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为研究岩溶区小流域土壤流失状况,以桂林寨底地下河流域为研究对象,以研究区土地利用为基础,采用多元数据集成的方法,将地理信息系统、遥感技术与修正的通用土壤流失方程相结合,估算岩溶区小流域土壤流失量。结果表明,流域平均土壤侵蚀模数为515.38 t/(km2.a),属于中度侵蚀,年均土壤流失总量为17 007.74 t,强烈及以上土壤流失面积仅占全流域总面积的10.05%,但土壤流失量却占流域土壤流失总量的79.75%。估算结果为岩溶区小流域水土流失研究和治理提供了重要的数据参考。
In order to study the situation of soil erosion in small watershed in karst area, taking Guilin subterranean river basin as research object and multi-dimensional data integration method based on land use in research area, this paper combines GIS, remote sensing technology and modified universal soil loss equation Combined to estimate the amount of soil erosion in small watershed karst area. The results show that the average soil erosion modulus of the basin is 515.38 t / (km2.a), which belongs to moderate erosion. The average annual soil loss is 17 007.74 t, and the area of soil erosion above and above is only 10.05% of the total area of the whole basin. , But the amount of soil loss accounts for 79.75% of the total amount of soil erosion in the basin. The estimation results provide important data reference for the research and management of soil and water loss in small watershed in karst area.