Research progress on initiation mechanism of debris flow triggered by the destabilisation of gully loose deposits
Seismic-induced secondary disasters,such as collapses and landslides,generate loose deposits in gullies.Under the influence of intense rainfalls,these deposits can become destabilized and lead to the initiation of large-scale debris flow.The systematic study of this type of debris flow and the revelation of its initiation mechanism and destruction law can provide certain theoretical references for the debris flow prevention and control project in the southwest region in China,where such events are particularly prevalent.Therefore,based on the current state of domestic and international research,this study focuses on analyzing the factors affecting the stability of gully deposits,categorizes four destabilisation types,distills the initiation mechanism of two types of gully deposits,and summarizes three types of critical initiation models for debris flow triggered by the destabilisation of gully deposits from the perspective of hydrologic debris flows.Finally,due to the complexity of the initiation process of debris flow triggered by the destabilisation of gully deposits,three critical scientific issues involved in this type of debris flow are proposed based on the analysis of the shortcomings of the existing results.
gully depositsdestabilisationdebris flowinitiation mechanismcritical model
NETL
NSTL
万方数据
