Evaluation of landslide hazard susceptibility in Semi-mountainous areas based on CF and Logistic coupling model supported by GIS
This paper is the research on the geological disasters.[Objective]Located in the semi-mountainous region of the Yungui Plateau,Huize County is frequently affected by geological disasters,particularly landslides.This study focused on landslide hazards,with a coupled model being employed for vulnerability assessments,aiming to develop an evaluation model tailored to the unique geographical and environmental characteristics of the semi-mountainous area of the Yungui Plateau.[Methods]Twelve evaluation factors,including topography,slope,and aspect,were carefully selected.The probability of landslide occurrence was calculated using the Coefficient of Determination(CF)and Logistic coupling model.The results were graded using the GIS-based Natural Breaks method.The model underwent rigorous validation through rationality and sensitivity tests.[Results](1)Elevation,distance to faults,distance to roads,and slope were identified as significant influencers on landslide susceptibility in Huize County.(2)The areas categorized as stable,low,moderate,and high susceptibility cover 46.25 km2(0.61%),3 095.41 km2(52.77%),1 296.64 km2(21.94%),and 1 446.53 km2(21.94%),respectively.(3)The Coefficient of Determination(CF)and Logistic coupling model demonstrated high rationality,with an AUC value of 0.927.[Conclusions](1)Moderate to high susceptibility landslide areas are concentrated in the southwest and northeast regions of Huize County,while low susceptibility and stable areas are prevalent in the northwest,central,and southern regions.(2)The application of the CF-Logistic coupling model for landslide vulnerability assessment exhibits superior rationality and accuracy.
GIScertainty factorlogistic modelsusceptibility evaluationlandslideHuize Country
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