; Pommepuy, Monique.
The simulation of the impact of Escherichia coli loads from watersheds is of great interest for assessing estuarine water quality, especially in areas with shellfish aquaculture or bathing activities. For this purpose, this study investigates a model association based on the Soil and Water Assessment Tool (SWAT) coupled with a hydrodynamic model (MARS 2D; IFREMER). Application was performed on the catchment and estuary of Daoulas area (France). The daily E. coli fluxes simulated by SWAT are taken as an input in the MARS 2D model to calculate E. coli concentrations in estuarine water and shellfish. Model validation is based on comparison of frequencies: a strong relationship was found between calculated and measured E. coli concentrations for river quality...
Tipo: Text
Palavras-chave: SWAT; Watershed; Estuary modeling; E coli; Shellfish; Water quality.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00033/14393/11728.pdf

The Economics of Efficient Phosphorus Abatement in a Watershed
Provedor de dados: 31
Autores: Ancev,   Tihomir; Stoecker,   Arthur L.; Storm,   Daniel E.; White,   Michael J.
This study presents a method to determine efficient environmental targets at a watershed level. Efficient targets are devised by estimating abatement cost and cost of environmental damages and minimizing their sum. The method was applied to a case study of phosphorus pollution in a watershed in Oklahoma. Several cumulative scenarios with alternative abatement options were simulated and efficient targets were determined. As the number of abatement options at disposal to agricultural sources increased, their optimal abatement expanded relative to the abatement at the point source. Efficient targets were found to be dependent on the choice of policy that stimulates abatement.
Tipo: Journal Article
Palavras-chave: Efficiency; Environmental targets; Phosphorus pollution; Watershed; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/8635

Invasive Species Control over Space and Time:  Miconia calvescens on Oahu, Hawaii
Provedor de dados: 31
Autores: Burnett,   Kimberly M.; Kaiser,   Brooks A.; Roumasset,   James A.
The optimal size and location of an invasive species population depend upon spatially differentiated biological growth, economic costs, and damages.  Although largely absent from most economic models, spatial considerations matter because the likelihood and magnitude of the invasion vary spatially and the threatened assets may be unevenly distributed across space.  We map the current and future populations of an invasive species, Miconia calvescens, on Oahu, Hawaii, and the potential damages to water quantity, quality, and endangered-species habitat, and weigh these against treatment costs.  We find that optimal densities vary from approximately 1% to 18% cover throughout the island.
Tipo: Journal Article
Palavras-chave: Geographical Information Systems; Hawaii; Invasive species; Miconia calvescens; Oahu; Spatial analysis; Watershed; Q23; Q25; Q28; Q51; Q57.
Ano: 2007
URL: http://purl.umn.edu/37274

RETHINKING REHABILITATION: SOCIO-ECOLOGY OF TANKS AND WATER HARVESTING IN RAJASTHAN, NORTH-WEST INDIA
Provedor de dados: 31
Autores: Shah,   Tushaar; Raju,   K. Vengama.
In the arid and semi-arid Indian state of Rajasthan, tanks and ponds have been a mainstay of rural communities for centuries. There are over 4600 large minor irrigation tanks, plus numerous johads, bandhs and pals (small water harvesting structures). This paper assesses a strategy proposed for rehabilitating 1200 of the larger tanks. It argues that treating tanks only as flow irrigation systems—which lies at the center of the mainstream thinking on rehabilitating surface irrigation systems--is very likely to result in a flawed strategy when applied to tanks. Instead, reviewing the successful experience of NGOs like PRADAN and Tarun Bharat Sangh in reviving and rehabilitating clusters of small traditional water harvesting structures at a watershed level, it...
Tipo: Report
Palavras-chave: Watershed; Watershed management; Multiple uses; Natural resource management; Tank rehabilitation; Collective action; Resource /Energy Economics and Policy.
Ano: 2001
URL: http://purl.umn.edu/55440

TRADE-OFFS BETWEEN ECONOMIC EFFICIENCY AND CONTAMINATION BY COFFEE PROCESSING A BIOECONOMIC MODEL AT THE WATERSHED LEVEL IN HONDURAS
Provedor de dados: 31
Autores: Barbier,   Bruno; Hearne,   Robert R.; Gonzalez,   Jose Manuel; Nelson,   Andy; Castaneda,   Orlando Mejia.
In Honduras, traditional coffee processing is the cause of two major problems: poor coffee quality and contaminated water.  In this paper we present a method that determines the trade-off between economic efficiency and contamination in a Honduran sub-watershed.  The method is a bioeconomic model based on mathematical programming that stimulates the functioning of the interlinked economic and ecological processes in the sub-watershed.  We compare various scenarii where the model is given the possibility of replacing traditional coffee processing plants with a network of improved ecological plants.  For different levels of contamination the model determines the optimal location and size of new coffee processing plants along river streams by minimizing...
Tipo: Conference Paper or Presentation
Palavras-chave: Coffee; Environment; Water quality; Mathematical programming; Transport cost; Spatial analysis; Watershed; Honduras.; Environmental Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/25930

