Abstract
Studies about river water quality are essential since the decreasing of water quality could threaten hydrology watershed function. The objective of this study was to identify water quality in rainy and dry seasons of Cidurian watershed. Water quality data were obtained from Main River Basin Organization Territory Cidanau – Ciujung – Cidurian for 2018 and 2019. The parameters of water quality consist of total suspended solids (TSS), pH, dissolved oxygen (DO), chemical oxygen demand (COD), biochemical oxygen demand (BOD), phosphate (PO4), nitrite (NO2 – N), electrical conductivity (EC), temperature, Ca, and Mg. Water sampling location were in Jasinga (upstream), Neglasari (middle stream), Rancasumur (middle stream), and Tanara (downstream). The result showed that TSS concentration showed higher in rainy season than dry season in all sampling points with values higher than river water quality standard 50 mg/L. Therefore, need attention to adopt soil conservation practices in mixed tree crops, dry cultivation land, and crop plantation to decrease soil erosion. Downstream had values of pH, DO, COD, and BOD outside of water quality standards. Accordingly, government should issue some policies to protect from decreasing water quality. The information on river water quality in Cidurian watershed could support better watershed management for sustainable hydrology watershed function.
Highlights
The river water condition is determined by the relationship between climate, anthropogenic activities and natural processes [1]
The study area was in the Cidurian watershed, where administrative locations belong to Banten and West Java Provinces of Indonesia (Fig. 1)
Cibeureum and Cilalay sub-watersheds were in the middle stream, while Cikande and Cidurian Hilir sub-watersheds in downstream
Summary
The river water condition is determined by the relationship between climate, anthropogenic activities and natural processes [1]. Land use change as a result of human activities, urban development, and industry has impacts on high surface runoff and floods [2,3]. As a rapidly developing area related human activities, needs concern for its future as a drinking water source, irrigation, and supporting domestic purposes. Adoption land management could decline discharge flow and minimize flood and sedimentation. Watershed management is necessary due to various activities such as agriculture, residential, industry, and plantation impacts on river water quality.
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