| 摘要: |
| 在地统计学和地理信息系统支持下，采用多种插值方法对黄土高原降水量进行了空间插值研究，并探讨了气象站点密度与布局对插值结果的影响。结果表明，地统计学方法优于传统的反距离加权插值、多项式插值和径向基函数插值方法；考虑高程影响的普通协克里金方法优于一般的克里金方法和简单协克里金方法。通过空间插值得到了黄土高原降水量分布图，由该降水量分布图可知，黄土高原降水量总体呈现西北低、东南高的态势，界限很明显；年均降水量在100-800 mm，主要集中在200～600 mm内，以半湿润-半干旱气候为主。 |
| 关键词: 黄土高原 降水量 插值 克里金方法 协克里金方法 |
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| 基金项目:国家科技部重点科技项目（20002BA901A43）；国家重点基础研究发展规划项目（G2000018606）；国家“十五”科技攻关项目(2004BA508B14) |
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| Research on spatial interpolation methods of pricipitation on loess plateau |
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| Abstract: |
| Based on geostatistical method and GIS,the paper use several interpolation methods to estimate the pricipitation on loess plateau.Of several interpolation methods ,the Kriging method is better than the reverse distance weighting method,polynomial interpolation method and radial basis funcions method,Ordinary CoKriging,in consideration of great influences of the elevation information,is better than CoKriging method and Kriging is best.At the same time,the paper also analysed the interpolation inferance of the distribution of stations.The trend of pricipitation on loess plateau shows a clear ambit with more pricipitation in sontheast,and southeast the annual pricipitation is 100-800 mm,centeralized at 200-600 mm. |
| Key words: Loess Plateau precipitation spatial interpolation Kriging Co-Kriging |
