Water corrosivity of polluted reservoir and hydropower sustainability

Author:

Sunardi Sunardi,Ariyani Miranti,Agustian Mochammad,Withaningsih Susanti,Parikesit Parikesit,Juahir Hafizan,Ismail Azimah,Abdoellah Oekan S.

Abstract

AbstractReservoirs play a strategic role in the context of sustainable energy supply. Unfortunately, the majority of the reservoirs are facing water-quality degradation due to complex pollutants originating from activities both in the catchment and inside the reservoir. This research was aimed at assessing the extent of the water degradation, in terms of corrosivity level, and at examining its impacts on hydropower capacity and operation. Water quality data (total dissolved solids, pH, calcium, bicarbonate, and temperature) were obtained from 20 sampling stations in the Cirata Reservoir from 2007 to 2016. The results show that the river water is already corrosive (Langelier Saturation Index, LSI = − 0.21 to − 1.08), and, the corrosiveness becoming greater when entering the reservoir (LSI = − 0.52 to − 1.49). The water corrosivity has caused damage to the hydro-mechanical equipment and lowering production capacity. The external environment of the catchment hosts complex human activities, such as agriculture, land conversion, urban and industrial discharge, which have all played a major role in the water corrosiveness. Meanwhile, the internal environment, such as floating net cage aquaculture, has intensified the problem. As the water corrosiveness has increased, the maintenance of the hydro-mechanical facilities has also increased. Strategies must be applied as current conditions are certainly a threat to the sustainability of the hydropower operation and, hence, the energy supply.

Publisher

Springer Science and Business Media LLC

Subject

Multidisciplinary

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