基于GIS的喀斯特地区土壤侵蚀度分析——以贵阳市花溪水库流域花溪区范围为例

为深入研究中国西南喀斯特山区土壤侵蚀空间分布特征，该文在GIS技术支撑下，以贵阳市花溪水库流域花溪区范围为研究区，将石漠化因子引入修正的通用土壤流失方程（RUSLE），进行土壤侵蚀量的计算和侵蚀等级划分，并对研究区土壤侵蚀防治措施进行了探讨。结果表明：花溪水库流域花溪区范围属于中度侵蚀，由于人类活动的干扰，侵蚀强度呈不均匀分布，人类活动频繁地方侵蚀比较严重。其中，以旱地（坡耕地）土壤侵蚀模数最大，灌草地、其他林地、疏林地、有林地次之，水田最小。

Estimation of Soil Erosion in Karstic Region Based on GIS --A Case Study of Huaxi Reservoir Watershed in Huaxi Borough,Guiyang City

Soil erosion is one of the key factors for land degradation and productivity reduction in karstie mountainous areas of southwest China. The spatial distribution characteristics and control measures of soil erosion in Huaxi reservoir Watershed in Huaxi borough, Guiyang City were discussed by pulling rocky desertification factor into the revised universal soil loss equation （RUSLE） and GIS. Results show that the tested area belongs to the moderate erosion due to the interference of human activities, and the erosion intensity is not evenly distributed. Frequent human activities aggravated soil erosion. The erosion modulus of dryland ranks the first, followed by that of grassland, other woodland, open forest land and woodland, and the erosion modulus of paddy field was the minimum.