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Risk Evaluation of Debris Flow Hazard Based on Asymmetric Connection Cloud Model

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  • Xinyu Xu
  • Mingwu Wang
  • Yafeng Li
  • Libiao Zhang

Abstract

Risk assessment of debris flow is a complex problem involving various uncertainty factors. Herein, a novel asymmetric cloud model coupled with connection number was described here to take into account the fuzziness and conversion situation of classification boundary and interval nature of evaluation indicators for risk assessment of debris flow hazard. In the model, according to the classification standard, the interval lengths of each indicator were first specified to determine the digital characteristic of connection cloud at different levels. Then the asymmetric connection clouds in finite intervals were simulated to analyze the certainty degree of measured indicator to each evaluation standard. Next, the integrated certainty degree to each grade was calculated with corresponding indicator weight, and the risk grade of debris flow was determined by the maximum integrated certainty degree. Finally, a case study and comparison with other methods were conducted to confirm the reliability and validity of the proposed model. The result shows that this model overcomes the defect of the conventional cloud model and also converts the infinite interval of indicators distribution into finite interval, which makes the evaluation result more reasonable.

Suggested Citation

  • Xinyu Xu & Mingwu Wang & Yafeng Li & Libiao Zhang, 2017. "Risk Evaluation of Debris Flow Hazard Based on Asymmetric Connection Cloud Model," Mathematical Problems in Engineering, Hindawi, vol. 2017, pages 1-8, October.
  • Handle: RePEc:hin:jnlmpe:5348149
    DOI: 10.1155/2017/5348149
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    Cited by:

    1. Na Su & Linrong Xu & Bo Yang & Yongwei Li & Fengyu Gu, 2023. "Risk Assessment of Single-Gully Debris Flow Based on Dynamic Changes in Provenance in the Wenchuan Earthquake Zone: A Case Study of the Qipan Gully," Sustainability, MDPI, vol. 15(15), pages 1-20, August.
    2. Yan Li & Jianguo Wang & Keping Ju & Shengyun Wei & Zhinan Wang & Jian Hu, 2024. "Assessing the Susceptibility of the Xiangka Debris Flow Using Analytic Hierarchy Process, Fuzzy Comprehensive Evaluation Method, and Cloud Model," Sustainability, MDPI, vol. 16(13), pages 1-19, June.

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