Nonstationarity in the Specification of the Environmental Kuznets Curve
Provedor de dados: 31
Autores: Zapata,   Hector O.; Paudel,   Krishna P.
Numerous studies have addressed the question of the econometric specification of the Environmental Kuznets Curve (EKC).  This paper adds preliminary results on nonstationarity and its effect on functional form using a panel data set for the U.S. by state from 1929 to 1994.  It is found that unit-root tests strongly support a unit root in pollutants (sulfur dioxide and nitrogen oxide) and income when testing individual states.  The results from panel data unit root tests provide mixed evidence about nonstationarity in EKC data.
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Kuznets curve; Fixed and random effects; Parametric models; Water pollution; Watershed; Nonstationarity; Unit-roots; Environmental Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/19270

CLIMATE CHANGE SENSITIVITY ASSESSMENT ON UPPER MISSISSIPPI RIVER BASIN STREAMFLOWS USING SWAT
Provedor de dados: 31
Autores: Jha,   Manoj K.; Arnold,   Jeffrey G.; Gassman,   Philip W.; Gu,   Roy.
The Soil and Water Assessment Tool (SWAT) model was used to assess the impacts of potential future climate change on the hydrology of the Upper Mississippi River Basin (UMRB). Calibration and validation of SWAT were performed on a monthly basis for 1968-87 and 1988-97, respectively; R2 and Nash-Sutcliffe simulation efficiency (E) values computed for the monthly comparisons were 0.74 and 0.65 for the calibration period and 0.81 and 0.75 for the validation period. The impacts of eight 20-year (1971-90) scenarios were then analyzed, relative to a scenario baseline. A doubling of atmospheric CO2 concentrations was predicted to result in an average annual flow increase of 35 percent. An average annual flow decrease of 15 percent was estimated for a constant...
Tipo: Working or Discussion Paper
Palavras-chave: Climate change; Flow; Hydrology; Simulation; Spatial patterns; Watershed; Environmental Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/18419

Collective Action for Water Harvesting Irrigation in Lerma-Chapala Basin, Mexico
Provedor de dados: 31
Autores: Scott,   Christopher A.; Silva-Ochoa,   Paula.
Water and watersheds are difficult to separate for management purposes. Providing irrigation as a supplement to rainfall for crop production requires considerable collective action at the watershed level to mobilize labor and other resources, as well as to make decisions and implement the distribution of benefits. Small- scale water harvesting irrigation systems in Mexico have endured for centuries. They now face considerable challenges with changes in the ejido property rights over land and water, the growing importance of alternative sources of livelihoods, and increasing scarcity and competition for water within the river basins. Two case studies of water harvesting irrigation systems in the Lerma-Chapala Basin illustrate the response of communities to...
Tipo: Working or Discussion Paper
Palavras-chave: Irrigation; Watershed; Water harvesting; Water; Collective action; Property rights; Mexico; Resource /Energy Economics and Policy.
Ano: 2001
URL: http://purl.umn.edu/50057

Sny Magill Watershed Modeling Project: Final Report
Provedor de dados: 31
Autores: Saleh,   Ali; Gassman,   Philip W.; Kling,   Catherine L.
Replaced with revised version of paper 10/29/08.
Tipo: Working or Discussion Paper
Palavras-chave: BMP; Land use; Modeling; Nutrient management; Water quality; Watershed; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/18666

Agricultural Water Security and Instream Flows for Endangered Salmonids in Coastal California's Watersheds
Provedor de dados: 31
Autores: Mezzatesta,   Mariano; Newburn,   David A.; Brozovic,   Nicholas.
Many rural landowners within the Western United States do not have access to a secure water supply provided by a major dam or an irrigation district. Such water users must rely instead on groundwater pumping and/or seasonal water flows from tributaries. Some of these agricultural producers choose to store winter stream flows from tributaries within onsite reservoirs to secure their spring/summer water needs. However, regulatory agencies have increased restrictions on surface water storage and diversions to improve instream flows for endangered salmon, thus reducing water security for many landowners not located along the main stem.  The majority of salmon habitat is within the tributaries located throughout a watershed. Most research regarding instream...
Tipo: Conference Paper or Presentation
Palavras-chave: Instream flow; Salmon; Endangered species; Water; Watershed; Environmental Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/61485

Dinâmica dos usos e coberturas da terra em Área de Preservação Permanente na Bacia Hidrográfica dos Rios Mogi Guaçu e Pardo, no período entre 1988 e 2002
Provedor de dados: 31
Autores: Ambrosio,   Luis Alberto; Fasiaben,   Maria Do Carmo Ramos; Moraes,   Jener Fernando Leite De.
O objetivo deste trabalho foi estudar a dinâmica de uso e ocupação da terra em Áreas de Preservação Permanente – APPs - na Bacia Hidrográfica dos Rios Mogi Guaçu e Pardo, estado de São Paulo, de modo a subsidiar a formulação de políticas públicas. As APPs foram identificadas e mapeadas usando imagens do Landsat-7. O uso antrópico em áreas de preservação permanente tem sido freqüentemente relatado na literatura, para diferentes regiões do Brasil, com destaque para o uso agrícola. Tal fato também se observa na Bacia Mogi-Pardo, conforme se evidencia neste trabalho. A partir dos dados apresentados pode se observar, entretanto, que no período entre 1988 e 2002 houve aumento da cobertura florestal nas APPs da Bacia, provavelmente fruto do esforço de...
Tipo: Conference Paper or Presentation
Palavras-chave: Uso e cobertura da terra; Área de Preservação Permanente; Efeito-escala; Efeito-substituição; Bacia Hidrográfica; Land use cover change; LUCC; Permanent Preservation Area; Shift-share; Watershed; Land Economics/Use.
Ano: 2008
URL: http://purl.umn.edu/108920

