|
Registro Completo |
|
Biblioteca(s): |
Embrapa Pantanal; Embrapa Territorial. |
|
Data corrente: |
17/11/2020 |
|
Data da última atualização: |
17/11/2020 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
FANTIN-CRUZ, i.; OLIVEIRA, M. D. de; CAMPOS, J. A.; CAMPOS, M. M. de; RIBEIRO, L. de S.; MINGOTI, R.; SOUZA, M. L. de; PEDROLLO, O.; HAMILTON, S. K. |
|
Afiliação: |
IBRAIM FANTIN-CRUZ, Federal University of Mato Grosso, Cuiabá; MARCIA DIVINA DE OLIVEIRA, CPAP; JULIANA ANDRADE CAMPOS, Federal University of Rio Grande do Sul, Porto Alegre; MARCEL MEDINAS DE CAMPOS, Federal University of Mato Grosso, Cuiabá; LETÍCIA DE SOUZA RIBEIRO, Federal University of Mato Grosso, Cuiabá; RAFAEL MINGOTI, CNPM; MARCELO LUIZ DE SOUZA, Brazilian National Water Agency, ANA, Brasília; OLAVO PEDROLLO, Federal University of Rio Grande do Sul, Porto Alegre; STEPHEN K. HAMILTON, Michigan State University, Hickory Corners. |
|
Título: |
Further development of small hydropower facilities will significantly reduce sediment transport to the Pantanal wetland of Brazil. |
|
Ano de publicação: |
2020 |
|
Fonte/Imprenta: |
Frontiers in Environmental Science, v. 8, article 577748, p. 1-17, 2020. |
|
DOI: |
10.3389/fenvs.2020.577748 |
|
Idioma: |
Inglês
Português |
|
Conteúdo: |
Small hydropower (SHP) facilities, which are defined by installed capacities <10?50 MW, are increasingly being built around the world. SHPs are viewed as less environmentally harmful than larger dams, although there has been little research to support that assertion. Numerous SHPs have been built, and many more are in development or proposed, in rivers that drain into the Pantanal, a world-renowned floodplain wetland. Three river systems with the largest contributions of sediments to the Pantanal? the Cuiabá, upper Taquari, and Coxim rivers?remain largely undammed. The upland tributaries transport sediments into the Pantanal, thereby affecting geomorphological dynamics and biological productivity of downstream floodplains. This study presents measurements from upstream and downstream of current hydropower facilities, most of which are SHPs, throughout the upland watersheds of the Upper Paraguay River basin to reveal how these facilities may affect the transport of suspended sediments and of bedload sediments. In addition, a predictive model using artificial neural networks (ANNs) estimates the impact of building 80 future SHPs on sediment transport based on observations at current facilities as well as the spatial distribution of future facilities. More than half of current facilities retained suspended sediments: 14 of the 29 facilities showed >20% net retention of suspended sediments, two others retained between 10 and 20%, seven were within 10%, and six showed >10% net release. Bedload sediment transport was a small component of total sediment transport in rivers with high total sediment loads. Multiyear series of satellite images confirm sediment accumulation in several cases. Model predictions of the impacts of future hydropower facilities on suspended sediment concentrations and transport show retention of a large fraction (often much >20%) of sediment inputs. Summing riverine transport rates for inflows into the Pantanal indicates that currently envisioned future hydropower development would reduce the suspended sediment transport by 62% from the current rate. This study shows that if SHPs are built on sediment-rich rivers, this may prove problematic for the facilities as well as for downstream ecosystems. These results support recommendations that several river systems presently lacking dams in their lower reaches should be excluded from future hydropower development to maintain the sediment supply to the Pantanal. MenosSmall hydropower (SHP) facilities, which are defined by installed capacities <10?50 MW, are increasingly being built around the world. SHPs are viewed as less environmentally harmful than larger dams, although there has been little research to support that assertion. Numerous SHPs have been built, and many more are in development or proposed, in rivers that drain into the Pantanal, a world-renowned floodplain wetland. Three river systems with the largest contributions of sediments to the Pantanal? the Cuiabá, upper Taquari, and Coxim rivers?remain largely undammed. The upland tributaries transport sediments into the