Spatial variation in drainage characteristics and geomorphic instantaneous unit hydrograph (GIUH); implications for watershed management—A case study of the Varada River basin, Northern Karnataka

Bhagwat, Tejaswini Nikhil; Shetty, Amba; Hegde, V. S.

doi:10.1016/j.catena.2011.05.007

Cited by 44 publications

(15 citation statements)

References 25 publications

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“…Neste estudo, foram calculadas 15 variáveis morfométricas (Quadro 1), amplamente empregadas em estudos com análise morfométrica de bacias hidrográficas (e.g. Sreedevi et al, 2005;Mesa, 2006;Bhagwat et al, 2011;Patel et al, 2012). Para o cálculo das variáveis utilizou-se o mapeamento do relevo e da rede de drenagem, na escala 1:50.000, obtidos a partir da Base Cartográfica Vetorial Contínua do Rio Grande do Sul (Hasenack & Weber, 2010).…”

Section: Caracterização Morfométrica Das Sub-baciasunclassified

Análise morfométrica e de usos do solo da bacia hidrográfica do Arroio Candiota, RS, Brasil

et al. 2015

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O conhecimento dos fatores naturais e antrópicos que operam em escala de bacia hidrográfica é crucial para a gestão dos recursos hídricos, tendo em vista que os sistemas fluviais se organizam de forma hierárquica. Nesse sentido, este estudo tem por objetivo descrever as características morfométricas do relevo e da rede de drenagem, assim como, os usos do solo presentes na bacia hidrográfica do Arroio Candiota, RS, Brasil. Para isso, foram selecionadas 26 sub-bacias para análise de 15 variáveis morfométricas e oito classes de usos do solo. As sub-bacias em geral possuem riachos pouco sinuosos e baixa densidade de drenagem. Razão de circularidade, relação de relevo, declive e fator topográfico mostraram-se inversamente correlacionadas com a área das sub-bacias. Logo, as sub-bacias menores tendem a apresentar, no seu rio principal, um maior potencial de erosão e ser mais suscetíveis à inundação, pois é maior a probabilidade da sub-bacia inteira ser atingida simultaneamente pela chuva. A maior parte da bacia hidrográfica do Arroio Candiota (59,31 %), principalmente a sua metade leste, é ocupada por vegetação natural. As atividades de mineração e silvicultura estão mais associadas às regiões próximas às nascentes dos riachos enquanto agricultura e campo degradado se distribuem mais próximas ao curso principal do Arroio Candiota. Este estudo demonstra que as características morfométricas e os usos do solo variam espacialmente na bacia hidrográfica do Arroio Candiota e a distribuição de algumas atividades antrópicas está relacionada a características naturais, como relevo e disponibilidade hídrica.

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Section: Caracterização Morfométrica Das Sub-baciasunclassified

Análise morfométrica e de usos do solo da bacia hidrográfica do Arroio Candiota, RS, Brasil

et al. 2015

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“…Conversely, the evolution of the badlands in the Baza basin has, as in many others (Bhagwat et al, 2011), been delayed by the differential response to tectonic activity (García-Tortosa et al, 2011), with a more organized drainage network producing low viscosity water-flows, with few isolated ruiniforms (pipes, flutes). Thus, there are few deep walls in the Baza basin connected to the drainage network, and surfaces are prone to being washed, rather than receiving slow drippings of viscous fluids.…”

Section: Slipping and Geomorphological Evolutionmentioning

confidence: 95%

Features and evolution of slip structures in badlands areas (SE Spain)

Díaz-Hernández

Yepes

Díaz

et al. 2015

CATENA

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“…Therefore, geomorphology is added to the IUH by means of indices associated with the drainage network. Bhagwat et al (2011) stated that geomorphological IUH is important for programs linked to the watershed management when the absence of hydrological information is experienced. Yet, Ghumman et al (2011) pointed out that this IUH is a useful model for prediction of hydrographs in watersheds due to the recent advances in satellite imagery and tools for data processing.…”

Section: Physiographical Characteristics Of the Study Watershedsmentioning

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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Spatial variation in drainage characteristics and geomorphic instantaneous unit hydrograph (GIUH); implications for watershed management—A case study of the Varada River basin, Northern Karnataka

Cited by 44 publications

References 25 publications

Análise morfométrica e de usos do solo da bacia hidrográfica do Arroio Candiota, RS, Brasil

Análise morfométrica e de usos do solo da bacia hidrográfica do Arroio Candiota, RS, Brasil

Features and evolution of slip structures in badlands areas (SE Spain)

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

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