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| Registros recuperados: 136 | |
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| García Aguirre, María Concepción. |
| Los bosques ubicados al sur y oeste de la Ciudad de México son muy importantes para la recarga de mantos acuíferos que suministran agua a los habitantes de esta ciudad, pero se encuentran afectados por tala, incendios forestales, plagas, enfermedades y urbanización. En el presente estudio relacioné los patrones de cobertura vegetal de la región con otros elementos del paisaje (geología, geomorfología, suelos, clima) y estimé el efecto de la pérdida de cobertura vegetal a través de tiempo, sobre el patrón de escurrimiento superficial de agua en la zona, a través de modelado conceptual y cartográfico. Estimé el nivel de cambio en superficie de los bosques en el periodo 1973-2002, utilizando imágenes de satélite Landsat (MSS y ETM), con apoyo de... |
| Tipo: Tesis |
Palavras-chave: Deforestación; Hidrología; SIG; Detección Digital de Cambio; Doctorado; Botánica; Deforestation; Hydrology; Change Detection. Mexico City. |
| Ano: 2008 |
URL: http://hdl.handle.net/10521/1479 |
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| Jones, Chas E; International Arctic Research Center, University of Alaska Fairbanks; chas@chasjones.com; Kielland, Knut; Institute of Arctic Biology, University of Alaska Fairbanks; kkielland@alaska.edu; Hinzman, Larry D; International Arctic Research Center, University of Alaska Fairbanks; ldhinzman@alaska.edu; Schneider, William S; Oral History Department, University of Alaska Fairbanks; wsschneider@alaska.edu. |
| The integration of local knowledge and science represents an opportunity to enhance the understanding of interrelations among climate, hydrology, and socioeconomic systems while providing mutual benefits to scientists and rural communities. Insight from rural Alaskans helped to identify a social-ecological threshold used to model potential driftwood harvest from the Yukon River. Information from residents of Tanana, Alaska, was combined with scientific data to model driftwood harvest rates. Modeling results estimated that between 1980 and 2010, hydrologic factors alone were responsible for a 29% decrease in the annual wood harvest, which approximately balanced a 23% reduction in wood demand because of a decline in number of households. The... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Biomass; Climate; Driftwood; Economics; Flood; Hydrology; Large woody debris; Local knowledge; Participatory research; Social-ecological model; Threshold. |
| Ano: 2015 |
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| Xavier,Alexandre C.; Cecílio,Roberto A.; Pruski,Fernando F.; Lima,Julião S. de S.. |
| The aim of this study was to generate maps of intense rainfall equation parameters using interpolated maximum intense rainfall data. The study area comprised Espírito Santo State, Brazil. A total of 59 intense rainfall equations were used to interpolate maximum intense rainfall, with a 1 x 1 km spatial resolution. Maximum intense rainfall was interpolated considering recurrence of 2; 5; 10; 20; 50 and 100 years, and duration of 10; 20; 30; 40; 50; 60; 120; 240; 360; 420; 660; 720; 900; 1,140; 1,380 and 1,440 minutes, resulting in 96 maps of maximum intense rainfall. The used interpolators were inverse distance weighting and ordinary kriging, for which significance level (p-value) and coefficient of determination (R²) were evaluated for the cross-validation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Intensity-duration-frequency equation; Geostatistics; Hydrology. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000300012 |
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| Damé,Rita de C. F.; Teixeira-Gandra,Claudia F. A.; Villela,Francisco A.; Santos,Jacira P. dos; Winkler,Antoniony S.. |
| The intensity, duration, and frequency relationship (IDF) of rainfall occurrence may be done through continuous records of pluviographs or daily pluviometer values . The objective of this study was to estimate the intensity-duration-frequency relationships of precipitation, using the method of daily rainfall disaggregation, at weather stations located to the southern half of the state of Rio Grande do Sul; comparing them with those obtained by rain gauge records, in places considered homogeneous from the meteorological point of view. The IDF equation parameters were estimated from daily rainfall disaggregation data, using the method of nonlinear optimization. To validate the equations confidence indices and efficiency and the "t" Student test, among... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrology; Daily rainfall disaggregation; Heavy rain. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000400006 |
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| Peters,Jan; Wieme,Vanessa; Boeckx,Pascal; Samson,Roeland; Godoy,Roberto; Oyarzún,Carlos; Verhoest,Niko. |
