| 摘要: |
| 分析了田间同深度土壤含水量的半方差和不同深度土壤含水量的交互半方差特征，探讨了土壤含水量的Kriging和Cokriging估值方法。研究表明，同深度土壤含水量与不同深度的土壤含水量之间均具有显着的空间相关性，用Kriging方法进行土壤含水量的估值精度较传统方法高。加入浅层土壤含水量用Cokriging方法来估测深层土壤含水量，可进一步提高估值精度。 |
| 关键词: 土壤含水量 空间变异性 Kriging估值 Cokriging估值 |
| DOI：11894/1005-829x.2001.21(3).59 |
| 分类号: |
| 基金项目:国家自然科学基金项目(49871040);国家重大科技产业示范工程项目(99-021-01-02) |
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| Estimating of Soil Water Content Using Kriging and Cokriging Methods |
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MA Xiao yi, LI Xin ping, ZHAO Yan feng
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Northwest Science and Technology University of Agriculture and Forestry, Yangling 712100, Shaanxi Province, PRC
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| Abstract: |
| The semivariogram and cross-semivariogram of soil water content of 20 cm and 55 cm were analysed. The optimal interpolation of soil water content by Kriging and Cokriging was calculated. It isshown that the interpolation precision of Kriging method is higher than that of Jackkniffing and linear methods,the precision of Cokriging method is higher than that of above methods. The upper layer soil water content value can be used to improve the interpolation precision of deeper layer soil water content. |
| Key words: soil water content spatial variation Kriging method Cokriging method |
