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Table 2 Selected spatial interpolation methods for precipitation indices based on the mean square error (MSE) evaluation results (IDW inverse distance weighting)

From: Hydrological impacts of precipitation extremes in the Huaihe River Basin, China

Index MSE CDD CWD PRCPprb PRCPtot R95p RX1 day RX5 day SDII
Value Method Kriging Kriging Kriging Kriging Kriging Kriging Kriging Kriging
MSE 1.58 0.21 0.0067 41.98 15.66 5.67 7.70 0.37
Method IDW IDW IDW IDW IDW IDW IDW IDW
MSE 2.06 0.25 0.0093 39.88 16.43 4.76 7.87 0.45
Method Spline Spline Spline Spline Spline Spline Spline Spline
MSE 2.52 0.27 0.0118 51.80 14.66 4.66 5.78 0.33
Selected methods Kriging Kriging Kriging IDW Spline Spline Spline Spline
Anomaly Method Kriging Kriging Kriging Kriging Kriging Kriging Kriging Kriging
MSE 2.53 0.40 0.0041 47.80 33.84 11.87 23.80 0.52
Method IDW IDW IDW IDW IDW IDW IDW IDW
MSE 1.87 0.37 0.0046 46.79 38.92 9.57 25.47 0.50
Method Spline Spline Spline Spline Spline Spline Spline Spline
MSE 1.83 0.27 0.0077 38.79 33.12 9.03 23.17 0.48
Selected methods Spline Spline Kriging Spline Spline Spline Spline Spline