PHOSPHORUS-BASED NUTRIENT MANAGEMENT PLANNING ON DAIRY/POULTRY FARMS: IMPLICATIONS FOR ECONOMIC AND ENVIRONMENTAL RISKS
Provedor de dados: 31
Autores: Yang,   Xiao; Bosch,   Darrell J.; Nordberg,   Tone; Wolfe,   Mary Leigh.
The effects of phosphorus (P)-based nutrient management plans on economic and environmental risks of dairy and dairy-poultry farms in Virginia were evaluated.  Phosphorus-based nutrient management plans can greatly reduce P runoff risk but also reduce farmers' returns.  P-based plans cause greater reductions in returns and P runoff on the dairy-poultry farm than on the dairy only farm.
Tipo: Conference Paper or Presentation
Palavras-chave: Nutrient runoff; Cost; Mathematical programming; Simulation; Watershed; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/21756

Evaluating Watershed Management Projects
Provedor de dados: 31
Autores: Kerr,   John M.; Chung,   Kimberly.
Watershed projects play an increasingly important role in managing soil and water resources throughout the world. Research is needed to ensure that new projects draw upon lessons from their predecessors’ experiences. However, the technical and social complexities of watershed projects make evaluation difficult. Quantitative and qualitative evaluation methods, which traditionally have been used separately, both have strengths and weaknesses. Combining them can make evaluation more effective, particularly when constraints to study design exist. This paper presents mixed-methods approaches for evaluating watershed projects. A recent evaluation in India provides illustrations.
Tipo: Working or Discussion Paper
Palavras-chave: Watershed; Natural resource management; Project evaluation; Resource /Energy Economics and Policy.
Ano: 2001
URL: http://purl.umn.edu/50051

Living on the margin: Assessing the economic impacts of Landcare in the Philippine uplands
Provedor de dados: 31
Autores: Newby,   Jonathan C.; Cramb,   Rob A.
In the Philippines, about 38 per cent of the population resides in rural areas where poverty remains a significant problem. In 2006, 47 per cent of all households in Bohol Province fell below the national poverty line, with the percentage even higher in upland communities. These households often exist in marginal landscapes that are under significant pressure from ongoing resource degradation and rising input costs. This paper first explores whether the adoption of Landcare practices in a highly degraded landscape has resulted in improved livelihood outcomes for upland farming families in Bohol. Second, it analyses the potential for the piecemeal adoption of these measures to deliver tangible benefits at the watershed scale. Finally, using a BCA approach,...
Tipo: Conference Paper or Presentation
Palavras-chave: Landcare; Philippines; Livelihoods; Poverty; Watershed; ACIAR.
Ano: 2009
URL: http://purl.umn.edu/48061

USER PARTICIPATION IN WATERSHED MANAGEMENT AND RESEARCH
Provedor de dados: 31
Autores: Johnson,   Nancy L.; Ravnborg,   Helle Munk; Westermann,   Olaf; Probst,   Kirsten.
Many watershed development projects around the world have performed poorly because they failed to take into account the needs, constraints, and practices of local people. Participatory watershed management—in which users help to define problems, set priorities, select technologies and policies, and monitor and evaluate impacts—is expected to improve performance. User participation in watershed management raises new questions for watershed research, including how to design appropriate mechanisms for organizing stakeholders and facilitating collective action. Management of a complex system such as a watershed may also require user participation in the research process itself. An increasing number of watershed research projects are already participatory,...
Tipo: Report
Palavras-chave: Watershed; Participatory watershed management; Participation; Research; Collective action; Resource /Energy Economics and Policy.
Ano: 2001
URL: http://purl.umn.edu/55439

Cost and benefits of using best management practices to control non-point sources of pollution under environmental and economic uncertainty
Provedor de dados: 31
Autores: Rodriguez,   Hector German; Popp,   Jennie S. Hughes; Gbur,   Edward E.; Chaubey,   Indrajeet.
The economy of northwest Arkansas, including the Lincoln Lake watershed (a sub-watershed of the Illinois River), relies greatly upon livestock and poultry production. The supply of production by-products is increasingly under scrutiny as one of the potential sources of water pollution in the region. In light of the recent economic crisis, methodologies that help producers to evaluate the environmental and economic impacts of several practices before implementing them may be a cost-effective means of increasing BMP adoption. This study uses stochastic dominance techniques to evaluate, environmentally and economically, ten best management practices (BMPs) combinations to lessen water pollution in the Lincoln Lake watershed. All BMP combinations analyzed were...
Tipo: Conference Paper or Presentation
Palavras-chave: Nonpoint pollution; Watershed; Best management practices; Risk analysis; Stochastic dominance; Environmental Economics and Policy; Risk and Uncertainty; Q25; Q53.
Ano: 2011
URL: http://purl.umn.edu/103344

