通过对ＴＭ图像的线性纹理提取和密度统计，首先获得了黄土丘陵区沟谷密度图，然后由沟谷密度反演区域土壤侵蚀强度。这种方法避开了影响土壤侵蚀量的诸多复杂因子。可直接从水土流失的外在表现———沟谷密度来反推土壤侵蚀强度。研究结果证明，这种方法对快速调查大范围黄土丘陵区的土壤侵蚀强度是十分有效的 Through the linear texture extraction and density statistics of TM images, the density map of the valley in the loess hilly region was first obtained, and then the soil erosion intensity in the region was retrieved from the density of the valley. This method avoids many of the complications that affect soil erosion. Directly from the external performance of soil erosion --- valley density to reverse soil erosion intensity. The results show that this method is very effective for the rapid investigation of soil erosion intensity in a wide range of loess hilly areas