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崩岗是山岗的坡面从山脚到山顶发生严重崩塌而被侵蚀的一种土壤侵蚀现象,一般多发生于花岗岩风化严重的低山丘陵区,有些砾岩风化区和第四纪残坡积层区也有发生,在我国南部和西南部的广东、广西、湖南、江西、福建、云南、贵州等省都有分布,尤以广东省十分严重。 崩岗在水土流失面积中所占比例虽小,但所造成的泥沙流失量却特别大,远远大于面状和沟状侵蚀,带来的危害也极为严重,治理崩岗是水土保持工作中的重要任务之一。根据各地经验,治理崩岗应采取工程措施和植物措施相结合,本文仅就崩口谷坊工程中的几个问题进行探讨并提出建议。
Collapse hill is a mountain slope from the foot to the summit of a serious collapse and erosion of a soil erosion, usually occurred in the granite weathered hilly area, some of the weathered areas and the Quaternary residual sediment Layers have also occurred in Guangdong Province, Guangxi Province, Hunan Province, Jiangxi Province, Fujian Province, Yunnan Province and Guizhou Province in the south and southwest of China, especially in Guangdong Province. The proportion of collapse hillock in soil erosion area is small, but the sediment loss caused is particularly large, far greater than the surface and trench erosion, the harm caused is extremely serious, management collapse is the work of soil and water conservation In one of the important tasks. According to local experience, the management of collapse should take engineering measures and plant measures combined, this article only on the collapse of the valley project to discuss several issues and make recommendations.