Combined effect of land use/cover types and slope gradient in sediment and nutrient losses in Chancho and Sorga sub watersheds, East Wollega Zone, Oromia, Ethiopia

Environmental Systems Research

Table 3 Evaluation of the accuracy of the SWAT model

Variables	Periods	Coefficient of determination (R²)	Nash–Sutcliffe coefficients (ENS)	Relative errors (RE)
River flow	Calibration	0.91	0.96	0.5
River flow	Validation	0.83	0.74	0.21
Sediment flow	Calibration	0.88	0.89	0.3
Sediment flow	Validation	0.81	0.68	0.211