中文摘要：

根据陕西省全省96个数据序列较完整的气象站点逐日降水资料,利用章文波提出的基于日降雨侵蚀力模型估算陕西省的降雨侵蚀力,并采用反距离权重空间插值方法,借助GIS工具绘制全省侵蚀性降雨量以及侵蚀性降雨量空间分布图,分析其全年和四季空间分布特征,并分析了年内变化特征。结果表明：（1）陕西省降雨侵蚀力的空间分布与侵蚀性降雨量的空间分布基本一致,均呈由南向西北递减态势,降雨侵蚀力与降雨量、侵蚀性降雨量均达极显著相关水平;（2）降雨侵蚀力年内集中度高,夏秋季降雨侵蚀力较大,冬春季降雨侵蚀力较小,陕北地区和关中发生水土流失的时期主要集中在7~9月份,而陕南地区5~10月份均可能发生较大的水土流失,侵蚀潜在危险性由北向南递增;（3）陕西省降雨侵蚀力的年际变化也较为明显,年际变率CV在33.1%~77.3%,不同地区的年降雨侵蚀力差异及波动程度都比较大,北部地区降雨侵蚀力的年际变化大于南部地区。

英文摘要：

Based on the daily rainfall data of 96 meteorological sites in Shaanxi Province whose sequence is com- pleted. The rainfall erosivity mode was used to calculate the rainfall erosivity of Shaanxi. （This mode was set up on the basis of daily rainfall and proposed by Zhang Wenbo.） The spatial distribution map was drawn of erosive rainfall （ ER ） and rainfall erosivity （ RE ） with the aid of GIS tools and the inverse distance weighted interpolation method. This paper analyzed both the spatial distribution characteristics of yearly and four-seasonal ER and RE, and annu- M variation characteristics. The results show as follows ： （ 1 ） There are significant differences of average annual ero- sion rainfall, the erosive rainfall of northern Shaanxi is least about 279.3 mm, the second is Guanzhong region about 366.4 mm, the largest erosion is in southern Shaanxi region about 589.1 mm. The change of average annual rainfall erosivity is between 781.6-7 690, the average annual rainfall erosivity of southern Shaanxi region is most about 3 499, the second is Guanzhong region about 1 881, the least rainfall erosivity is in northern shaanxi about 1 471.4. The spatial distribution of erosive rainfall is consistent with rainfall erosivity in Shaanxi Province, they all show de- creasing trend from the south to the north, rainfall erosivity is extremely significant with rainfall and erosive rainfall. （2） Rainfall erosivities have high concentration in a year;they are large in summer and autumn, small in winter and spring. In northern Shaanxi and Guanzhong region, the largest rainfall erosivitis are in August, respectively account for 35.7% and 27.6%, the rainfall erosivities from July to September respectively account for 78.6% and 72%. In southern Shaanxi, the largest rainfall erosivity is in July, accounts for 28.6%, the rainfall erosivities from July to Sep- tember and from May to October respectively account for 68.9% and 94.7%. Thus it can be found that the soil and water loss is mainly concentrated from Ju