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| Country Model | Turton’s model a = 0.30 b = 0.40 | Rietveld’s model a = 0.18 b = 0.62 | ||||||
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| MBE (%) | RMSE (%) | r | MBE (%) | RMSE (%) | r | MBE (%) | RMSE (%) | r |
| Region 1 | a = −0.05 b = 0.94 |
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| −3.27 | 4.71 | 0.98 | 41.64 | 45.93 | 0.89 | 30.97 | 33.25 | 0.86 | |
| Region 2 | a = −0.02 b = 0.74 |
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| 0.22 | 2.77 | 0.95 | 0.21 | 2.80 | 0.36 | 32.30 | 33.06 | 0.99 | |
| Region 3 | a = 0.14 b = 1.13 |
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| 0.56 | 5.56 | 0.96 | −6.52 | 14.31 | 0.95 | −4.32 | 19.41 | 0.99 | |