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Water 2016, 8(11), 489; doi:10.3390/w8110489

The Mitigation Potential of Buffer Strips for Reservoir Sediment Yields: The Itumbiara Hydroelectric Power Plant in Brazil

1
Eletrobras Furnas, Pontifical Catholic University of Goiás, BR153, km 510, Zona Rural, Aparecida de Goiânia-Goiás CEP 74923-650, Brazil
2
School of Energy, Geoscience, Infrastructure and Society, Heriot-Watt University, Edinburgh EH14 4AS, UK
3
Pontifical Catholic University of Goiás, Av. Universitária 1.440, Setor Universitário, Goiânia-Goiás CEP 74605-010, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Karim Abbaspour
Received: 5 August 2016 / Revised: 21 October 2016 / Accepted: 25 October 2016 / Published: 28 October 2016
View Full-Text   |   Download PDF [6334 KB, uploaded 28 October 2016]   |  

Abstract

Soil erosion and deposition mechanisms play a crucial role in the sustainability of both existing reservoirs and newly planned projects. Soil erosion is one of the most important factors influencing sediment transport yields, and, in the context of existing reservoirs, the surrounding watersheds supply both runoff and sediment yield to the receiving water body. Therefore, appropriate land management strategies are needed to minimize the influence of sediment yields on reservoir volume and, hence, the capacity of power generation. In this context, soil erosion control measures such as buffer strips may provide a practical and low-cost option for large reservoirs, but need to be tested at the catchment scale. This paper represents a study case for the Itumbiara hydroelectric power plant (HPP) in Brazil. Four different scenarios considering radially planted buffer strips of Vetivergrass with widths of 20 m, 40 m, 100 m and 200 m are analyzed. A semi-distributed hydrological model, SWAT, was used to perform the simulations. Results indicate a reduction of sediments transported to the reservoir of between 0.2% and 1.0% per year is possible with buffer strip provision, and that this reduction, over the life of Itumbiara HPP, may prove important for lengthening the productivity of the plant. View Full-Text
Keywords: sediments; Indian grass; reservoir; SWAT; Brazil sediments; Indian grass; reservoir; SWAT; Brazil
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Luz, M.P.; Beevers, L.C.; Cuthbertson, A.J.S.; Medero, G.M.; Dias, V.S.; Nascimento, D.T.F. The Mitigation Potential of Buffer Strips for Reservoir Sediment Yields: The Itumbiara Hydroelectric Power Plant in Brazil. Water 2016, 8, 489.

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