Simulation of Runoff and Sediment Yield for a Kaneri Watershed Using SWAT Model

摘要

Watershedas an entry point acts as a beginning to address the issues of sustainable rainwatermanagement for improving livelihoods. Extraction of watershed parameters usingGeographical Information System (GIS) and use of simulation models is thecurrent trend for hydrologic evaluation of watersheds. In the present study,the open Source Tool Quantum GIS 2.2.0 was used for preparation of maps toverify the spatial extent of the area. The Soil and Water Assessment Tool(SWAT) having an interface with Arc-View GIS software (ArcGIS 10.1with Arc SWAT 2012 extension) was selected for the estimation of runoff andsediment yield from Kaneri watershed, located in Western Maharashtra region.The coefficient of determination (R2) for the monthly and yearlyrunoff was obtained as 0.849 and 0.951 respectively for the calibration period1979 to 2000 and 0.801 and 0.950 respectively for the validation period2001-2013. The R2 value in estimating the monthly and yearlysediment yield during calibration period was computed as 0.722 and 0.788respectively. The R2 for monthly and yearly sediment yield valuesfor validation period was observed to be 0.565 and 0.684 respectively.