湖南崩岗侵蚀成因及综合防治体系探讨

湖南分布有不同类型的崩岗25 443处,崩岗区面积3 796.59 hm2,崩岗侵蚀模数达2.0万~2.5万t/(km2.a)。在介绍湖南崩岗类型、崩岗的规模分类与发育现状及崩岗危害的基础上,从岩性与地质构造、地形地貌与土壤、降雨、植被等方面分析了崩岗形成的原因,并根据崩岗的不同分区提出了综合防治崩岗的思路和应采取的措施体系。

Analysis on Genesis Erosion of Dilapidated Granite and Approach to Integrated System of Prevention and Control in Hunan

There are 25 443 places of dilapidated granite in various types in Hunan with the area of 3 796.59 hm~2 and erosion modulus 20 000 ~25 000 t/(km~2·a).Based on the introduction of classification,scope and development status and harmfulness of dilapidated granite in Hunan,the paper analyzes the cause of formation of dilapidated granite from the aspects of lithology and geological structure,topography and soil,precipitation and vegetation and puts forward the train of thought for prevention and control and measure system that should be adopted according to different zoning of dilapidated granite.