Evaluation of geological hazard susceptibility in Nangsong River basin based on certainty factor and information quantity models
The complex geological environment conditions and a large number of human engineering activities in Yunnan lead to its frequent geological hazards.Therefore,the identification and prevention of geological hazards in this area are very important.This paper takes the Nangsong River basin in Lianghe County,Yunnan as the research area,and selects five evaluation factors which are elevation,slope,vegetation coverage,water system,and engineering petrofabric as evaluation indicators.The 41 geological hazard areas have been classified and the susceptibility of geological hazards in the study area has been evaluated based on CF and information quantity model,and the results of the evaluation model have been tested by using the ROC curve.The results show that the AUC test value obtained by the information quantity model is 0.804,and the AUC test value obtained by the certainty factor model is 0.781,which indicates that the information model is more suitable for the evaluation of geological hazard susceptibility in the study area.The research results can provide certain data support for disaster prevention and mitigation in Lianghe County,Yunnan.
geological hazardssusceptibility assessmentinformation quantity modelcertainty factor modelNangsong River
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NSTL
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