TABLE 6.
Summary statistics for evaluation of monthly and annual calibration (2001–2013) and validation (1988–2000) of SWAT models with different precipitation sources.
| GHCN-D | DAYMET | NLDAS | GLDAS | PRISM | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Criteria | Monthly | Annual | Monthly | Annual | Monthly | Annual | Monthly | Annual | Monthly | Annual |
| Delaware River near Muscotah calibration (validation) | ||||||||||
| Coefficient of determination (R2) | 0.85 (0.92) | 0.94 (0.96) | 0.79 (0.90) | 0.86 (0.95) | 0.66 (0.85) | 0.83 (0.96) | 0.26 | 0.39 | 0.81 (0.89) | 0.84 (0.97) |
| Nash and Sutcliffe coefficient (NSE) | 0.84 (0.87) | 0.87 (0.88) | 0.78 (0.86) | 0.79 (0.88) | 0.66 (0.84) | 0.82 (0.93) | 0.20 | 0.38 | 0.81 (0.80) | 0.82 (0.82) |
| Kling-Gupta efficiency (KGE) | 0.78 (0.73) | 0.80 (0.70) | 0.75 (0.74) | 0.75 (0.71) | 0.73 (0.79) | 0.86 (0.88) | 0.45 | 0.44 | 0.80 (0.62) | 0.77 (0.64) |
| RMSE-observations standard deviation ratio (RSR) | 0.40 (0.36) | 0.34 (0.33) | 0.47 (0.38) | 0.44 (0.34) | 0.58 (0.40) | 0.40 (0.25) | 0.89 | 0.75 | 0.44 (0.43) | 0.41 (0.40) |
| P-factor | 0.91 | 0.92 | 0.81 | 0.78 | 0.89 | |||||
| R-factor | 1.89 | 1.95 | 1.96 | 1.53 | 1.96 | |||||
| Delaware River at Perry Lake calibration (validation) | ||||||||||
| R2 | 0.60 (0.58) | 0.91 (0.95) | 0.62 (0.60) | 0.87 (0.98) | 0.55 (0.38) | 0.88 (0.94) | 0.29 | 0.66 | 0.59 (0.61) | 0.90 (0.98) |
| NSE | 0.59 (0.54) | 0.85 (0.84) | 0.60 (0.56) | 0.83 (0.88) | 0.54 (0.36) | 0.88 (0.94) | 0.27 | 0.55 | 0.58 (0.53) | 0.86 (0.80) |
| KGE | 0.61 (0.51) | 0.71 (0.65) | 0.61 (0.51) | 0.75 (0.67) | 0.66 (0.55) | 0.87 (0.95) | 0.34 | 0.51 | 0.62 (0.44) | 0.74 (0.61) |
| RSR | 0.64 (0.67) | 0.37 (0.38) | 0.63 (0.66) | 0.40 (0.34) | 0.67 (0.8) | 0.34 (0.24) | 0.85 | 0.64 | 0.65 (0.68) | 0.37 (0.43) |
| P-factor | 0.88 | 0.90 | 0.79 | 0.82 | 0.87 | |||||
| R-factor | 1.86 | 1.94 | 1.97 | 1.53 | 1.99 | |||||
| Reservoir outflow calibration (validation) | ||||||||||
| R2 | 0.60 (0.56) | 0.89 (0.95) | 0.62 (0.58) | 0.87 (0.98) | 0.51 (0.36) | 0.87 (0.94) | 0.26 | 0.59 | 0.60 (0.60) | 0.88 (0.98) |
| NSE | 0.59 (0.52) | 0.82 (0.82) | 0.60 (0.53) | 0.81 (0.86) | 0.51 (0.35) | 0.86 (0.94) | 0.24 | 0.48 | 0.59 (0.51) | 0.85 (0.76) |
| KGE | 0.61 (0.48) | 0.69 (0.62) | 0.60 (0.48) | 0.74 (0.65) | 0.65 (0.52) | 0.84 (0.96) | 0.32 | 0.51 | 0.62 (0.41) | 0.76 (0.57) |
| RSR | 0.64 (0.69) | 0.40 (0.41) | 0.63 (0.68) | 0.42 (0.36) | 0.70 (0.81) | 0.35 (0.24) | 0.87 | 0.68 | 0.64 (0.70) | 0.36 (0.47) |
| P-factor | 0.85 | 0.87 | 0.76 | 0.77 | 0.87 | |||||
| R-factor | 1.86 | 1.95 | 2.00 | 1.51 | 1.98 | |||||
Notes: RMSE, root mean square error; RSR, RMSE-observations standard deviation ratio.
The model with GLDAS was not validated due to unavailable data.