摘要
以清远市瑶安小流域为例,从降雨条件、地形地貌条件、固体物质环境条件等方面分析该流域山洪灾害的成因。利用M-K法分析得知该流域各历时降雨均呈较为明显的上升趋势,未来该流域发生暴雨山洪灾害的可能性较大,降雨为山洪灾害形成提供了直接的外动力因素。基于GIS技术分析可知该流域陡坡主要集中于流域上游河道两岸,不利的坡度势能条件为山洪灾害形成提供了有利的地形地貌条件,该流域岩体风化和人类不合理活动为山洪灾害形成提供了重要的环境条件。
Taking Yaoan small watershed in Qingyuan for example,the paper analyzed the causes of mountain flood disaster from the basin rainfall condition,terrain condition,environmental condition of solid material. The result shows that the rainfall in each duration increases obviously by using M- K method. In the future,the possibility of happening heavy rain and mountain flood disaster is greater,and rainfall provide direct power factor for the formation of mountain flood disaster. Using GIS technology,the paper got the result that the valley slope is mainly concentrated in two sides of basin upstream river. The disadvantage gradient potential provide favorable conditions for the formation of mountain flood disaster.The basin rock weathering and unreasonable human activities provide the important environmental conditions for the formation of mountain flood disaster.
出处
《水资源与水工程学报》
2015年第3期136-141,共6页
Journal of Water Resources and Water Engineering
基金
广东省水利科技创新项目(2011-24)
关键词
山洪灾害
降雨条件
坡度势能
固体物质环境
瑶安小流域
mountainous flood disaster
rainfall condition
gradient potential
environment of solid material
Yaoan small watershed
