Modeling and Assessing Surface Water Potential Using Combined SWAT Model and Spatial Proximity Regionalization Technique for Ungauged Subwatershed of Jewuha Watershed, Awash Basin, Ethiopia

Table 4

General performance ratings of simulated discharge.

Performance rating	NSE	PBIAS	R^2
Very good	0.75 < NSE < 1	PBIAS < ±10%	0.75 < R^2 < 1
Good	0.65 < NSE < 0.75	±10% < PBIAS < ±15%	0.65 < R^2 < 0.75
Satisfactory	0.5 < NSE < 0.65	±15% < PBIAS < ±25%	0.5 < R^2 < 0.65
Unsatisfactory	NSE < 0.5	PBIAS > ±25%	R^2 < 0.5