| Ecohydrology investigates how hydrological processes affect plant growth and vice versa. As these mutual interactions are important in many ecosystems, ecohydrology has wide applicability. An important aspect of ecohydrological research is the assessment and prediction of the occurrence of plant species or vegetation types in relation to hydrological or hydrogeochemical habitat conditions. Several models have been developed (e.g. DEMNAT, ICHORS, ITORS, ITORS-VL). All of these models are data driven. Consequently a monitoring network has to be installed, possibly in addition to existing databases. These networks are ecosystem specific but the most widely monitored variables are: water table depth, electric conductivity of groundwater, soil moisture content... |
| Tipo: Journal article |
Palavras-chave: Ecohydrology; Modelling; Vegetation; Hydrology; Decision support systems. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200007 |
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| FIGUEIREDO, E. O.; MOURA, D. C. de S.; FIGUEIREDO, S. M. de M.; PAPA, D. de A.. |
| Novas tecnologias, sendo advindas do geoprocessamento e do sensoriamento remoto, vêm sendo desenvolvidas a fim de auxiliar no processo de delimitação das APPs e demarcação das árvores. No entanto, faltam estudos para investigar e comprovar sua eficácia. Não há registro de trabalhos, publicados no Brasil, que utilizem diferentes metodologias na definição de APPs para avaliá-las. O presente trabalho teve como objetivo propor uma metodologia precisa para o mapeamento de áreas de preservação permanente e definição de árvores protegidas e exploráveis na região de influência das APPs, comprovando a sua aplicabilidade nos PMFS. |
| Tipo: Circular Técnica (INFOTECA-E) |
Palavras-chave: Código Florestal; Área de proteção ambiental; Área de Preservação Permanete (APP); Geotécnica; Manejo florestal; Biometria florestal; Embrapa Acre; Manejo de precisão; Sistema de posicionamento global; Forest biometry; Modelagem 3D; Modeflora; Acre; Rio Branco (AC); Biometría forestal; Amazônia Ocidental; Western Amazon; Agricultura de precisión; Mapeamento; Cubierta (plantas); Inventario forestal; Ley ambiental; Manejo forestal; Sistemas de información geográfica; Sistemas de posicionamiento global; Teledetección.; Sensoriamento remoto; Sistema de informação geográfica; Agricultura de precisão; Inventário florestal; Administração florestal; Vegetação; Hidrografia; Cartografia; Hidrologia.; Precision agriculture; Forest management; Global positioning systems; Geographic information systems; Forest inventory; Hydrology; Canopy; Environmental law.; Cartography; Remote sensing. |
| Ano: 2009 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/852921 |
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| SOUZA, O. C. de; ARAÚJO, M. R.; USSAMI, N.; FISSEHA, S.; KONZEN, L.. |
| Nas últimas décadas, grandes áreas de Cerrados de Mato Grosso do Sul foram convertidas em sistemas produtivos agrícolas e pastoris, sem a devida observância do potencial de utilização das terras. Com o tempo, algumas regiões, como a Bacia do Rio Taquari, passaram a apresentar problemas ambientais de grandes proporções em resposta a processos erosivos, cuja evolução progressiva sugere ineficiência dos sistemas de manejo visando à conservação ambiental. Os processos erosivos, estabelecidos na região de planaltos da alta Bacia do Rio Taquari, manifestam-se em escalas temporal e espacial ainda não inteiramente compreendidas e consideradas. Há falta de estudos sobre a erosão fluvial, principalmente em cabeceiras de drenagem, que acumulam grandes quantidades de... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Bacia do Rio Taquari; Mato Grosso do Sul; Brasil; Erosion; Brazilian savannas.; Cerrado; Erosão; Geomorfologia; Hidrologia; Geologia; Sensoriamento Remoto.; Pantanal; Geology; Brazil; Geomorphology; Hydrology; Remote sensing.. |
| Ano: 2004 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/318826 |
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| LIMA, J. E. F. W.; LOPES, W. T. A.; SILVA, E. M. da; VIEIRA, M. R.. |
| RESUMO: O conhecimento do comportamento hidrossedimentológico de uma bacia hidrográfica é fundamental para a adequada gestão e uso de seus recursos hídricos. Este traballho objetivou realizar, a partir dos dados hidrossedimentométricos da Bacia do Rio Piquiri, um diagnóstico sobre o seu comportamento hidrossedimentológico. Utilizando os dados fluviométricos e hidrossedimentométricos do banco de dados Hidro, sob gestão da Agência Nacional das Águas - ANA, foi estimado o potencial para produção ou deposição de sedimentos de cada trecho da bacia, aplicando o procedimento de balanço de massa. Foram identificados três trechos onde ocorre deposição de sedimentos na bacia: entre as estações Porto Carriel e Porto Guarani, no Rio Piquiri; entre as estações Porto... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Manejo da água; Sediment.; Bacia Hidrográfica; Erosão Hídrica; Hidrologia; Sedimento.; Qualidade da Água; Recurso Hídrico; Hydrology; Water quality; Water resources; Watersheds.; Water management; Water erosion. |
| Ano: 2004 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569087 |
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| Verron, Jacques; Bonnefond, Pascal; Aouf, Lofti; Birol, Florence; Bhowmick, Suchandra A.; Calmant, Stephane; Conchy, Taina; Cretaux, Jean-francois; Dibarboure, Gerald; Dubey, A. K.; Faugere, Yannice; Guerreiro, Kevin; Gupta, P. K.; Hamon, Mathieu; Jebri, Fatma; Kumar, Raj; Morrow, Rosemary; Pascual, Ananda; Pujol, Marie-isabelle; Remy, Elisabeth; Remy, Frederique; Smith, Walter H. F.; Tournadre, Jean; Vergara, Oscar. |