Cost Effectiveness of Rainwater Harvesting for Groundwater Recharge in Micro-Watersheds of Kolar District of India: The Case Study of Thotli Micro-Watershed
Provedor de dados: 31
Autores: Nagaraj,   N.; Pradhani,   Umesh; Chengappa,   P.G.; Basavaraj,   G.; Kanwar,   Ramesh S.
This study has estimated the supply augmentation of groundwater recharge due to creation of water harvesting structures and has assessed the cost-effectiveness of rainwater harvesting for groundwater recharge on watershed basis in one of the sub-watersheds of the Kolar district, Peninsular India — a typically hard-rock area. The study is based on the primary data for the year 2008-09 collected from a sample of 90 farmers having irrigation bore-wells in the selected watershed named Thotli. The study has indicated that the annual draft of irrigation water exceeds the annual recharge, causing a negative balance. On an average, the returns per rupee investment have been found to be ` 1.80 on farm pond, ` 1.78 on recharge pit and ` 1.39 on field bund. The cost...
Tipo: Journal Article
Palavras-chave: Rainwater harvesting; Economic feasibility; Groundwater recharge; Watershed; Agricultural and Food Policy; Q15; Q25.
Ano: 2011
URL: http://purl.umn.edu/118229

Distribuição locacional agropecuária e concentração fundiária na Bacia Hidrográfica dos Rios Mogi Guaçu e Pardo
Provedor de dados: 31
Autores: Ambrosio,   Luis Alberto; Fasiaben,   Maria Do Carmo Ramos; Romeiro,   Ademar Ribeiro.
As relações entre a distribuição locacional dos usos da terra e a concentração fundiária, nos municípios da Bacia Hidrográfica dos Rios Mogi Guaçu e Pardo, são analisadas empregando o Quociente Locacional, a Curva de Especialização e o Índice de Gini. Os resultados mostram uma concentração fundiária excessivamente alta: metade dos municípios apresenta grau de concentração médio a forte (Índice de Gini entre 0,501 e 0,700) e metade grau forte a muito forte (Índice de Gini entre 0,701 e 0,900). Rejeitou-se, pelo teste qui-quadrado a 5% de probabilidade, a hipótese nula de independência entre as classes de concentração da posse da terra e os tipos de especialização locacional dos usos da terra, no âmbito municipal. Verificou-se que nos municípios com alto...
Tipo: Conference Paper or Presentation
Palavras-chave: Bacia hidrográfica; Concentração fundiária; Curva de Especialização; Índice de Gini; Quociente locacional; Watershed; Location quotient; Specialization curve; Gini coefficient; Land concentration; Land Economics/Use.
Ano: 2008
URL: http://purl.umn.edu/108919

Agricultural Drainage and Gulf Hypoxia: Economic Targeting of Farmland to Reduce Nitrogen Loads in a Minnesota Watershed
Provedor de dados: 31
Autores: Petrolia,   Daniel R.; Gowda,   Prasanna H.; Mulla,   David J.
Agricultural nitrogen losses are the major contributor to nitrogen loads in the Mississippi River, and consequently, to the existence of a hypoxic, or "dead", zone in the Gulf of Mexico.  Focusing on two small agricultural watersheds in southwestern Minnesota, simulation results from the Agricultural Drainage And Pesticide Management (ADAPT) model were combined with a linear-optimization model to evaluate the environmental and economic impact of alternative land-use policies for reducing nitrogen losses.  Of particular importance was the study's explicit focus on agricultural subsurface (tile) drainage, which has been identified as the major pathway for agricultural nitrogen losses in the upper Midwest, and the use of drainage-focused abatement policies....
Tipo: Conference Paper or Presentation
Palavras-chave: Drainage; Hypoxia; ADAPT; Nitrogen; Watershed; Environmental Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/19416

Assessing the Potential for Payments for Watershed Services to Reduce Poverty in Guatemala
Provedor de dados: 31
Autores: Pagiola,   Stefano; Zhang,   Wei; Colom,   Ale.
Payments for Environmental Services (PES) are being increasingly used as conservation instruments, particularly in Latin America. PES programs seek to capture part of the benefits derived from environmental services and channel them to natural resource managers who generate these services, thus increasing their incentive to conserve them. Many have assumed that these payments would go mostly to poor land users, and thus contribute to poverty reduction. There has been little empirical verification of this assumption to date, however.  The PES approach was conceptualized as a mechanism to improve the efficiency of natural resource management, and not as a mechanism for poverty reduction. Pagiola et al. (2005) identified three main questions regarding the...
Tipo: Conference Paper or Presentation
Palavras-chave: Payments for Environmental Services (PES); Watershed; Poverty; Guatemala; Environmental Economics and Policy; International Development.
Ano: 2008
URL: http://purl.umn.edu/42932

