广东五华乌陂河流域崩岗发育规律及其治理--以迎龙山为例

The Development Law and Countermeasures of Collapse Gully Erosion about Wubei River Watershed in Wuhua County,Guangdong Province——A Case Study of Yinglongshan Mt.

崩岗侵蚀是华南花岗岩风化壳深厚地区特有的水土流失形式。这种水土流失不仅侵蚀规模大,发展速度快,危害十分严重,而且治理非常困难,被称为当今"生态环境溃疡"。在总结前人研究成果的基础上,通过多次野外实地考察,在对五华县乌陂河流域迎龙山崩岗的发育规律进行分析后认为,迎龙山的崩岗多数为条形,鲜有瓢形和爪形,没有弧形和箕形等,但各坡向崩岗发育不均一,阳坡崩岗成对或成群发育且有一个超大型的崩岗群,而阴坡崩岗均单独发展。形成崩岗的主要机理包括径流冲刷、水蚀和重力侵蚀的相互效应以及岩石自身的风化膨胀等,最后提出了治理崩岗的工程措施和生物措施。

Collapse Gully Erosion is specific forms of soil erosion in South China where with deep weathering crust. This large-scale soil erosion is not only the development of speed,against a very serious,but also very difficult to control,is called ＂the ecological environment ulcer＂. based on the predecessors＇ achievements,many field investigations,analyzed of the development of Collapse Gully Erosion of Yinglongshan Mt.,Wubei River Basin. This paper Pointed out that most of the Collapse Gully Erosion there is Strip,few of ladle-shaped and claw-shaped,no arc-shaped,and winnow basket-shaped,the development of Collapse Gully Erosion in each aspect are unequal,more and larger in tailo but less and solus in ubac. The main mechanism for Collapse Gully Erosion is the combined effects that consist of runoff erosion,ablation,gravity erosion,and weathering of the rock itself. The article concludes with some arrangements range over engineering measures and biological measures of Collapse Gully Erosion governance.