低山丘陵区沟壑三维梯级治理开发模式研究

Study on 3D Cascade Mode of Management and Development of Gullies in Hilly Area

朝阳市水土流失面积 1195 1 4km2 ,占全市总面积的 60 67% ,沟壑侵蚀面积占水土流失面积的 2 2 40 %。利用沟壑纵剖面信息熵分析法 ,进行沟壑侵蚀地貌形态计量分析 ,按照沟壑三维特征值变化规律 ,将沟壑侵蚀概化为前期、中期、后期三个阶段。采取典型沟壑治理开发试验与大面积沟壑治理开发应用相结合的研究方法 ,建立沟壑三维梯级治理开发措施体系 ,取得了显著的生态、经济和社会效益。

The soil and water lost area in Chaoyang City is 11 951.4 km^2, making up 60.67% of the total of the city. The eroded gully area is 22.40% of the soil and water lost area. The paper estimates and analyzes the eroded geomorphology of gullies by using the method of information entropy analysis of vertical section of gully. It generalizes the gully erosion into three stages of earlier, mid and later ones according to the variation law of 3D characteristic value of gully. It establishes a system of 3D-cascade management and development measures for Gullies and achieves notable ecological, economic and social benefits through the combination of tests on management and development of typical gullies with the application of management and development of gullies in a large area.