Phosphorus Forms in Sediments as Indicators of Anthropic Pressures in an Agricultural Catchment in Southern Brazil
Provedor de dados: 90
Autores: Tiecher,Tales; Schenato,Ricardo Bergamo; Santanna,Maria Alice; Caner,Laurent; Santos,Danilo Rheinheimer dos.
ABSTRACT Phosphorus (P) fractionation is a suitable procedure to ascertain P lability in sediments and is able to distinguish sources of P under different soil management practices in a catchment. Brazil is the second largest producer and the largest exporter of tobacco in the world. Inadequate management of cultivated areas exposes the soil to erosion processes, accelerating the transfer of sediment and P to water bodies, which leads to eutrophication. We evaluated the P forms in suspended sediments collected at two rainfall events in the stream of a small catchment in the state of Rio Grande do Sul. The samples were collected upstream and downstream areas in three sub-catchments with different degrees of anthropogenic pressure and in three phases of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus fractionation; Watershed; Nonpoint source pollution; Eutrophication; Land use.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100431

Tipping Bucket Prototype for Automatic Quantification of Surface Runoff Rate in Plots
Provedor de dados: 90
Autores: Somavilla,André; Gubiani,Paulo Ivonir; Zwirtz,Anderson Luiz.
ABSTRACT: Quantification of runoff rate is an onerous task with non-automated devices; it requires a lot of manual labor to perform measurements. In this study, an automatic device to quantify the surface runoff rate from plots with a small area was developed and tested. The prototype was based on the tipping bucket technique and built with reused materials. Its performance was tested in the laboratory and a calibration curve was developed to improve measurement accuracy. The device can be used for automatic quantification of surface runoff in small plots, with a flow rate of less than 750 × 103 mm3 min-1. The device can be built with different dimensions to measure different flow rates. In that case, the error measurements and calibration curve must be...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Tipping bucket; Gauge; Flow rate; Watershed.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100504

Comparison of methodologies for automatic generation of limits and drainage networks for hidrographic basins
Provedor de dados: 91
Autores: Alcaraz,Samantha A.; Sannier,Christophe; Vitorino,Antonio C. T.; Daniel,Omar.
The objective of this work was to compare methodologies for the automatic generation of limits and drainage networks, using a geographical information system for basins of low relief variation, such as the Dourados catchment area. Various data/processes were assessed, especially the ArcHydro and AVSWAT interfaces used to process 50 m resolution DTMs formed from the interpolation of digitalized contour lines using ArcInfo, ArcView and Spring GIS, and a 90 m resolution SRTM DTM acquired by interferometry radar. Their accuracy was estimated based upon the pre-processing of small basic sub-basin units of different relief variations, before applying the best combinations to the entire Dourados basin. The accuracy of the automatic stream network generation and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Watershed; Catchment; Geographic information systems.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662009000400001

Water quality index using multivariate factorial analysis
Provedor de dados: 91
Autores: Coletti,Christiane; Testezlaf,Roberto; Ribeiro,Túlio A. P.; Souza,Renata T. G. de; Pereira,Daniela de A.
The evaluation of environmental effects generated by agricultural production on water quality became essential in Brazil after the creation of policies for the use and conservation of water resources. For such, water quality indices have been considered with the purpose of showing the spatial and temporal variation of water quality in a watershed. The objective of this study was to develop a water quality index (WQI) applying the Multivariate Factorial Analysis (MFA) statistical technique, which could indicate the influence of agricultural activities in the quality of water resources. Water in a predominantly farm watershed was monitored from Sept. 2003 to Sept. 2004. Monthly water collections were carried out at six sample points, and eight parameters...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural contamination; Water resources; Watershed.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662010000500009

Dynamic systems approach assess and manage water resources in river basins
Provedor de dados: 63
Autores: Sánchez-Román,Rodrigo Máximo; Folegatti,Marcos Vinicius; Orellana González,Alba María Guadalupe; Silva,Rogério Teixeira da.
The Piracicaba, Capivari and Jundiaí River Basins (RB-PCJ) are located in the States of Minas Gerais and São Paulo, Brazil. By 2005, 5.8% of Brazil's General National Product-GNP was produced there. Such economic development has created a huge demand for water resources. The availability of water resources was assessed by running a dynamic systems simulation model to manage these resources in the RB-PCJ (WRM-PCJ), considering five 50-year simulations. WRM-PCJ was developed as a tool to aid the RB-PCJ Watershed Committee. The model computes water supply, demands, and contamination load from several consumers. When considering a Business-as-Usual scenario, by 2054, water demands will have increased up to 76%, 39% of the available water will come from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water stress; Water management; Watershed; Modeling.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000400001

Can land use changes alter carbon, nitrogen and major ion transport in subtropical brazilian streams?
Provedor de dados: 63
Autores: Silva,Daniela Mariano Lopes da; Ometto,Jean Pierre Henry Balbaud; Lobo,Gré de Araújo; Lima,Walter de Paula; Scaranello,Marcos Augusto; Mazzi,Edmar; Rocha,Humberto Ribeiro da.
Several studies in tropical watersheds have evaluated the impact of urbanization and agricultural practices on water quality. In Brazil, savannas (known regionally as Cerrados) represent 23% of the country's surface, representing an important share to the national primary growth product, especially due to intense agriculture. The purpose of this study is to present a comprehensive evaluation, on a yearly basis, of carbon, nitrogen and major ion fluxes in streams crossing areas under different land use (natural vegetation, sugar cane and eucalyptus) in a savanna region of SE Brazil. Eucalyptus and sugar cane alter the transport of the investigated elements in small watersheds. The highest concentration of all parameters (abiotic parameters, ions, dissolved...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Savanna; Nutrients; Watershed; Sugar cane; Eucalyptus.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000400002

