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Hazard Assessment of Potential Debris Flow Using Linear Combination Based on Analytic Hierarchy Process (AHP)—a Case Study for Changhua County, Taiwan

Szu-Hsien Peng 1, Chuan Tang 2, and Qunsheng Fang 2
1. Department of Spatial Design, Chienkuo Technology University, Changhua City, Taiwan
2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, China
Abstract—The present research uses a simple and direct method to assess the hazard rating of potential debris flows in Changhua County of Taiwan based on field investigation and numerical simulation. Taking 7 potential debris flow areas in Changhua County as the research objects, linear combination is utilized to evaluate the hazard rating of debris flow disaster in disaster-prone areas. In addition, Analytic Hierarchy Process (AHP) is applied to design the expert questionnaire for determining the factor weight, and pair-wise comparison is used to calculate the eigenvector as the weights of criteria. The calculated weights are further used for the hazard assessment. In addition, scenario simulations by FLO-2D can offer information which was not obtained in the current investigations. The priority of hazard rating in the 7 potential debris flow areas can be obtained based on this assessment.

Index Terms—hazard assessment, potential debris flow, Analytic Hierarchy Process (AHP), FLO-2D

Cite: Szu-Hsien Peng, Chuan Tang, and Qunsheng Fang, "Hazard Assessment of Potential Debris Flow Using Linear Combination Based on Analytic Hierarchy Process (AHP)—a Case Study for Changhua County, Taiwan," International Journal of Structural and Civil Engineering Research, Vol. 6, No. 3, pp. 211-214, August 2017. doi: 10.18178/ijscer.6.3.211-214
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