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| Registros recuperados: 136 | |
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| Bhatt, Yogesh; Bossio, Deborah A.; Enfors, Elin; Gordon, Line; Kongo, Victor M.; Kosgei, Job Rotich; Makurira, Hodson; Masuki, Kenneth; Mul, Marloes; Tumbo, Siza D.. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Watershed management; Catchment areas; River basins; Hydrology; Models; Water harvesting; Crop production; Crop Production/Industries; Marketing; Production Economics; Resource /Energy Economics and Policy. |
| Ano: 2006 |
URL: http://purl.umn.edu/91943 |
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| Back,Álvaro José; Oliveira,José Luiz Rocha; Henn,Alan. |
| The purpose of this study was to adjust equations that establish relationships between rainfall events with different duration and data from weather stations in the state of Santa Catarina, Brazil. In this study, the relationships between different duration heavy rainfalls from 13 weather stations of Santa Catarina were analyzed. From series of maximum annual rainfalls, and using the Gumbel-Chow distribution, the maximum rainfall for durations between 5 min and 24 h were estimated considering return periods from 2 to 100 years. The data fit to the Gumbel-Chow model was verified by the Kolmogorov-Smirnov test at 5 % significance. The coefficients of Bell's equation were adjusted to estimate the relationship between rainfall duration t (min) and the return... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Design rainfall; Hydrology; Drainage. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000300031 |
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| Back,Álvaro José; Henn,Alan; Oliveira,José Luiz Rocha. |
| Knowledge of intensity-duration-frequency (IDF) relationships of rainfall events is extremely important to determine the dimensions of surface drainage structures and soil erosion control. The purpose of this study was to obtain IDF equations of 13 rain gauge stations in the state of Santa Catarina in Brazil: Chapecó, Urussanga, Campos Novos, Florianópolis, Lages, Caçador, Itajaí, Itá, Ponte Serrada, Porto União, Videira, Laguna and São Joaquim. The daily rainfall data charts of each station were digitized and then the annual maximum rainfall series were determined for durations ranging from 5 to 1440 min. Based on these, with the Gumbel-Chow distribution, the maximum rainfall was estimated for durations ranging from 5 min to 24 h, considering return... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy rainfall; Hydrology; Drainage. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600027 |
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| Ribeiro Filho,Jacques C.; Lemos Filho,Luis C. de A.; Santos,Julio C. N. dos; Brasil,José B.; Palácio,Helba A. de Q.. |
| ABSTRACT Information on hydrology, and vegetation distribution is essential for the development of techniques and strategies to cope with droughts in semi-arid environments. The objective of this study was to evaluate the partitioning of gross rainfall into throughfall, stemflow, and interception loss in the Brazilian Northeastern Atlantic Forest, and its correlations with rainfall characteristics. The study was conducted in the Bica watershed, in Portalegre, state of Rio Grande do Norte, Brazil. The work was carried out in 2017, with monitoring of the throughfall, stemflow, and interception loss in an area of 10 × 20 m. Total rainfall depths (TRD) and wind speed were measured, and the evapotranspiration (ET0) was estimated. Based on this information,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caatinga; Hydrology; Semi-arid; Principal component analysis. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000100021 |
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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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| Registros recuperados: 136 | |
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