Risk assessment of karst ground collapse based on AHP model
This article takes the karst ground collapse in Zhuzhuang Village,Zhuzhuang Town,Tongbai County as an ex-ample,and collects geological environment data,hydro-geological data,and engineering geological data from the research ar-ea.Six main control factors are selected,including bedrock lithology,karst development degree,cover layer thickness,per-meability,water level fluctuation amplitude,and groundwater level burial depth,By overlaying the weights determined by An-alytic Hierarchy Process(AHP)with the thematic maps of various main control factors processed by GIS,the risk zoning eval-uation of karst ground collapse in Zhuzhuang,Tongbai County is conducted.Based on the comparison with the collapse that has occurred,the accuracy of the AHP-GIS coupling evaluation results in the risk assessment of karst ground collapse in Zhuzhuang has been verified.Almost all the karst collapse points that have occurred are located in high-risk areas.The eval-uation results can provide a reference basis for the prevention and control of karst ground collapse in Zhuzhuang,and the evalu-ation method has reference significance for the risk assessment of other karst ground collapses.
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