Abstract
In this paper the Soil and Water Assessment Tool (SWAT) was used to simulate the runoff and sediment that is coming into the Tilaiya Reservoir, Jharkhand, India. In this twenty first century, it is widely accepted that climate change would significantly affect many hydrologic systems which in turn would affect the water availability, overland flow and the flow discharges in rivers. Surface runoff estimation in a catchment based on the rate of storm precipitation and also discharge estimation at outlet is important in hydrologic studies. The research was conducted using a 10-year historical stream-flow record from 1991-2000; the data from 1991 to 1995 was used for calibration and the data from 1996 to 2000 was used for validation. From the sediment inflow data that we obtained from the SWAT model output, the reservoir life was calculated i.e. the time required to fill the reservoir up to its dead storage; in the study it was found out to be 89 years from the year 2000.
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