Sustainable land use management planning in the Phu Fa project, Nan watershed, Northern Thailand
Provedor de dados: 106
Autores: Tanasombat, M.; Vongsrivattana, P.; Insuan, W.; Sakurai, K.
Palavras-chave: Plannin; Watershed; Management.
Ano: 2004
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4980

Sustainable land use management planning in the Phu Fa project, Nan watershed, Northern Thailand
Provedor de dados: 106
Autores: Tanasombat, M.; Vongsrivattana, P.; Insuan, W.; Sakurai, K.
Palavras-chave: Plannin; Watershed; Management.
Ano: 2005
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4978

Consequences of suppressing natural vegetation in drainage areas for freshwater ecosystem conservation: considerations on the new "Brazilian forest code"
Provedor de dados: 39
Autores: Pinheiro,Marcelo Henrique Ongaro; Carvalho,Lucélia Nobre; Arruda,Rafael; Guilherme,Frederico Augusto Guimarães.
The input of particulate and dissolved organic matter (POM and DOM, respectively) from terrestrial ecosystem drainage basins is an important energy and nutrient source in limnic food chains. Studies indicated that semi-deciduous seasonal forests located in drainage areas in Brazil have the potential to produce 7.5 - 10.3 Mg ha−1/year of POM. The global increase in vegetation destruction, such as forests, threatens this allochthonous resource and can have significant impacts on river and lake communities and food chains. Therefore, it is critical that exploitation and occupation protocols are updated to protect the transition areas between terrestrial and limnic ecosystems. This review highlights the existing knowledge of these ecosystem interactions and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Freshwater biodiversity; Freshwater food chains; Freshwater resources; Riparian forests; Watershed.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200262

Composition and structure of the gallery forest in the Taquaruçu GrandeSub-basin, Municipality of Palmas, Tocantins State
Provedor de dados: 3
Autores: Silva, Wagner Matos da; Lolis, Solange de Fátima; Viana, Rodney Haulien Oliveira.
In the State of Tocantins, there is an abundance of water bodies, and consequently a large range of gallery forests. Despite growing awareness of the importance of these forest resources and the need to conserve them, little is known about the composition and floristic diversity of existing remnants, which still represent part of the original vegetation. The aim of this study was to review and compare the floristic composition and structure of the tree layer of the gallery forest in two microbasins of Taquaruçu Grande Sub-basin, Palmas County, Tocantins State. For phytosociological sampling, contiguous 50 plots of 10 x 10 m were set in each area, where all the individuals with trunk circumference greater than or equal to 15, at 130 cm from the ground were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tree layer; Watershed; Similarity Botânica.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28663

Peak discharge estimation to evaluate and monitor the Gumbasa Watershed performance, Central Sulawesi, Indonesia
Provedor de dados: 111
Autores: Naharuddin, Naharuddin Naharuddin; Sadeghi, Seyed Mohammad Moein; Malik, Adam; Rosyid, Abdul; Ahyauddin, Ahyauddin.
One of the appropriate strategies to evaluate watershed health is by determining peak discharge. This is associated with the influence of frequent floods and landslides on the changes in the carrying capacity of Gumbasa watershed. It was also attached to the accelerated forest and land degradation due to encroachment, especially in the upstream. This study aims to determine the estimated peak discharge of three sub-watersheds, including Lindu, Palolo, and Gumbasa to monitor and evaluate the performance of the main watershed. This was conducted using a rational method with a combined and average flow coefficient approach, while the rainfall intensity was calculated based on the longest concentration time. The results showed the flow coefficient in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydrology; Watershed; Runoff coefficient; Peak discharge.
Ano: 2021
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6723

Estimation of infiltration rate of a paddy growing area in a micro watershed of Sikkim, India
Provedor de dados: 111
Autores: Patle, G T.
This study aimed to estimate the constant infiltration rates from paddy growing area of a micro watershed located in the hilly state of Sikkim, India. Double ring infiltometer test was used for the field measurement of infiltration rates. The observed infiltration rates were compared with predicted values obtained by Horton, Philip, Kostiokov and Green-Ampt infiltration models. The suitability analysis of models was checked through statistical tools namely coefficient of determination and standard error and the best model was identified for the paddy fields of hill topography. The soil samples were collected for the estimation of soil moisture content, bulk density and soil texture analysis. Soil texture was sandy loam to loamy sand within the micro...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Infiltration; Infiltration models; Paddy fields; Sikkim; Soil texture; Watershed.
Ano: 2021
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6659

Simulated effect of wetting/drying periods for two textural soils amended with biochar at a catchment scale
Provedor de dados: 111
Autores: Villagra-Mendoza, Karolina; Carvajal-Vanegas, Dorian; Beck-Broichsitter, Steffen; Horn, Rainer.
Biochar is considered as an option to ameliorate soil functions, by improving soil physical and hydraulic soil properties. This study investigated the effect of biochar and of wetting and drying cycles on the water infiltration at laboratory and at a hypothetical watershed scenario. In the laboratory, test samples with 2.5 and 5% (by dry mass) of a mango-wood biochar were added to a sandy and sandy loam soil material. Cumulative infiltration was determined after simulated intense wetting and drying cycles, by drying the samples at 30°C for three consecutive days. Additionally, biochar amended soil hydraulic parameters, obtained at the laboratory, were used to simulate the water discharge of a hypothetical watershed, with the Soil and Water Assessment Tool...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Infiltration; Watershed; Biochar; Surface runoff; Wetting; Drying.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5562

