Impact of large reservoirs on simulated discharges of Brazilian rivers
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | RBRH (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312020000100212 |
Resumo: | ABSTRACT Tens of thousands of dams were built around the world to reduce flood risks, produce energy, and maximize benefits of limited freshwater resources. In Brazil, the main and largest reservoirs are related to hydropower plants. Improving the understanding of reservoir dynamics is important not only to evaluate their impact in the flow regime of Brazilian rivers, but also to simulate the combined effect of constructing new dams and potential alterations under future climatic conditions. Here, we analyze how an ideal representation of reservoirs in terms of forced discharge would improve a previously calibrated hydrological model under the Brazilian domain. We forced the continental-scale version of the MGB model on observed reservoir outflows from 109 hydropower dams, which are part of the Brazilian National Interconnected System controlled by the National Electrical System Operator. Model simulated flows were replaced by the reservoir outflows in all dam locations and were compared to the original discharge in downstream gauges. The forced discharge simulation presented a mean improvement for Kling-Gupta Efficiency of 21%, when compared to the original model (naturalized flow). This analysis is a preliminary step towards an explicit representation of the reservoirs in the model, what will be conducted in a future study. |
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Impact of large reservoirs on simulated discharges of Brazilian riversHydrologic modelingReservoirsLarge-scale hydrologyMGB, BrazilABSTRACT Tens of thousands of dams were built around the world to reduce flood risks, produce energy, and maximize benefits of limited freshwater resources. In Brazil, the main and largest reservoirs are related to hydropower plants. Improving the understanding of reservoir dynamics is important not only to evaluate their impact in the flow regime of Brazilian rivers, but also to simulate the combined effect of constructing new dams and potential alterations under future climatic conditions. Here, we analyze how an ideal representation of reservoirs in terms of forced discharge would improve a previously calibrated hydrological model under the Brazilian domain. We forced the continental-scale version of the MGB model on observed reservoir outflows from 109 hydropower dams, which are part of the Brazilian National Interconnected System controlled by the National Electrical System Operator. Model simulated flows were replaced by the reservoir outflows in all dam locations and were compared to the original discharge in downstream gauges. The forced discharge simulation presented a mean improvement for Kling-Gupta Efficiency of 21%, when compared to the original model (naturalized flow). This analysis is a preliminary step towards an explicit representation of the reservoirs in the model, what will be conducted in a future study.Associação Brasileira de Recursos Hídricos2020-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312020000100212RBRH v.25 2020reponame:RBRH (Online)instname:Associação Brasileira de Recursos Hídricos (ABRH)instacron:ABRH10.1590/2318-0331.252020190084info:eu-repo/semantics/openAccessPassaia,Otávio AugustoSiqueira,Vinícius AlencarBrêda,João Paulo Lyra FialhoFleischmann,Ayan SantosPaiva,Rodrigo Cauduro Dias deeng2020-03-25T00:00:00Zoai:scielo:S2318-03312020000100212Revistahttps://www.scielo.br/j/rbrh/https://old.scielo.br/oai/scielo-oai.php||rbrh@abrh.org.br2318-03311414-381Xopendoar:2020-03-25T00:00RBRH (Online) - Associação Brasileira de Recursos Hídricos (ABRH)false |
dc.title.none.fl_str_mv |
Impact of large reservoirs on simulated discharges of Brazilian rivers |
title |
Impact of large reservoirs on simulated discharges of Brazilian rivers |
spellingShingle |
Impact of large reservoirs on simulated discharges of Brazilian rivers Passaia,Otávio Augusto Hydrologic modeling Reservoirs Large-scale hydrology MGB, Brazil |
title_short |
Impact of large reservoirs on simulated discharges of Brazilian rivers |
title_full |
Impact of large reservoirs on simulated discharges of Brazilian rivers |
title_fullStr |
Impact of large reservoirs on simulated discharges of Brazilian rivers |
title_full_unstemmed |
Impact of large reservoirs on simulated discharges of Brazilian rivers |
title_sort |
Impact of large reservoirs on simulated discharges of Brazilian rivers |
author |
Passaia,Otávio Augusto |
author_facet |
Passaia,Otávio Augusto Siqueira,Vinícius Alencar Brêda,João Paulo Lyra Fialho Fleischmann,Ayan Santos Paiva,Rodrigo Cauduro Dias de |
author_role |
author |
author2 |
Siqueira,Vinícius Alencar Brêda,João Paulo Lyra Fialho Fleischmann,Ayan Santos Paiva,Rodrigo Cauduro Dias de |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Passaia,Otávio Augusto Siqueira,Vinícius Alencar Brêda,João Paulo Lyra Fialho Fleischmann,Ayan Santos Paiva,Rodrigo Cauduro Dias de |
dc.subject.por.fl_str_mv |
Hydrologic modeling Reservoirs Large-scale hydrology MGB, Brazil |
topic |
Hydrologic modeling Reservoirs Large-scale hydrology MGB, Brazil |
description |
ABSTRACT Tens of thousands of dams were built around the world to reduce flood risks, produce energy, and maximize benefits of limited freshwater resources. In Brazil, the main and largest reservoirs are related to hydropower plants. Improving the understanding of reservoir dynamics is important not only to evaluate their impact in the flow regime of Brazilian rivers, but also to simulate the combined effect of constructing new dams and potential alterations under future climatic conditions. Here, we analyze how an ideal representation of reservoirs in terms of forced discharge would improve a previously calibrated hydrological model under the Brazilian domain. We forced the continental-scale version of the MGB model on observed reservoir outflows from 109 hydropower dams, which are part of the Brazilian National Interconnected System controlled by the National Electrical System Operator. Model simulated flows were replaced by the reservoir outflows in all dam locations and were compared to the original discharge in downstream gauges. The forced discharge simulation presented a mean improvement for Kling-Gupta Efficiency of 21%, when compared to the original model (naturalized flow). This analysis is a preliminary step towards an explicit representation of the reservoirs in the model, what will be conducted in a future study. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312020000100212 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2318-03312020000100212 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/2318-0331.252020190084 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Recursos Hídricos |
publisher.none.fl_str_mv |
Associação Brasileira de Recursos Hídricos |
dc.source.none.fl_str_mv |
RBRH v.25 2020 reponame:RBRH (Online) instname:Associação Brasileira de Recursos Hídricos (ABRH) instacron:ABRH |
instname_str |
Associação Brasileira de Recursos Hídricos (ABRH) |
instacron_str |
ABRH |
institution |
ABRH |
reponame_str |
RBRH (Online) |
collection |
RBRH (Online) |
repository.name.fl_str_mv |
RBRH (Online) - Associação Brasileira de Recursos Hídricos (ABRH) |
repository.mail.fl_str_mv |
||rbrh@abrh.org.br |
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1754734701953679360 |