WATER QUALITY AND PHYTOPLANKTON RESPONSES TO FLOW REDUCTION AND SEDIMENT LOAD RECEPTION IN THE XINGÓ/AL RESERVOIR
Keywords:
Redução de vazão, Descarga de sedimento, Qualidade da água e Reservatório de XingóAbstract
In the semi-arid region of northeastern Brazil, the Xingó reservoir is the last of a series of cascading reservoirs in the São Francisco river basin. From the perspective of river flow, the sharp reduction of rainfall in 2012 promoted the program of average flow reduction from 2013, contextualized by the most severe reduction in flow over the last hundred years. In 2015 a bottom discharge was given to the Delmiro Gouveia reservoir for the Xingó reservoir, raising concern about the effects of these actions on the water quality of this reservoir. Given the complexity of water quality variations in aquatic ecosystems, it is necessary to expand the panorama of physical and chemical responses of reservoir waters inserted in cascade systems. This article aims to evaluate the effects of average flow reduction, in the period from 2010 to 2015 of the São Francisco River basin, and of bottom discharge on the quality of Xingó reservoir water, also used for human supply. For this purpose, secondary data on rainfall, flow and water quality were collected by CHESF at three monitoring points on the Lake, representative of the anterior, intermediate and posterior parts. The results showed that the event of flow reduction allied to upstream sediment discharge led to an increase in temperature and alteration in nutrient concentration with consequent proliferation of cyanobacteria.
Downloads
Published
Issue
Section
License
Copyright (c) 2020 Revista de Gestão de Água da América Latina (Water Management Journal in Latin America)
This work is licensed under a Creative Commons Attribution 4.0 International License.
When sending the manuscript, notice that:
To be responsible for the other authors, when applicable, as co-responsible for the technical and scientific content of the article according to Article 5 of Brazilian Law N. 9610, regarding Copyright.
All statements published in the manuscript are the sole responsibility of the authors. However, all published material becomes the property of REGA, which reserves the copyright. Therefore, no material published in REGA may be reproduced without the written permission of REGA. All authors of articles submitted to REGA must sign a Copyright Transfer Agreement, which will take effect from the date of acceptance of the article. This term will be requested by REGA prior to the publication of the article. The author responsible for the article will receive, free of charge, the electronic record of the publication (in PDF format).
All articles published open access will be immediately and permanently free for everyone to read, download, copy and distribute. Permitted reuse is defined by your choice of one of the following user licenses:
Creative Commons Attribution (CC BY): lets others distribute and copy the article, to create extracts, abstracts, and other revised versions, adaptations or derivative works of or from an article (such as a translation), to include in a collective work (such as an anthology), to text or data mine the article, even for commercial purposes, as long as they credit the author(s), do not represent the author as endorsing their adaptation of the article, and do not modify the article in such a way as to damage the author’s honor or reputation.
Author Rights
For open access publishing this journal uses an exclusive licensing agreement. Authors will retain copyright alongside scholarly usage rights and REGA will be granted publishing and distribution rights.
Author Self-Archiving Policy
This journal permits and encourages authors to post items submitted to the journal on personal websites and institutional or funder repositories after publication. The final published PDF version should be used and bibliographic details that credit the publication in this journal should be included.
