Estimativa do escoamento superficial em uma bacia hidrográfica com base em modelagem dinâmica e distribuída

Beskow, Samuel; Mello, Carlos Rogério de; Coelho, Gilberto; Silva, Antônio Marciano da; Viola, Marcelo Ribeiro

doi:10.1590/s0100-06832009000100018

Cited by 22 publications

(14 citation statements)

References 14 publications

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“…Esse modelo foi amplamente utilizado nos estudos que envolvem a estimativa do escoamento superficial (Pruski et al, 2001;Beskow et al, 2009) e nos de manejo e conservação do solo (Endale et al, 2011). Esse método é amplamente utilizado dado à sua parcimoniosidade, pois utiliza um único parâmetro para representar a abstração de água no ambiente que não gera escoamento superficial.…”

Section: Modelo Da Curva Número (Cn)unclassified

Estimativa da infiltração de água no solo na escala de bacia hidrográfica

Barros

Minella

Tassi

et al. 2014

Rev. Bras. Ciênc. Solo

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RESUMOA variabilidade espacial das características do solo torna a estimativa da infiltração de água altamente dependente da escala de análise. Muitos trabalhos necessitam de informações da dinâmica da infiltração para descrever o mecanismo de outros processos associados à água, aos sedimentos ou aos solutos. O objetivo deste trabalho foi utilizar duas estratégias metodológicas para a estimativa da infiltração na escala de bacia. Os parâmetros de dois modelos de infiltração foram ajustados a um conjunto de dados coletados durante dois anos de monitoramento, em 77 eventos de chuva-vazão ocorridos sob diferentes condições de uso e manejo do solo numa bacia hidrográfica rural de 1,2 km 2 . Os resultados dos ajustes para os dois modelos de infiltração na escala de bacia foram comparados com aqueles obtidos para dois métodos pontuais de estimativa da infiltração. Com o conjunto de dados do monitoramento, foi possível definir um modelo de infiltração para a bacia monitorada. Além disso, os resultados indicaram que a comparação realizada entre os valores dos modelos com os pontuais são fortemente dependentes da escala de análise; isto é, as medidas pontuais revelaram valores médios de taxa de infiltração alta para a bacia em estudo. Todavia, observações no campo indicaram baixa infiltração, principalmente nas áreas saturadas onde condicionam o escoamento superficial nessa bacia, ao contrário dos resultados pelos modelos de estimativa, que apresentaram menor ordem de magnitude dos valores estimados de infiltração, em razão, entre outros, da maior incorporação dos fatores controladores do processo em seu método.

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Section: Modelo Da Curva Número (Cn)unclassified

Estimativa da infiltração de água no solo na escala de bacia hidrográfica

Barros

Minella

Tassi

et al. 2014

Rev. Bras. Ciênc. Solo

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“…Given the necessity of runoff separation for UH and IUH modeling, in this study a methodology based on two inflexion points, defining the start and the end of direct surface runoff, was employed (Agirre et al 2005, Choi et al 2011 and the corresponding effective rainfall (R e ) was then determined for each event (R e = DSR depth). The R e hyetographs were determined using the Curve Number method (SCS 1971) following the procedures recommended by Chow et al (1988) and applied in many flood modeling sudies (Beskow et al 2009, Choi et al 2011, López et al 2012. Initial abstraction (I a ) was considered as the cumulative rainfall until the start time of the DSR observed on the hydrograph and the corresponding Curve Number (CN) was adjusted for each event.…”

Section: Hydrological and Meteorological Data Setsmentioning

confidence: 99%

Geomorphology-based unit hydrograph models for flood risk management: case study in Brazilian watersheds with contrasting physiographic characteristics

Beskow

Nunes

Mello

et al. 2018

An. Acad. Bras. Ciênc.

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Heavy rainfall in conjunction with an increase in population and intensification of agricultural activities have resulted in countless problems related to flooding in watersheds. Among the techniques available for direct surface runoff (DSR) modeling and flood risk management are the Unit Hydrograph (UH) and Instantaneous Unit Hydrograph (IUH). This study focuses on the evaluation of predictive capability of two conceptual IUH models (Nash and Clark), considering their original (NIUH and CIUH) and geomorphological approaches (NIUHGEO and CIUHGEO), and their advantages over two traditional synthetics UH models - Triangular (TUH) and Dimensionless (DUH), to estimate DSR hydrographs taking as reference two Brazilian watersheds with contrasting geomorphological and climatic characteristics. The main results and conclusions were: i) there was an impact of the differences in physiographical characteristics between watersheds, especially those parameters associated with soil; the dominant rainfall patterns in each watershed had an influence on flood modeling; and ii) CIUH was the most satisfactory model for both watersheds, followed by NIUH, and both models had substantial superiority over synthetic models traditionally employed; iii) although geomorphological approaches for IUH had performances slightly better than TUH and DUH, they should not be considered as standard tools for flood modeling in these watersheds.

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“…These conditions, always worth emphasizes, reflect the date of obtainment of the Landsat digital image and allocation of soil type which, in this case, considered only the soil texture. BESKOW et al (2009) recommended considering the infiltration rate of water as the main criterion for choosing the group of tropical soils, since the structure interferes making the soil with high clay content very permeable. More reasonable results may be obtained considering other characteristics such as soil permeability and depth discrimination of the type of the soil.…”

Section: Spatial Distribution Of the Curve Numbermentioning

confidence: 99%

Georeferenced database generation with the purpose of hydrologic molding in reservoirs of the hydrographic basin of Jaguaribe river in the state of Ceará, Brazil

et al. 2013

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ABSTRACT:The edafoclimatic conditions of the Brazilian semiarid region favor the water loss by surface runoff. The state of Ceará, almost completely covered by semiarid, has developed public policies for the construction of dams in order to attend the varied water demand. Several hydrological models were developed to support decisive processes in the complex management of reservoirs. This study aimed to establish a methodology for obtaining a georeferenced database suitable for use as input data in hydrological modeling in the semiarid of Ceará. It was used images of Landsat satellite and SRTM Mission, and soil maps of the state of Ceará. The Landsat images allowed the determination of the land cover and the SRTM Mission images, the automatic delineation of hydrographic basins. The soil type was obtained through the soil map. The database was obtained for Jaguaribe River hydrographic basin, in the state of Ceará, and is applicable to hydrological modeling based on the Curve Number method for estimating the surface runoff.

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Estimativa do escoamento superficial em uma bacia hidrográfica com base em modelagem dinâmica e distribuída

Cited by 22 publications

References 14 publications

Estimativa da infiltração de água no solo na escala de bacia hidrográfica

Estimativa da infiltração de água no solo na escala de bacia hidrográfica

Geomorphology-based unit hydrograph models for flood risk management: case study in Brazilian watersheds with contrasting physiographic characteristics

Georeferenced database generation with the purpose of hydrologic molding in reservoirs of the hydrographic basin of Jaguaribe river in the state of Ceará, Brazil

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