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Cloud model-based evaluation of landslide dam development feasibility.

Dengze Luo1,2, Hongtao Li1,2, Yu Wu1,2

  • 1State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan, China.

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Summary

Landslide dams pose risks but offer resources. A new cloud model evaluation method assesses their development feasibility, showing Hongshiyan dam is viable and Tangjiashan dam is not, aiding disaster management.

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Area of Science:

  • Geotechnical Engineering
  • Natural Hazard Management
  • Resource Development

Background:

  • Landslide dams present dual challenges: threats to human settlements and infrastructure, alongside potential for hydro-energy and tourism.
  • Effective management requires assessing the feasibility of dam development for remediation and resource utilization.

Purpose of the Study:

  • To construct an index system for evaluating landslide dam development feasibility.
  • To propose an improved evaluation method incorporating cloud models to handle uncertainty and randomness.
  • To assess the development feasibility of specific landslide dams using the proposed method.

Main Methods:

  • Development of an index system with target, rule, and index layers.
  • Application of a cloud model-improved evaluation method for determining membership and score clouds.
  • Utilizing a cloud model-improved analytic hierarchy process (AHP-Cloud Model) for weight determination.
  • Hierarchical weighted summary for final evaluation results.

Main Results:

  • The cloud model effectively represents fuzziness and uncertainty inherent in the evaluation process.
  • The proposed method overcomes limitations of the maximum membership principle by preserving fuzziness.
  • Hongshiyan landslide dam exhibits relatively high development feasibility, while Tangjiashan landslide dam shows low feasibility.

Conclusions:

  • The developed cloud model-improved evaluation method provides a more direct and informative assessment of landslide dam development feasibility.
  • This methodology is significant for formulating long-term management strategies for landslide dams, balancing risk mitigation with resource exploitation.