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| Registros recuperados: 139 | |
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| Almeida,Flavio Guilherme Vaz de; Calmant,Stephane; Seyler,Frédérique; Ramillien,Guillaume; Blitzkow,Denizar; Matos,Ana Cristina Cancoro; Silva,Joecila Santos. |
| Gravity Recovery and Climate Experiment (GRACE) mission is dedicated to measuring temporal variations of the Earth's gravity field. In this study, the Stokes coefficients made available by Groupe de Recherche en Géodésie Spatiale (GRGS) at a 10-day interval were converted into equivalent water height (EWH) for a ~4-year period in the Amazon basin (from July-2002 to May-2006). The seasonal amplitudes of EWH signal are the largest on the surface of Earth and reach ~ 1250mm at that basin's center. Error budget represents ~130 mm of EWH, including formal errors on Stokes coefficient, leakage errors (12 ~ 21 mm) and spectrum truncation (10 ~ 15 mm). Comparison between in situ river level time series measured at 233 ground-based hydrometric stations (HS) in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spatial geodesy; Hydrology; GRACE satellite; Amazon Basin. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672012000100015 |
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| Mendes,Cândida; Dias,Eduardo. |
| The Azores archipelago in the North Atlantic is an important area for biodiversity because it is rich in rare species and habitats, and almost undisturbed. Sanguinhal mire was originally a lake that evolved through paludification into a peat habitat. It is located inside Nature 2000 (European Union for Protection of Nature and Biodiversity, Council Directive 92/43/EEC of 21 May 1992 on the conservation of natural habitats and of wild fauna and flora, Habitat Directive Annex I(b) habitat 7140) area of Santa Bárbara and Pico Alto Mountains on the island of Terceira, and it is a good example of a basin peatland type that was first discovered in 1998. This paper provides baseline information on its flora, vegetation communities, structure, surface hydrology... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conductivity; European Habitats Directive; Hydrology; PH; Vegetation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000300022 |
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| 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 |
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| Mayal,Elga Miranda; Neumann-Leitão,Sigrid; Feitosa,Fernando Antônio do Nascimento; Schwamborn,Ralf; Silva,Tâmara de Almeida e; Silva-Cunha,Maria da Glória Gonçalves da. |
| This study provides baseline information on the hydrological conditions and on the coral and plankton communities at the Maracajaú reef ecosystem (Northeastern Brazil). Studies were performed from February to June 2000, covering the transition from dry to rainy season. In this area, there is an offshore coral reef formation, where corals were observed in loco; the water samples were collected to obtain the hydrological and plankton data. Six scleractinian species were identified. Stable isotope analysis on the carbonate fraction of Favia gravida fragments showed that these corals were under severe thermal stress. Chlorophyll-a varied from 1.1 to 9.3 mg m-3, with higher values during the rainy season. Average zooplankton wet weight biomass were 117.0... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coral reefs; Hydrology; Plankton; Thermal stress; Human impacts. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300019 |
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| Koening,Maria Luise; Macêdo,Silvio José de. |
| Quali-quantitative studies and hydrologic parameters were carried out in the profiles 6 (Orange) and 7 (Catuama) during the Victor Hensen cruise, in accordance with the bilateral scientific cooperation agreement Brazil/Germany. Hydrologically a zone of thermic and saline stability characterizes the superficial layer. The nutrient concentrations were generally low on the surface and higher at levels surpassing 100m in depth. 102 taxa were identified including diatoms (49), dinoflagellates (49), bluegreen algae (3), and euglenophyceae (1). The diversity and evenness were high, surpassing the environmental equilibrium. The clustering of samples showed evidence of 2 main groups, one encompassing the stations 32 and 38, characterized predominantly by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrology; Nutrients; Phytoplankton structure. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000400002 |
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| Mello,Carlos Rogério de; Curi,Nilton. |
| Pedology consists of a sub-area of Soil Science that studies the soil and its origin as well as its inter-relationship with the landscape. Hydrology is the science that studies the water in nature in its different mediums (atmosphere, soil and rock), using the watershed as a reference for analysis of the water dynamics and also its interaction with the landscape. The relationship between these two branches of knowledge has been the object of debate and analysis in recent years, contributing to the creation of a multidisciplinary science, which seeks to integrate the respective fields of research. As such, for Hydrology, Pedology has been fundamental for enabling a foundation for the processes associated to the generation of runoff and groundwater recharge,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrology; Pedology; Soil hydrology; Geomorfology. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000200001 |
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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: Folhetos |
Palavras-chave: Código Florestal; Área de proteção ambiental; Área de Preservação Permanete (APP); Geotécnica; Manejo florestal; Embrapa Acre; Forest biometry; Sistema de posicionamento global; Modeflora; Modelagem 3D; Manejo de precisão; Biometria florestal; Western Amazon; Amazônia Ocidental; Acre; Rio Branco (AC); Biometría forestal; Sistemas de posicionamiento global; Mapeamento; Agricultura de precisión; Cubierta (plantas); Inventario forestal; Ley ambiental; Manejo forestal; Sistemas de información geográfica; Teledetección; Agricultura de precisão; Inventário florestal; Administração florestal; Sensoriamento remoto; Sistema de informação geográfica; Hidrografia; Vegetação; Cartografia; Hidrologia; Precision agriculture; Forest management; Canopy; Environmental law; Cartography; Remote sensing; Global positioning systems; Geographic information systems; Forest inventory; Hydrology. |
| Ano: 2009 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/852921 |
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| GALDINO, S.; CLARKE, R. T.. |
| O nivel hidrometrico do rio Paraguai em Ladario, MS, medido pela regua instalada no 6. Distrito Naval da Marinha do Brasil, constitui o principal referencial do regime hidrologico da bacia do Alto Paraguai, possibilitando ate mesmo a caracterizacao de um dado periodo como sendo de seca ou de cheia no Pantanal. Quando o nivel maximo anual (pico ou ponta de cheia) e igual ou superior a cota de alerta de enchente do rio Paraguai em Ladario, ou seja 4,00 m, esse ano e considerado como sendo de cheia no Pantanal, caso contrario, como sendo de seca. Utilizando-se 34.607 registros diarios, relativos ao periodo de 01/01/1900 a 30/09/1994, foram realizados levantamentos e estudos estatisticos a nivel; diario, mensal e anual (ano hidrologico). Foram levantados... |
| Tipo: Livros |
Palavras-chave: Rio Paraguai; Nivel hidrometrico; Ladario; Mato Grosso do Sul; Brasil; Basin; Hydrometric level; River; Hidrologia; Brazil; Pantanal; Hydrology. |
| Ano: 1995 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/787815 |
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| Registros recuperados: 139 | |
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