基于RS和GIS的乌东德水电站坝址区土壤侵蚀预测研究

 选取乌东德水电站坝区一典型区为试验示范区，以通用土壤流失方程（USLE）为评价模型，运用GIS和RS对各指标因子赋值，对试验区的土壤侵蚀量进行估算与分析。结果表明，试验区平均土壤侵蚀模数为6 088.58t/(km2·a)，属于强度侵蚀。试验区中度以下的侵蚀面积占总面积的57.91%，土壤侵蚀量的贡献率仅为8.85%；而91.15%的侵蚀泥沙来自于面积42.09%的强度侵蚀以上的区域，其中，占11.53%的剧烈侵蚀区域贡献了43.83%的侵蚀泥沙。

Soil Erosion Prediction in Dam Region of Wudongde Hydroelectric Power Station based on GIS and RS

One representative section in the dam region of Wudongde Hydroelectric Power Station is selected as an experiment and demonstration area. And taking the universal soil erosion equation(USLE) as an appraising model, GIS and RS are used for evaluating all index factors to value assignment, then the volume of soil erosion in the experiment region are estimated and analyzed. The results show that the average soil erosion modulus in experiment region is 6088.58t/(km2·a), which is in the range of intensive erosion. Erosion areas below middle account for 57.91% of the experiment area, but the contributing rate of soil erosion amount is only 8.85%. About 91.15% of erosion sediment will come from that area which is only 42.09%of erosion intensity region, of which 11.53%serious erosion area contributes to 43.83% erosion sediment.