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- W2973451759 abstract "The building of the Murum hydroelectric dam resulted in the formation of a reservoir in the year 2014. The newly formed reservoir can also serve as a cage aquaculture site in addition to fisheries. Therefore, it is important to determine the spatiotemporal profiles of water quality in the new reservoir and assess its suitability for fisheries and aquaculture. Water quality of riverine inflows and depth profiles of water quality in transitional and lacustrine zones were studied. Four samplings were conducted in 2017 at two stations each in the riverine and transitional zones, and three stations in the lacustrine zone. Results of the year-long study indicate that the riverine zone serves as the main input of suspended solids and organic matter to the reservoir which affected the pH and conductivity depth profiles particularly in the transitional zone due to anthropogenic activities in the river basin. Thermalstratification was apparent and consistent in the lacustrine zone throughout the year; whereas it wasless consistent in the transitional zone and varied between stations receiving different riverine inflows atdifferent times of the year. The colder sediment-laden inflows from the rivers influenced the depth profiles of the transitional and lacustrine zones especially after rainfall events. The DO values in transitional zone remained high due to the oxygenated riverine inflows. However, it dropped below the limit of 5 mg/L at the thermocline, and developed an anoxic condition at the deeper water column in the lacustrine zone throughout the year. A decrease in pH and an increase in conductivity, turbidity, TSS, CO2, BOD5, COD and TAN with depths were also observed in the lacustrine zone which are associatedwith the decomposition of organic matter and sedimentation. Since the depth of water column thatcontained healthy DO value of at least 5 mg/L for healthy life of aquatic organisms at the lacustrine zone was less than 1 m to 5 m coupled with the acidity of the water, it is not suitable for sensitive aquatic organism yet. At the riverine zone, even though DO is high, the high turbidity, TSS, and low pH render the water unsuitable for sensitive aquatic organisms. It is recommended that inputs of sediment and organic materials to the reservoir be reduced not only for the sustainability of the hydropower generation but also for fisheries and aquaculture development in the future." @default.
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- W2973451759 date "2019-07-01" @default.
- W2973451759 modified "2023-09-27" @default.
- W2973451759 title "Spatiotemporal profiles of water quality at a new large tropical hydroelectric dam reservoir" @default.
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