Peak Flows and Stormwater Networks Design—Current and Future Management of Urban Surface Watersheds
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/107419 https://doi.org/10.3390/w11040759 |
Resumo: | Stormwater urban drainage systems are typically designed in open channel flow. Pipe sewers must have enough capacity to transport maximum design flows for a given frequency of the project rainfall. The classic rational method or related procedures that are based on rational approaches are still currently used to a great extent, particularly for small urban drainage basins, and the pipes are frequently designed in uniform steady flow. Numerical integration of Saint-Venant equations for one-dimensional gradually varied unsteady flow allows the computation of waves’ progression along the pipes for given input surface hydrographs. This paper presents a comprehensive, systematic, simple, and original comparison between the peak flows that are achieved through simulation in unsteady flow using an implicit complete dynamic model, developed in the Laboratory of Hydraulics, Water Resources and Environment of Coimbra University, and those that are obtained with the classic rational method along urban drainage networks. Boundary conditions and some approximations typically considered in the methodologies are analyzed in detail. Classic rational approaches may underestimate the peak and design flows. Practical recommendations for the system design phase when rational approaches are used are also proposed. The need for indispensable requirements for suitable urbanization rules, intelligent management of surface runo in urban basins, and control measures for the reduction of peak flows entering existing networks is confirmed and reinforced. |
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Peak Flows and Stormwater Networks Design—Current and Future Management of Urban Surface Watershedsurban drainage networksopen channel flowstormwater peak flowssimulation in unsteady flowclassic rational methodurban watersheds managementStormwater urban drainage systems are typically designed in open channel flow. Pipe sewers must have enough capacity to transport maximum design flows for a given frequency of the project rainfall. The classic rational method or related procedures that are based on rational approaches are still currently used to a great extent, particularly for small urban drainage basins, and the pipes are frequently designed in uniform steady flow. Numerical integration of Saint-Venant equations for one-dimensional gradually varied unsteady flow allows the computation of waves’ progression along the pipes for given input surface hydrographs. This paper presents a comprehensive, systematic, simple, and original comparison between the peak flows that are achieved through simulation in unsteady flow using an implicit complete dynamic model, developed in the Laboratory of Hydraulics, Water Resources and Environment of Coimbra University, and those that are obtained with the classic rational method along urban drainage networks. Boundary conditions and some approximations typically considered in the methodologies are analyzed in detail. Classic rational approaches may underestimate the peak and design flows. Practical recommendations for the system design phase when rational approaches are used are also proposed. The need for indispensable requirements for suitable urbanization rules, intelligent management of surface runo in urban basins, and control measures for the reduction of peak flows entering existing networks is confirmed and reinforced.MDPI2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/107419http://hdl.handle.net/10316/107419https://doi.org/10.3390/w11040759eng2073-4441Diogo, António FreireCarmo, José Antunes doinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-10T10:27:50Zoai:estudogeral.uc.pt:10316/107419Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:23:46.568711Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Peak Flows and Stormwater Networks Design—Current and Future Management of Urban Surface Watersheds |
title |
Peak Flows and Stormwater Networks Design—Current and Future Management of Urban Surface Watersheds |
spellingShingle |
Peak Flows and Stormwater Networks Design—Current and Future Management of Urban Surface Watersheds Diogo, António Freire urban drainage networks open channel flow stormwater peak flows simulation in unsteady flow classic rational method urban watersheds management |
title_short |
Peak Flows and Stormwater Networks Design—Current and Future Management of Urban Surface Watersheds |
title_full |
Peak Flows and Stormwater Networks Design—Current and Future Management of Urban Surface Watersheds |
title_fullStr |
Peak Flows and Stormwater Networks Design—Current and Future Management of Urban Surface Watersheds |
title_full_unstemmed |
Peak Flows and Stormwater Networks Design—Current and Future Management of Urban Surface Watersheds |
title_sort |
Peak Flows and Stormwater Networks Design—Current and Future Management of Urban Surface Watersheds |
author |
Diogo, António Freire |
author_facet |
Diogo, António Freire Carmo, José Antunes do |
author_role |
author |
author2 |
Carmo, José Antunes do |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Diogo, António Freire Carmo, José Antunes do |
dc.subject.por.fl_str_mv |
urban drainage networks open channel flow stormwater peak flows simulation in unsteady flow classic rational method urban watersheds management |
topic |
urban drainage networks open channel flow stormwater peak flows simulation in unsteady flow classic rational method urban watersheds management |
description |
Stormwater urban drainage systems are typically designed in open channel flow. Pipe sewers must have enough capacity to transport maximum design flows for a given frequency of the project rainfall. The classic rational method or related procedures that are based on rational approaches are still currently used to a great extent, particularly for small urban drainage basins, and the pipes are frequently designed in uniform steady flow. Numerical integration of Saint-Venant equations for one-dimensional gradually varied unsteady flow allows the computation of waves’ progression along the pipes for given input surface hydrographs. This paper presents a comprehensive, systematic, simple, and original comparison between the peak flows that are achieved through simulation in unsteady flow using an implicit complete dynamic model, developed in the Laboratory of Hydraulics, Water Resources and Environment of Coimbra University, and those that are obtained with the classic rational method along urban drainage networks. Boundary conditions and some approximations typically considered in the methodologies are analyzed in detail. Classic rational approaches may underestimate the peak and design flows. Practical recommendations for the system design phase when rational approaches are used are also proposed. The need for indispensable requirements for suitable urbanization rules, intelligent management of surface runo in urban basins, and control measures for the reduction of peak flows entering existing networks is confirmed and reinforced. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/107419 http://hdl.handle.net/10316/107419 https://doi.org/10.3390/w11040759 |
url |
http://hdl.handle.net/10316/107419 https://doi.org/10.3390/w11040759 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2073-4441 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799134124377636864 |