Spatial discretization influence on flood modeling using unit hydrograph theory
ABSTRACT The Unit Hydrograph (UH) is the most popular method for flood related applications. There are several conceptual and geomorphological models based on UH and coupled with different spatial discretizations. However, there are few studies concerning the evaluation of UH models according to semi-distributed approaches. This study aimed to assess the influence of lumped and semi-distributed modeling on the applicability of Soil Conservation Service UH (SCS UH) and Clark’s Instantaneous UH (Clark’s IUH) for estimation of flood hydrographs. The methodological procedures were conducted in the Hydrological Modeling System (HEC-HMS) using rainfall-runoff events of a gauged watershed in Southern Brazil. The main conclusions were: a) CIUH under the semi-distributed approach provided slightly superior performance; b) CIUH was able to effectively estimate the direct surface runoff hydrographs even for long duration rainfall events; c) SCS UH presented more accurate hydrographs for lumped modeling; d) the Nelder and Mead algorithm may have limited application.
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Associação Brasileira de Recursos Hídricos
2019
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oai:scielo:S2318-033120190001002122019-04-01Spatial discretization influence on flood modeling using unit hydrograph theorySteinmetz,Alice AlonzoBeskow,SamuelTerra,Fabrício da SilvaNunes,Maria Cândida MoitinhoVargas,Marcelle MartinsHorn,João Francisco Carlexo Direct surface runoff Hydrological monitoring Lumped modeling Semi-distributed modeling HEC-HMS ABSTRACT The Unit Hydrograph (UH) is the most popular method for flood related applications. There are several conceptual and geomorphological models based on UH and coupled with different spatial discretizations. However, there are few studies concerning the evaluation of UH models according to semi-distributed approaches. This study aimed to assess the influence of lumped and semi-distributed modeling on the applicability of Soil Conservation Service UH (SCS UH) and Clark’s Instantaneous UH (Clark’s IUH) for estimation of flood hydrographs. The methodological procedures were conducted in the Hydrological Modeling System (HEC-HMS) using rainfall-runoff events of a gauged watershed in Southern Brazil. The main conclusions were: a) CIUH under the semi-distributed approach provided slightly superior performance; b) CIUH was able to effectively estimate the direct surface runoff hydrographs even for long duration rainfall events; c) SCS UH presented more accurate hydrographs for lumped modeling; d) the Nelder and Mead algorithm may have limited application.info:eu-repo/semantics/openAccessAssociação Brasileira de Recursos HídricosRBRH v.24 20192019-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312019000100212en10.1590/2318-0331.241920180143 |
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Steinmetz,Alice Alonzo Beskow,Samuel Terra,Fabrício da Silva Nunes,Maria Cândida Moitinho Vargas,Marcelle Martins Horn,João Francisco Carlexo |
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Steinmetz,Alice Alonzo Beskow,Samuel Terra,Fabrício da Silva Nunes,Maria Cândida Moitinho Vargas,Marcelle Martins Horn,João Francisco Carlexo Spatial discretization influence on flood modeling using unit hydrograph theory |
author_facet |
Steinmetz,Alice Alonzo Beskow,Samuel Terra,Fabrício da Silva Nunes,Maria Cândida Moitinho Vargas,Marcelle Martins Horn,João Francisco Carlexo |
author_sort |
Steinmetz,Alice Alonzo |
title |
Spatial discretization influence on flood modeling using unit hydrograph theory |
title_short |
Spatial discretization influence on flood modeling using unit hydrograph theory |
title_full |
Spatial discretization influence on flood modeling using unit hydrograph theory |
title_fullStr |
Spatial discretization influence on flood modeling using unit hydrograph theory |
title_full_unstemmed |
Spatial discretization influence on flood modeling using unit hydrograph theory |
title_sort |
spatial discretization influence on flood modeling using unit hydrograph theory |
description |
ABSTRACT The Unit Hydrograph (UH) is the most popular method for flood related applications. There are several conceptual and geomorphological models based on UH and coupled with different spatial discretizations. However, there are few studies concerning the evaluation of UH models according to semi-distributed approaches. This study aimed to assess the influence of lumped and semi-distributed modeling on the applicability of Soil Conservation Service UH (SCS UH) and Clark’s Instantaneous UH (Clark’s IUH) for estimation of flood hydrographs. The methodological procedures were conducted in the Hydrological Modeling System (HEC-HMS) using rainfall-runoff events of a gauged watershed in Southern Brazil. The main conclusions were: a) CIUH under the semi-distributed approach provided slightly superior performance; b) CIUH was able to effectively estimate the direct surface runoff hydrographs even for long duration rainfall events; c) SCS UH presented more accurate hydrographs for lumped modeling; d) the Nelder and Mead algorithm may have limited application. |
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Associação Brasileira de Recursos Hídricos |
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2019 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312019000100212 |
work_keys_str_mv |
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1756441140565901312 |