Volume 8, Issue 6, December 2020, Page: 125-134
Estimation of Runoff and Sediment Yield Using SWAT Model: The Case of Katar Watershed, Rift Valley Lake Basin of Ethiopia
Dulo Husen, Oromia Agricultural Research Institute, Adami Tulu Agricultural Research Center, Adami Tulu, Ethiopia
Brook Abate, College of Architecture and Civil Engineering, Addis Ababa Science and Technology University (ASTU), Addis Ababa, Ethiopia
Received: Sep. 16, 2020;       Accepted: Sep. 28, 2020;       Published: Nov. 19, 2020
DOI: 10.11648/j.ijmea.20200806.11      View  14      Downloads  20
Estimating runoff and sediment yield at watershed level is important for better understanding of hydrologic processes and identifying hotspot area by using Soil and Water Assessment Tool (SWAT) model for intervention strategies. From the result of Global sensitivity analysis, 12 highly sensitive parameters identified. The obtained results were satisfactory for the gauging station (coefficient of determination (R2)=0.8, Nash-Sutcliffe Efficiency (NSE)=0.6 and percent difference or percent bias (PBIAS)=0) from 1990 to 2005(16) years used calibration and (R2=0.6, ENS=0.55and PBIAS=1.2) from 2006 to 2013(8 year) were used for validation period respectively. Among all sub-watersheds, nine sub watersheds were more vulnerable to soil loss and potentially prone to erosion risk, which was out of range of tolerable soil loss rate (18 tha-1yr-1). In conclusion, the SWAT model could be effectively used to estimate runoff and sediment yield; and identified hotspot area. In addition, the result could help different stakeholders to plan and implement appropriate interventions strategies in the Katar watershed.
Runoff, Sediment Yield, SWAT, Calibration and Validation
To cite this article
Dulo Husen, Brook Abate, Estimation of Runoff and Sediment Yield Using SWAT Model: The Case of Katar Watershed, Rift Valley Lake Basin of Ethiopia, International Journal of Mechanical Engineering and Applications. Vol. 8, No. 6, 2020, pp. 125-134. doi: 10.11648/j.ijmea.20200806.11
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