Spatial discretization influence on flood modeling using unit hydrograph theory

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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Main Authors: Steinmetz,Alice Alonzo, Beskow,Samuel, Terra,Fabrício da Silva, Nunes,Maria Cândida Moitinho, Vargas,Marcelle Martins, Horn,João Francisco Carlexo
Format: Digital revista
Language:English
Published: Associação Brasileira de Recursos Hídricos 2019
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312019000100212
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spelling 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
institution SCIELO
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country Brasil
countrycode BR
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access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Steinmetz,Alice Alonzo
Beskow,Samuel
Terra,Fabrício da Silva
Nunes,Maria Cândida Moitinho
Vargas,Marcelle Martins
Horn,João Francisco Carlexo
spellingShingle 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.
publisher Associação Brasileira de Recursos Hídricos
publishDate 2019
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312019000100212
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