Deformation mechanisms and early discrimination method with InSAR technology of scattered block rock in rocky desertification areas of Southwest Guizhou Province,China
In rocky desertification areas of Southwest Guizhou Province,there is a general phenomenon that the surface layer develops regional scattered block rock deformation,but the whole mountain is stable,which leads to the fact that the identification of hidden danger points of geological disasters by InSAR is often misjudged as landslide,leading to a very low accuracy of early discrimination of geo-hazards in the Southwest Guizhou Province.Taking two typical rocky desertification areas in Xingyi City of Qianxinan Prefecture,Guizhou Province as ex-amples,this paper first briefly summarizes the regional tectonic geological background and engineering geologi-cal conditions of rocky desertification areas,then introduces the identification method,distribution status and field verification method of scattered block rock deformation in rocky desertification areas,then reveals the mechanism of deformation of scattered block rock in rocky desertification areas,and analyzes the reasons why deformation of scattered block rock is easily misjudged as a hidden danger of landslide in InSAR identification.Finally,according to the law of deformation of scattered block rock in rocky desertification areas,this paper puts forward a method of using InSAR technology,especially PS-InSAR technology to early identify deforma-tion of scattered block rock in rocky desertification areas.The results show that this method improves the effi-ciency and accuracy of InSAR in identifying hidden danger points of geological disasters in rocky desertification areas.The research results have important reference value for the early identification of geological disasters in other karst areas in China.
rocky desertification areadeformation of scattered block rocklandslide geohazardInSARmis-judgeearly discrimination
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