复杂地形区土壤侵蚀及其影响因子提取

相对与地形平坦地区,复杂地形区土壤侵蚀的提取存在较大的难度。RUSLE是目前应用最广泛的土壤侵蚀经验模型,但它只提供了一般条件下土壤侵蚀的提取方法。为了将RUSLE有效的应用在复杂地形区,需要对模型中相关侵蚀因子提取方法进行适当的调整。因此重点对受复杂地形影响严重的地形因子和作物覆盖与管理因子的提取方法进行研究,提出了更准确的提取方法。利用该方法对三峡库区的姊归县进行实验,结果表明,该方法可以有效提取土壤侵蚀信息。

S0il Erosion and Extraction of Its Influence Factors in Complex Topographical Region

The extraction of soil erosion in complex topographical region is much more difficult than that in flat region.RUSLE is the most widely-used model for soil erosion,but it only supplies the extraction algorithms at normal condition.Therefore,it is necessary to make a proper modification of extraction method on corresponding erosion factors to apply RUSLE to the complex topographical region effectively.The extraction method of topographical factor and cover-management factor,which are affected seriously by complex topography are focused,and a more precise extraction method is proposed,which has been applied to the experiment in Zigui county of Three Gorges Reservoir area.The test results indicate the algorithm can extract the soil erosion information effectively.