基于野外调查的低频率泥石流识别——以泸定县潘沟泥石流为例

IDENTIFICATION OF DEBRIS FLOW WITH LOW RETURN PERIOD BASED ON FIELD SURVEY——TAKE PANGOU VALLEY IN LUDING COUNTY AS AN EXAMPLE

如何通过野外调查证据对隐蔽性强的低频泥石流进行早期识别对山区的防灾减灾具有实践意义。在对潘沟泥石流的物源特征、形成过程机制、堆积区特征及沟口树木特征调查访问的基础上,通过综合证据分析,认为潘沟泥石流的暴发频率较低,并在此基础上探讨了基于野外调查的低频泥石流的识别方法,预测了泥石流的发展趋势,可为类似孕灾背景的泥石流的防治提供依据。

How to identifying the debris flow with low return period by field survey is important for hazard prevention and mitigation.Based on the field survey of the source,forming process,alluvial fan,the trees live on alluvial fan and the interview to residents,this research shows that the Pangou is a low frequency debris flow gully.Moreover,the feasibility of the method for low frequency debris flow identification based on field survey is discussed in this paper,and the development trend of debris flow is predicted too,this research can provide evidence for debris flows who have the similar background.