摘要
运用地统计学,结合GIS技术研究了福建省降雨侵蚀力空间分布特征。采用变异函数定量描述空间分布结构特征和析取克里格法进行最优插值,结果表明:福建省降雨侵蚀力变异函数采用指数模型模拟较好,有显著的空间结构性特点,且具有中等空间相关性;分形维数表明降雨侵蚀力表现出一定的方向性特点,在NW-SE向相关性较好;从Kriging插值结果可知,析取克里格插值优于普通与简单克里格插值,降雨侵蚀力较大值分布于研究区域的西北和东北部地区。
Geostatistical methods were used in combination of GIS techlonogy to analyze the spatial distribution characteristics of rainfall erosivity in Fujian province. The spatial distribution features were quantitatively described by variogram. Based on the variograms, Disjunctive Kriging interpolation was performed. The results indicated that rainfall erosivity in Fujian province was fitted to exponenyial model and had good spatial structures and was moderately spatially dependent. The fractal dimention indicated that the rainfall erosivity showed some directional features and had reletively good correlations in the directions of NW - SE. With the Kriging analysis, Disjunctive Kriging interpolation method performed beter than Ordinary Kriging and Simple Kriging;the bigger value of rainfall erosivity mainly distributed in the northwest and the northeast.
出处
《山地学报》
CSCD
北大核心
2009年第5期538-544,共7页
Mountain Research
基金
福建省教育厅资助项目(JA05227)~~
