摘要
荷叶正沟为九寨沟的一级支流,发育有3条支沟,其中#3支沟曾于1948年发生过泥石流地质灾害,对沟口60户310多人的生命安全构成了威胁,因此查明其形成条件、泥石流动静力学参数等显得特别重要。通过现场沟谷调查、试验,分析了泥石流形成的地形条件、物源条件和降雨条件,计算得出了其动静力学参数,并对其进行了危险性评价,得出荷叶正沟为一条百年一遇的低频粘性泥石流沟,是一条中等危险性泥石流沟,可为泥石流的防治和治理提供参考。
Heyezheng Gully is the main tributary of Jiuzhaigou, which has three branch gullies, and No. 3 branch gully had broken out a debris flow in 1948. It is particularly important to find out that formation mechanism and dynamic and static mechanical parameters of debris flow because it threats to the life safety of 60 households more than 310 people. Through field investigation and experiment, the causes of debris flow of source conditions, topography and rainfall were analyzed. And then the dynamic and static mechanical parameters of debris flow were calculated and its hazard was evaluated. It concluded that the Heyezheng Gully is a once in-a-lifetime low-frequency viscous debris flow gully and its hazard assessment belongs to medium level. The result can provide reference for prevention of debris flow disasters.
出处
《水电能源科学》
北大核心
2015年第12期139-142,196,共5页
Water Resources and Power
基金
中国地质调查局项目(1212011220154)
关键词
荷叶正沟
泥石流
形成条件
泥石流流速
危险性评价
Heyezheng Gully
debris flow
formation mechanism
flow velocity
hazard assessment
