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[1]XU Yanqin,BAI Shuying,XU Yongming.Comparative Analysis of Debris Flow Susceptibility Assessment Based on Two Methods in Panxi District[J].Research of Soil and Water Conservation,2018,25(03):285-291.

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Comparative Analysis of Debris Flow Susceptibility Assessment Based on Two Methods in Panxi District

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 03 Page number: 285-291 Column: Public date: 2018-04-10

Title:: Comparative Analysis of Debris Flow Susceptibility Assessment Based on Two Methods in Panxi District

Author(s):: XU Yanqin¹, BAI Shuying^1,2, XU Yongming¹; 1. College of Geography and Remote Sensing, Nanjing University of Information Science & Technology, Naijing 210044, China;
2. Naijing Institute of Environmental Sciences, Ministry of Environmental Protection, Naijing 210042, China

Keywords:: debris flow; susceptibility assessment; contribution weight superposition model; certainty factor method

CLC:: P642.23

DOI:: -

Abstract:: The assessment of debris flow susceptibility is the basic work of debris flow risk assessment and vulnerability assessment, which can provide the basis for the prediction of debris flow disaster prevention. Taking the Panxi district of Sichuan Province as a study area, the weights of debris flow factor were determined by using contribution weight superposition method (CWS) and the Certainty Factor (CF) method, the multi factor evaluation model is adopted for debris flow susceptibility assessment and mapping, the frequency comparison model combining with the actual debris flow point was used for testing accuracy of the results. The assessment results of the two methods have high similarity to the overall distribution of the zoning results. High and very high prone areas of debris flow mainly distribute in the fault distribution in the central, southern and eastern parts of Panxi District as well as the Yalong River, Jinsha River and its tributaries on both sides. The evaluation accuracy of the deterministic weight model based on CF is higher than that of the contribution weight model. The numbers of debris flow of the two methods in the high prone areas and beyond account for 87.5%, 58.22% of the total number of actual debris flow points, and the frequency ratios are 6.02, 3.71. The assessment result based on method for determining weight by the certainty factor has the higher accuracy, this method can effectively evaluate the debris flow susceptibility of Panxi.

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