Changes in the hydro-sedimentary balance: Impacts of the use of a borrow pit in a low-order stream.

Construction of dams for hydroelectric power requires significant quantities of soil and rock, which are often extracted in borrow pits from adjacent regions. Although the effects of dams on stream processes has received significant attention, the effects of borrow pits has not. The main objective o...

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Autores principales:	Cláudio Tavares, Eneida M Eskinazi-Sant'Anna, Yuri A Figueiredo, Hernani A Almeida, Mariangela G P Leite
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/325309968e1a48d6bb38638a190c70f3
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spelling	oai:doaj.org-article:325309968e1a48d6bb38638a190c70f32021-12-02T20:18:30ZChanges in the hydro-sedimentary balance: Impacts of the use of a borrow pit in a low-order stream.1932-620310.1371/journal.pone.0255432https://doaj.org/article/325309968e1a48d6bb38638a190c70f32021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0255432https://doaj.org/toc/1932-6203Construction of dams for hydroelectric power requires significant quantities of soil and rock, which are often extracted in borrow pits from adjacent regions. Although the effects of dams on stream processes has received significant attention, the effects of borrow pits has not. The main objective of this study was to analyze the geomorphological and sedimentological aspects of two second-order streams, one of which was directly affected by the borrow pit located upstream of its source (Pedra Branca stream). Flow rates were measured and cross-sections of 600m stretches in both streams were monitored over a hydrological year. At the same time, sediments from the bed of the channels and soils on their banks had their physical and chemical characteristics evaluated. Streams sediments differed in their chemical and organic matter composition. The mean particle size of the sediment particles was different between the reference and degraded streams. The water flow was very similar to both streams, only varying along the seasonal seasons. However, the fluvial channels presented great geomorphological differentiation, mainly downstream, due to the location of the Pedra Branca stream and its proximity to the borrow pit. Despite the great importance for the production of clean electric energy, the construction of hydroelectric plants promotes persistent impacts that affect structural and functional aspects of the adjacent aquatic habitats. Borrow pits used for the construction of projects become large sources of sediment for aquatic environments, affecting the drainage network of the hydrographic basin and the balance of river erosion, transport and deposition processes. The results show the need to review the intervention protocols in borrow pits and the environmental legislation that regulates their rehabilitation.Cláudio TavaresEneida M Eskinazi-Sant'AnnaYuri A FigueiredoHernani A AlmeidaMariangela G P LeitePublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 8, p e0255432 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Cláudio Tavares Eneida M Eskinazi-Sant'Anna Yuri A Figueiredo Hernani A Almeida Mariangela G P Leite Changes in the hydro-sedimentary balance: Impacts of the use of a borrow pit in a low-order stream.
description	Construction of dams for hydroelectric power requires significant quantities of soil and rock, which are often extracted in borrow pits from adjacent regions. Although the effects of dams on stream processes has received significant attention, the effects of borrow pits has not. The main objective of this study was to analyze the geomorphological and sedimentological aspects of two second-order streams, one of which was directly affected by the borrow pit located upstream of its source (Pedra Branca stream). Flow rates were measured and cross-sections of 600m stretches in both streams were monitored over a hydrological year. At the same time, sediments from the bed of the channels and soils on their banks had their physical and chemical characteristics evaluated. Streams sediments differed in their chemical and organic matter composition. The mean particle size of the sediment particles was different between the reference and degraded streams. The water flow was very similar to both streams, only varying along the seasonal seasons. However, the fluvial channels presented great geomorphological differentiation, mainly downstream, due to the location of the Pedra Branca stream and its proximity to the borrow pit. Despite the great importance for the production of clean electric energy, the construction of hydroelectric plants promotes persistent impacts that affect structural and functional aspects of the adjacent aquatic habitats. Borrow pits used for the construction of projects become large sources of sediment for aquatic environments, affecting the drainage network of the hydrographic basin and the balance of river erosion, transport and deposition processes. The results show the need to review the intervention protocols in borrow pits and the environmental legislation that regulates their rehabilitation.
format	article
author	Cláudio Tavares Eneida M Eskinazi-Sant'Anna Yuri A Figueiredo Hernani A Almeida Mariangela G P Leite
author_facet	Cláudio Tavares Eneida M Eskinazi-Sant'Anna Yuri A Figueiredo Hernani A Almeida Mariangela G P Leite
author_sort	Cláudio Tavares
title	Changes in the hydro-sedimentary balance: Impacts of the use of a borrow pit in a low-order stream.
title_short	Changes in the hydro-sedimentary balance: Impacts of the use of a borrow pit in a low-order stream.
title_full	Changes in the hydro-sedimentary balance: Impacts of the use of a borrow pit in a low-order stream.
title_fullStr	Changes in the hydro-sedimentary balance: Impacts of the use of a borrow pit in a low-order stream.
title_full_unstemmed	Changes in the hydro-sedimentary balance: Impacts of the use of a borrow pit in a low-order stream.
title_sort	changes in the hydro-sedimentary balance: impacts of the use of a borrow pit in a low-order stream.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/325309968e1a48d6bb38638a190c70f3
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Changes in the hydro-sedimentary balance: Impacts of the use of a borrow pit in a low-order stream.

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