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

Relations between hidrogeomorphic attributes of the Dourados basin-Brazil and their enviromental signficance
Provedor de dados: 115
Autores: Samantha Alcaraz,Omar Daniel; Tadeu-Vitorino,A. Carlos; Sannier,Christophe.
The study of the morphometry within of catchment boundaries allowed to quantify aspect of the fluvial system in relation to geology, geomorphology and hydrology of the basin of Dourados river, Brazil, making possible to analyse the relations between hydrographic and environmental properties like the first step to better understand the processes taking place within the catchment area. The drainage network was described using qualitative and dimensional observations, from which significant quantitative attributes were derived, including interpolated drainage density and drainage frequency. Environmental data such as geology, geomorphology and soils type were acquired to allow an interpretation of their relationships with the drainage network. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydrogeomorphology; Watershed; Catchment.
Ano: 2011
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952011000300001

Antifungal susceptibility of yeasts isolated from anthropogenic watershed
Provedor de dados: 42
Autores: MILANEZI,ANA C.M.; WITUSK,JOÃO P.D.; VAN DER SAND,SUELI T.
Abstract Yeasts are unicellular fungi widespread in the environment, and studies suggest that there is a positive correlation between yeast and polluted aquatic environments. The aim of this study was to analyze the diversity and resistance of yeasts isolated from water samples collected along the Arroio Dilúvio in Porto Alegre to antifungals. Yeast isolates from the Arroio Dilúvio were subjected to susceptibility assays against antifungals using the minimum inhibitory concentration (MIC) test, and amplification of the ITS1-5.8S-IT2 region; in addition, the ITS-5.8S region was sequenced for some of the isolates. The amplification product was subjected to PCR-RFLP, and the restriction profile allowed the construction of a dendrogram. Susceptibility tests...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yeast; Antifungal; Watershed; Resistance.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100601

Three decades of reference evapotranspiration estimates for a tropical watershed in the eastern Amazon
Provedor de dados: 42
Autores: SILVA JÚNIOR,RENATO O. DA; SOUZA,EVERALDO B. DE; TAVARES,ALEXANDRA L.; MOTA,JOSÉ A.; FERREIRA,DOUGLAS B.S.; SOUZA-FILHO,PEDRO W.M.; ROCHA,EDSON J.P. DA.
ABSTRACT This study estimated the reference evapotranspiration rate (ETo) for the Itacaiúnas River Watershed (IRW), Eastern Amazonia, and measured the accuracy of eight empirical equations: Penman-Monteith (PM), Priestley-Taylor (PT), Hargreaves and Samani (HS), Camargo (CAM), Thornthwaite (TH), Hamon (HM), Kharrufa (KF) and Turc (TC) using monthly data from 1980 to 2013. In addition, it verifies the regional applicability to the IRW using a for the Marabá-PA station. The methods TC and PM (FAO56) presented the best results, which demonstrate that radiation and higher temperatures are the dominant drivers in the Evapotranspiration process, while relative humidity and wind speed have a much smaller impact. The temporal and spatial variability of ETo for IRW...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calibration; Decades; Eastern Amazon; Evapotranspiration; Methods; Watershed.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000501985

Past and present land use influences on tropical riparian zones: an isotopic assessment with implications for riparian forest width determination
Provedor de dados: 49
Autores: Salemi,Luiz Felippe; Lins,Silvia Rafaela Machado; Ravagnani,Elizabethe de Campos; Magioli,Marcelo; Martinez,Melissa Gaste; Guerra,Fernando; Vidas,Natassia Bonini; Fransozi,Aline; Ferraz,Silvio Frosini de Barros; Martinelli,Luiz Antonio.
Abstract In this article, by using carbon stable isotopes, we assessed the past and present land use influences that riparian areas are subject within agricultural landscapes. Emphasis is given to the understanding of the effects of the 2012 Brazilian Forest Act on such areas. We selected five riparian areas within a highly C4 dominated agricultural landscape. Three of them had 30 meters native riparian forest buffer (NRFB) and two of them had 8 meter and no NRFB. We used three 100 meter-transects located 5, 15 and 30 meters relative to stream channel to obtain soil samples (0 - 10 cm). All riparian areas presented soil carbon isotopic signatures that are not C3 (native forests) irrespective of having or not 30 meters NRFB. Two cases presenting less than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Watershed; Soil degradation; Organic matter; Sediment; Carbon cycling.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000200210

