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土地利用结构特征可反映某个区域的土壤侵蚀状况,也是水土保持研究的内容之一。通过运用遥感影像得出榆阳区土壤侵蚀分级图,并根据公式得出土壤侵蚀严重指数。运用层次分析法计算出水田、平缓旱地、坡耕地、林地、草地、水体、建设用地和未利用地在土壤侵蚀强度评价中所占权重。通过对2005-2008年榆阳区土地利用结构特征值的分析得出榆阳区土壤侵蚀有所好转,为今后土地利用结构调整和土地开发整理提供参考。
The characteristics of land use structure can reflect the status of soil erosion in a certain area and also one of the contents of soil and water conservation research. By using the remote sensing images, the soil erosion gradation map of Yuyang District was obtained and the serious index of soil erosion was obtained according to the formula. The analytic hierarchy process is used to calculate the weight of paddy field, gently dry land, sloping farmland, forest land, grassland, water body, construction land and unused land in the evaluation of soil erosion intensity. Based on the analysis of the land use structure eigenvalues of Yuyang District from 2005 to 2008, it is found that the soil erosion in Yuyang District has been improved, which will provide reference for future land use structure adjustment and land development and consolidation.