黄土高原降水量空间插值方法研究

Research on Spatial Interpolation Methods of Annual Average Precipitation on Loess Plateau

为了研究黄土高原降水量的空间分布特征,利用ARCGIS软件分别采用多种空间内插方法对黄土高原108个气象站点1980-2009年30年间的平均年降水量进行空降插值。经过正交检验以及内插检验得到最优的插值方法为普通克里金法,最终对利用该方法获得的黄土高原降水量内插图进行分析,得出近30年来黄土高原区降水量分布呈现出明显的由东南向西北递减的态势。

In order to study the spatial distribution of Loess Plateau,the paper used many spatial interpolation methods to estimate the annual average Precipitation on Loess Plateau from 1980 to 2009 which based on the software of ARCGIS.Through cross and interpolation validation,found that the method of Ordinary Kriging is the best one.Finally,it analysized the spatial interpolation map which obtained by the method of Ordinary Kriging.It found that the precipitation distribution of Loess Plateau is decreased progressively from southeast to northwest in the recent 30 years.