典型冰碛补给型泥石流物源补给过程与机制研究——以泸定县干沟为例

干沟位于四川省泸定县境内,是一条典型的冰碛补给型泥石流沟,其物源补给具有复合过程的特点.在野外调查的基础上,以2005年干沟泥石流为例,对该次泥石流过程的物源补给特征及过程进行了调查和分析.结果表明,干沟泥石流的物源补给过程可分为“启动型物源”和“维持型物源”2种类型,对这2种类型的物源补给方式和过程进行了阐述,可为认识冰碛补给型泥石流的形成机理、物源补给过程及防灾减灾提供科学依据.

Source Supply Process and Mechanisms of Moraine-supplied Debris Flow -Take Gangou Valley in Luding County as an Example

Gangou valley in Luding County,Sichuan Province,is a typical valley of moraine-supplied debrisflow.Source supply is complex in debris flow processes.Based on a field survey,the characters of its sourcesupply process are analyzed by taking the debris flow occurred in 2005as an example.Finally,source supplyis classified as the two types of initiating source and maintaining source and each type of the source supply isinterpreted.The research is helpful for us to understand the mechanisms,source supply process and hazardmitigation of moraine-supplied debris flow.