Research Article
Analysis of the Changes in the Water Yield Coefficient over the Past 50 Years in the Huang-Huai-Hai River Basin, China
Table 3
Comparison of the six interpolation methods.
| City | Number | Method | Mean | Value | Error | City | Number | Method | Mean | Value | Error | City | Number | Method | Mean | Value | Error |
| 1- Huangnan | (1) | IDW | 0.360 | 0.353 | 0.020 | 5- Ping liang | | IDW | 0.141 | 0.124 | 0.139 | 9- Binzhou | | IDW | 0.178 | 0.184 | −0.034 | | Kriging | 0.309 | 0.353 | −0.123 | | Kriging | 0.204 | 0.124 | 0.651 | | Kriging | 0.155 | 0.184 | −0.161 | | Natural | 0.362 | 0.353 | 0.027 | (3) | Natural | 0.136 | 0.124 | 0.098 | | Natural | 0.171 | 0.184 | −0.074 | | Spline | 0.345 | 0.353 | −0.022 | | Spline | 0.074 | 0.124 | −0.400 | (4) | Spline | 0.184 | 0.184 | −0.003 | | Topo | 0.365 | 0.353 | 0.034 | | Topo | 0.117 | 0.124 | −0.053 | | Topo | 0.164 | 0.184 | −0.112 | | Trend | 0.322 | 0.353 | −0.086 | | Trend | 0.296 | 0.124 | 1.394 | | Trend | 0.252 | 0.184 | 0.369 |
| 2- Datong | | IDW | 0.091 | 0.099 | −0.085 | 6- Yantai | | IDW | 0.217 | 0.204 | 0.068 | 10- Xining | (1) | IDW | 0.275 | 0.275 | 0.002 | | Kriging | 0.084 | 0.099 | −0.156 | | Kriging | 0.218 | 0.204 | 0.072 | | Kriging | 0.269 | 0.275 | −0.019 | | Natural | 0.089 | 0.099 | −0.097 | | Natural | 0.226 | 0.204 | 0.109 | | Natural | 0.270 | 0.275 | −0.019 | (4) | Spline | 0.096 | 0.099 | −0.026 | | Spline | 0.231 | 0.204 | 0.137 | | Spline | 0.271 | 0.275 | −0.013 | | Topo | 0.078 | 0.099 | −0.208 | (5) | Topo | 0.208 | 0.204 | 0.023 | | Topo | 0.270 | 0.275 | −0.018 | | Trend | 0.214 | 0.099 | 1.160 | | Trend | 0.252 | 0.204 | 0.240 | | Trend | 0.289 | 0.275 | 0.052 |
| 3- Anyang | (1) | IDW | 0.151 | 0.188 | −0.201 | 7- Ordos | | IDW | 0.060 | 0.055 | 0.094 | 11- Yan’an | (1) | IDW | 0.061 | 0.056 | 0.093 | | Kriging | 0.127 | 0.188 | −0.324 | | Kriging | 0.064 | 0.055 | 0.165 | | Kriging | 0.110 | 0.056 | 0.978 | | Natural | 0.132 | 0.188 | −0.299 | | Natural | 0.061 | 0.055 | 0.118 | | Natural | 0.064 | 0.056 | 0.151 | | Spline | 0.150 | 0.188 | −0.201 | (4) | Spline | 0.050 | 0.055 | −0.080 | | Spline | 0.050 | 0.056 | −0.102 | | Topo | 0.134 | 0.188 | −0.287 | | Topo | 0.040 | 0.055 | −0.273 | | Topo | 0.042 | 0.056 | −0.251 | | Trend | 0.287 | 0.188 | 0.526 | | Trend | 0.231 | 0.055 | 3.219 | | Trend | 0.285 | 0.056 | 4.118 |
| 4- Bengbu | (1) | IDW | 0.144 | 0.137 | 0.054 | 8- Qinhuangdao | (1) | IDW | 0.139 | 0.137 | 0.018 | 12- Xinyang | | IDW | 0.178 | 0.203 | −0.127 | | Kriging | 0.145 | 0.137 | 0.057 | | Kriging | 0.133 | 0.137 | −0.027 | | Kriging | 0.176 | 0.203 | −0.134 | | Natural | 0.123 | 0.137 | −0.098 | | Natural | 0.143 | 0.137 | 0.042 | | Natural | 0.184 | 0.203 | −0.096 | | Spline | 0.123 | 0.137 | −0.101 | | Spline | 0.141 | 0.137 | 0.033 | (4) | Spline | 0.192 | 0.203 | −0.057 | | Topo | 0.106 | 0.137 | −0.225 | | Topo | 0.143 | 0.137 | 0.043 | | Topo | 0.157 | 0.203 | −0.230 | | Trend | 0.334 | 0.137 | 1.442 | | Trend | 0.203 | 0.137 | 0.479 | | Trend | 0.356 | 0.203 | 0.752 |
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