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Table 3

Performance rating of hydrological models for recommended statistics at monthly time step

Performance ratingMoriasi et al. (2007) Parajuli (2010) 
RSRNSEPBIAS %R2 value
Excellent – – – >0.90 
Very good 0.00 ≤ RSR ≤ 0.5 0.75 ≤ NSE ≤ 1.00 |PBIAS| < 10 0.75–0.89 
Good 0.5 < RSR ≤ 0.6 0.65 < NSE ≤ 0.75 10 < |PBIAS| ≤ 15 0.50–0.74 
Satisfactory 0.6 < RSR ≤ 0.7 0.5 < NSE ≤ 0.65 15 < |PBIAS| ≤ 25 0.25–0.49 (Fair) 
Unsatisfactory RSR > 0.7 NSE < 0.5 |PBIAS| > 25 0–0.24 (Poor) 
Performance ratingMoriasi et al. (2007) Parajuli (2010) 
RSRNSEPBIAS %R2 value
Excellent – – – >0.90 
Very good 0.00 ≤ RSR ≤ 0.5 0.75 ≤ NSE ≤ 1.00 |PBIAS| < 10 0.75–0.89 
Good 0.5 < RSR ≤ 0.6 0.65 < NSE ≤ 0.75 10 < |PBIAS| ≤ 15 0.50–0.74 
Satisfactory 0.6 < RSR ≤ 0.7 0.5 < NSE ≤ 0.65 15 < |PBIAS| ≤ 25 0.25–0.49 (Fair) 
Unsatisfactory RSR > 0.7 NSE < 0.5 |PBIAS| > 25 0–0.24 (Poor) 
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