Pantanal, thereby affecting geomorphological dynamics and biological productivity of downstream floodplains. This study presents measurements from upstream and downstream of current hydropower facilities, most of which are SHPs, throughout the upland watersheds of the Upper Paraguay River basin to reveal how these facilities may affect the transport of suspended sediments and of bedload sediments. In addition, a predictive model using artificial neural networks (ANNs) estimates the impact of building 80 future SHPs on sediment transport based on observations at current facilities as well as the spatial distribution of future facilities. More than half of current facilities retained suspended sediments: 14 of the 29 facilities showed >20% net retention of suspended sediments, two others retained between 10 and 20%, seven were within 10%, and six showed >10% net re... Mostrar Tudo |
|
Thesagro: |
Barragem; Hidrelétrica; Sedimento. |
|
Thesaurus Nal: |
Dams (hydrology); Hydroelectric power; Sediments. |
|
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/217922/1/Hidropower-Transport-Pantanal-2020.pdf
|
|
Marc: |
LEADER 03402naa a2200301 a 4500
001 2126736
005 2020-11-17
008 2020 bl uuuu u00u1 u #d
024 7 $a10.3389/fenvs.2020.577748$2DOI
100 1 $aFANTIN-CRUZ, i.
245 $aFurther development of small hydropower facilities will significantly reduce sediment transport to the Pantanal wetland of Brazil.$h[electronic resource]
260 $c2020
520 $aSmall hydropower (SHP) facilities, which are defined by installed capacities <10?50 MW, are increasingly being built around the world. SHPs are viewed as less environmentally harmful than larger dams, although there has been little research to support that assertion. Numerous SHPs have been built, and many more are in development or proposed, in rivers that drain into the Pantanal, a world-renowned floodplain wetland. Three river systems with the largest contributions of sediments to the Pantanal? the Cuiabá, upper Taquari, and Coxim rivers?remain largely undammed. The upland tributaries transport sediments into the Pantanal, thereby affecting geomorphological dynamics and biological productivity of downstream floodplains. This study presents measurements from upstream and downstream of current hydropower facilities, most of which are SHPs, throughout the upland watersheds of the Upper Paraguay River basin to reveal how these facilities may affect the transport of suspended sediments and of bedload sediments. In addition, a predictive model using artificial neural networks (ANNs) estimates the impact of building 80 future SHPs on sediment transport based on observations at current facilities as well as the spatial distribution of future facilities. More than half of current facilities retained suspended sediments: 14 of the 29 facilities showed >20% net retention of suspended sediments, two others retained between 10 and 20%, seven were within 10%, and six showed >10% net release. Bedload sediment transport was a small component of total sediment transport in rivers with high total sediment loads. Multiyear series of satellite images confirm sediment accumulation in several cases. Model predictions of the impacts of future hydropower facilities on suspended sediment concentrations and transport show retention of a large fraction (often much >20%) of sediment inputs. Summing riverine transport rates for inflows into the Pantanal indicates that currently envisioned future hydropower development would reduce the suspended sediment transport by 62% from the current rate. This study shows that if SHPs are built on sediment-rich rivers, this may prove problematic for the facilities as well as for downstream ecosystems. These results support recommendations that several river systems presently lacking dams in their lower reaches should be excluded from future hydropower development to maintain the sediment supply to the Pantanal.
650 $aDams (hydrology)
650 $aHydroelectric power
650 $aSediments
650 $aBarragem
650 $aHidrelétrica
650 $aSedimento
700 1 $aOLIVEIRA, M. D. de
700 1 $aCAMPOS, J. A.
700 1 $aCAMPOS, M. M. de
700 1 $aRIBEIRO, L. de S.
700 1 $aMINGOTI, R.
700 1 $aSOUZA, M. L. de
700 1 $aPEDROLLO, O.
700 1 $aHAMILTON, S. K.
773 $tFrontiers in Environmental Science$gv. 8, article 577748, p. 1-17, 2020.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pantanal (CPAP) |
|
