摘要
通过湖南省江永县大畔村泥石流灾害的调查,本文认为该泥石流属于暴雨类、沟谷型、低容重、低黏度、低频率、小型、稀性泥石流,其形成主要受控于沟道纵坡陡峭、洪峰流量迅速形成、丰富的松散堆积物质、沟道大直小弯等因素。该泥石流沟道内物源较丰富,能参与泥石流活动的动态物源量较大,在连续超长降雨的情况下,暴发泥石流的可能性大。
Through the investigation of debris flow in Dapan Village,Jiangyong County,Hunan Province,this paper believes that the debris flow belongs to storm type,valley type,low bulk density,low viscosity,low frequency,small and diluted debris flow,whose formation is mainly controlled by the steep longitudinal slope of the channel,the rapid formation of flood peak flow,the abundant loose accumulation material,and the mainly straight but with small curved channel.The debris flow channel is rich in material sources,and the amount of dynamic material sources that can participate in debris flow activities is large,and the possibility of debris flow outbreak is high under conditions of continuous extraordinarily longtime rainfall.
作者
高鸿斌
GAO Hongbin(Mineral Resources Survey Institute of Hunan Province,Changsha 423000,Hunan,China)
出处
《资源信息与工程》
2025年第3期38-41,共4页
Resource Information and Engineering
关键词
泥石流
冲淤特征
灾害特征
引发机制
debris flow
characteristics of erosion and deposition
disaster characteristics
triggering mechanism
