Research Article
Evaluation of Seven Gap-Filling Techniques for Daily Station-Based Rainfall Datasets in South Ethiopia
Table 4
The performance evaluation result of gap-filling techniques in Boditi-School station before and after empirical quantile mapping plus.
| Performance evaluation criteria | Gap-filling techniques | SAM | NRM | CCW | IDW | MLR | EQM |
| Before empirical quantile mapping plus | MAE (mm) | 3.82 | 3.84 | 3.83 | 3.89 | 3.83 | 4.11 | RMSE (mm) | 7.22 | 7.23 | 7.21 | 7.33 | 7.01 | 8.65 | SS (unitless) | 0.15 | 0.15 | 0.15 | 0.13 | 0.20 | −0.22 | R (unitless) | 0.44 | 0.45 | 0.45 | 0.43 | 0.45 | 0.31 |
| After empirical quantile mapping plus (EQM+) | MAE (mm) | 3.39 | 3.39 | 3.38 | 3.44 | 3.24 | 3.84 | RMSE (mm) | 7.14 | 7.13 | 7.13 | 7.23 | 7.17 | 8.48 | SS (unitless) | 0.17 | 0.17 | 0.17 | 0.15 | 0.16 | −0.17 | R (unitless) | 0.44 | 0.44 | 0.44 | 0.43 | 0.45 | 0.30 |
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MAE, RMSE, SS, and R are mean absolute error, root mean square error, skill score, and Person’s correlation coefficients, respectively.
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