Geological Hazard Susceptibility Assessment Based on Normalized Information Model Supported By GIS
Taking Yuanling county as the study area,the development and distribution characteristics of geological hazards are quantitatively analyzed.Based on the controlling factors and triggering factors,nine factors such as elevation,aspect,slope,profile curvature,rock group,distance from faults,distance from roads,distance from rivers,and average annual rainfall are selected as evaluation indexes.Min-Max normalization algorithm based on linear function transformation is used to normalize the data obtained from the information quantity model.Finally,the model accuracy is examined by ROC curve and disaster product ratio.Results show first the AUC values of the information quantity model and the normalized information quantity model are 0.730 and 0.784,respectively,and the AUC value is increased by 5.4%after the normalization process.Second,the area distribution from very low susceptibility area to very high susceptibility area is significantly different,the normalized information model reduces the area of high and very high susceptibility zones by 428.51 km2.Last,the results show that the normalized information quantity model has a higher accuracy,and the research results provides a more effective method for the prevention and control of geologic hazards in this area.
Yuanling county of Huaihua prefectureinformation quantity modelGISMin-Max normalized analysisgeological hazardsusceptibility assessment
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