中文摘要：

以数字高程模型（DEM）、降雨量、土壤、遥感影像等为基础数据，运用GIS与遥感技术，结合RUSLE模型研究辽宁省朝阳市2001～2010年的土壤侵蚀时空分异特征。研究结果如下：①2001-2010年土壤侵蚀模数总体呈下降趋势，其中2009年的平均土壤侵蚀模数为254．02t·hm-2·a-1，为10a间最低值；②微度土壤侵蚀面积总体呈上升趋势，但以上2个指标在2010年均出现了不同程度的反弹；⑧朝阳县是土壤侵蚀最严重的地区，土壤侵蚀模数的平均值最高，为747．33t·hm-2·a-1，中度以上土壤侵蚀面积分别为29．2％、32．67％、34．57％、31．41％。

英文摘要：

Taking Chaoyang City, Liaoning Province as the study area, with RS and GIS, based on RUSLE mod- el, utilizing a series of data such as digital elevation model （DEM）, rainfall, soil and RS images, the research of characteristics of spatial-temporal differentiation of soil erosion of Chaoyang City from 2001 to 2010 is con- ducted. Through the analysis of the time change of soil erosion modulus, time change of soil erosion intensity and spatial distribution of soil erosion intensity, the results of this research are summed up as follows： 1） The value of soil erosion modulus of this study area was generally in decline in 10 years. From 2004 to 2009 years, the overall situation was relatively good. Among them the average lowest value （254.02 t.km-2-a-＇） was in 2009 due to the drought, however the average highest value （576.74 t.km-2. a-1） was in 2010 on account of torrential rain. And this is a special phenomenon, in contrast to the variety trend. 2） The area which is slightly eroded is rising. However, these indexes bounced back in 2010. From the spatial distribution of soil erosion, soil erosion modulus is on the high side place in the mountains. 3） Chaoyang County in north-west of the study area, is the most heavily eroded region. The average value of soil erosion modulus in that County （747.33 t.km-2.a-l） ranks the first. Besides, according to the standard, the rates of area which is intensively eroded or more serious are re- spectively 29.2%, 32.67%, 34.57% and 31.41%. In Lingyuan City, the rates of area which is intensively eroded or more serious are respectively 21.22%, 23.32%, 24.98%, and 29.04%. Similarly, soil erosion intensity in 2010 showed different degree of rebound in the study area. These above findings show that although 10-year period corresponding measures on soil and water conservation were taken in Chaoyang City, but there are still some areas （especially in Chaoyang County） for the prevention of soil erosion have not given adequate atten- tion, especially in natural