| The India-France SARAL/AltiKa mission is the first Ka-band altimetric mission dedicated primarily to oceanography. The mission objectives were firstly the observation of the oceanic mesoscales but also global and regional sea level monitoring, including the coastal zone, data assimilation, and operational oceanography. SARAL/AltiKa proved also to be a great opportunity for inland waters applications, for observing ice sheet or icebergs, as well as for geodetic investigations. The mission ended its nominal phase after three years in orbit and began a new phase (drifting orbit) in July 2016. The objective of this paper is to highlight some of the most remarkable achievements of the SARAL/AltiKa mission in terms of scientific applications. Compared to the... |
| Tipo: Text |
Palavras-chave: Altimetry; Ka-band; Oceanography; Hydrology; Ice; Geodesy. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00600/71248/69623.pdf |
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| Lassus, Patrick; Maggi, Pierre; Proniewski, F.; Truquet, Philippe; Bardouil, Michele. |
| Since 1987 Antifer oil tanker terminal (Normandy, France) was weIl known, as a preferential area for summer highest blooms of Dinophysis cf acuminata, a toxic dinoflagellate. Three oceanographic cruises were made in August 1989, before, in the course of and after the seasonal max. of this species. Results obtained from these cruises (hydrological parameters and phytoplankton) as weIl as from a daily survey at a reference station in Antifer harbour, corrobora te the prevailing role of coastal up flowing of Seine estuarine waters, pushed to the coast by a dominant S - SW wind, on intensity and duration of Dinophysis bloom. Such observations are in agreement with those of Summer 1987 at reference station. |
| Tipo: Text |
Palavras-chave: Antifer; Dinophysis; Hydrologie; Phytoplancton; Antifer; Dinophysis; Hydrology; Phytoplankton. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/00138/24946/23039.pdf |
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| Planque, Benjamin; Lazure, Pascal; Jegou, Anne-marie. |
| A complex set of hydrodynamical structures co-exist over the Bay of Biscay continental shelf. These structures, which can spread over a limited spatial range (10s of km) and last for periods ranging from days to months, influence the rates and nature of biological production. They need to be accurately described before the mechanisms linking hydrodynamics to production can be unraveled. Such description generally requires not only 3D observations of hydrological fields (temperature, salinity, density), but also a description of how these fields vary with time. This is hardly achievable with current means of field observation but can be mimicked by hydrodynamic model simulations. Using simulations from a 3D hydrodynamic model, we developed a methodology... |
| Tipo: Text |
Palavras-chave: Bay of Biscay; Hydrology; Hydrodynamic model; Spring; Typology. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/00000/10933/7575.pdf |
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| Antajan, Elvire; Lefebvre, Alain; Loots, Christophe; Rocroy, Mélanie; Ruellet, Thierry. |
| This is the 38th annual surveillance report concerning the nuclear power plant of Gravelines. Its very high power level results from six plant units located on the shore and is characterised by a cooling system with a coastal surface input and output. The production of electricity began in 1980 and reached maximum in 1986. Surveys concern monitoring of pelagic system (hydrology, microbiology, phytoplankton, and zooplankton), fish populations (larvae and eggs of Sole and Sprat) or crustaceans (shrimps), and benthic macrofauna (intertidal and subtidal). This survey deals with spatial and temporal approaches (i) study of the direct impact by comparison of the input and output seawater stations, (ii) study of medium and long term evolution of the area by... |
| Tipo: Text |
Palavras-chave: Centrale nucléaire; Gravelines; Surveillance; Hydrologie; Halieutique; Plancton; Benthos; Microbiologie; Nuclear power plant; Gravelines; Network survey; Hydrology; Fisheries; Plankton; Microbiology; Benthos. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00332/44313/43879.pdf |
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| Quintin, Jean-yves; Sottolichio, Aldo; Derriennic, Herve; Doremus, Sandrine; Agion, Tony; Peset, Sébastien; Hervio Heath, Dominique; Sautour, Benoit; Parra, René; Nowaczyck, Antoine; Bachelet, Guy; Leconte, Michel. |
| Monitoring n° 38 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2015. Physicochemistry, Bathymetry, Contaminants, Bacteriology, Zooplankton, Benthic macrofauna, are reported. |
| Tipo: Text |
Palavras-chave: Centrale nucléaire; Pelagos; Physico chimie; Hydrologie; Microbiologie; Estuaire de la Gironde; Surveillance; Bathymétrie; Zooplancton; Macrofaune benthique.; Nuclear power plant; Pelagos; Physico chemistry; Hydrology; Zooplankton; Gironde estuary; Monitoring; Bathymetry; Benthic macrofauna.; Microbiology. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00327/43800/43361.pdf |
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| Registros recuperados: 136 | |
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