Hydrosedimentological dynamic on Água Fria Watershed
Provedor de dados: 52
Autores: Silva,Alexandre Marco da; Schulz,Harry Edmar.
This study aimed surveying the amount of sediment yielded from the Água Fria watershed (Palmas, Tocantins, Brazil), from February-1998 to January-1999, and investigating the relations between the sediment yield and some environmental and/or antropic factors. The Colby's method was the technique employed for this investigation. The specific sediment yield and sediment delivery ratio were also determined for this period. It was estimated that 138,619 tons of sediment were yielded and the specific sediment yield for the study area was 827 t km-2 y-1, while the sediment delivery ratio was 6.2%. The suspended load was the most dominating fraction in almost all the studied period.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sediment yield; Sediment delivery ratio; Watershed.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000500014

Hydrologic pulses and remaining natural vegetation in Jaú and Jacaré-Pepira watersheds
Provedor de dados: 52
Autores: Rezende,Jozrael Henriques; Pires,José Salatiel Rodrigues; Mendiondo,Eduardo Mario.
The aim of this work was to study the influence of natural vegetation in two subwatersheds of the Tietê-Jacaré Water Resources Management Unit in São Paulo State on the pulse of their rivers. In Jacaré-Pepira Subwatershed, having higher remaining cover index, pulses were more predictable and had lower amplitude in the study period, indicating less perturbation of the water body and higher resilience of the aquatic ecosystem. Jacaré-Pepira River specific mean discharge was higher than the Q5% calculated through the Hydrologic Regionalization Method for São Paulo State, whereas Jaú River mean discharge was lower than Q5%. The minimum discharge recorded for Jacaré-Pepira River was higher than Q7.10 and equal to Q95%, whereas for Jaú River this value was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Discharge; Watershed; Remaining vegetation cover.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000500017

Water quality in watershed of the Jaboatão River (Pernambuco, Brazil): a case study
Provedor de dados: 52
Autores: Souza,Antonio Donizetti Gonçalves de; Tundisi,José Galizia.
The purpose of the present work was to evaluate anthropogenic influences on the water quality and to offer a subsidy to the establishment of water quality goals in the Jaboatão River Basin (Pernambuco State, Brazil). Eight sampling points were established and were sampled monthly during one hydrological cycle (March/98-February/99). The following variables were analyzed: temperature, pH, conductivity, chlorine, alkalinity, dissolved oxygen, biochemical oxygen demand, fecal coliforms, nitrate, total phosphorus and total solids. The most critical variables related to water quality objectives were dissolved oxygen, fecal coliforms and total phosphorus. Maps of land use, legally protected areas, area industries, and water withdrawals were utilized in order to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Watershed; Water quality; Environmental management.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400026

Water quality of the Canchim’s creek watershed in São Carlos, SP, Brazil, occupied by beef and dairy cattle activities
Provedor de dados: 52
Autores: Primavesi,Odo; Freitas,Alfredo Ribeiro de; Primavesi,Ana Cândida; Oliveira,Haydée Torres de.
The Canchim’s creek watershed in São Carlos, SP, Brazil, was chosen to evaluate water quality affected by dairy and beef cattle production systems based on tropical pasture. The water samples were collected monthly, during three years, at six sampling points: spring in a tropical forest, spring in an intensive dairy production system, two dam springs, and stream water upward and at the delta. Results showed differences (P&lt;0.01) among sampling points for the mean parameters. True color, hardness, turbidity, electric conductivity, alkalinity, pH, chemical oxygen demand and consumed oxygen explained well differences among sampling points. According to current legislation standards, water quality fitted with most of the established parameters for class 2,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dairy cattle; Beef cattle; Intensive management; Pasture; Water quality; Watershed.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000200013

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

Water quality of the reservoirs used for irrigation in São José dos Pinhais, Paraná State, Brazil
Provedor de dados: 65
Autores: Jarek,Tiago Miguel; Souza,Jorge Luiz Moretti de; Favaretto,Nerilde; Ruaro,Lucimeris.
ABSTRACT: Land use outside its agricultural potential and low vegetation cover in the watershed impair the quality of water used for irrigation and may contribute to the spread of pathogenic coliform bacteria. The objective of this study was to relate the quality of irrigation water with the intensity and type of land use and the rainfall in a vegetable-producing region of São José dos Pinhais, Paraná. Water samples were collected monthly in 2013 from two reservoirs and one preserved source. After collection, the samples were chilled in Styrofoam boxes and transported to the laboratory for analyses of the total and thermotolerant coliforms. Effect of land use was analyzed by probability estimation trees. High land use and weekly above average rainfall...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coliform; Watershed; Land use.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000400626

Land suitability for final waste disposal with emphasis on septic systems installation in southern Minas Gerais, Brazil
Provedor de dados: 64
Autores: Oliveira,Jeani Moreira de; Silva,Sérgio Henrique Godinho; Menezes,Michele Duarte de; Kämpf,Nestor; Curi,Nilton.
ABSTRACT Environmental pollution is a problem that has been noted due to changes in the environment, affecting natural resources. Regarding the soil, it may offer great potential for waste disposal. Thus, this study aims to propose criteria for evaluating local suitability for waste disposal, according to soil and terrain attributes for southern Minas Gerais State, and to apply those criteria to define the most appropriate locations for installation of septic systems in a pilot watershed. Literature and the authors' experience were used to propose the more important criteria regarding the suitability of sites for waste disposal. The set of attributes taken into account was grouped into four suitability classes: Adequate, Regular, Restricted and Inadequate....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental pollution; Watershed; Pedology.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000100037