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WANG Ying-jie, WANG Lei, RONG Qi-guo, XIONG Dong. Evaluation index selection of debris flow based on entropy value theory[J]. Journal of Traffic and Transportation Engineering, 2014, 14(2): 28-33.
Citation: WANG Ying-jie, WANG Lei, RONG Qi-guo, XIONG Dong. Evaluation index selection of debris flow based on entropy value theory[J]. Journal of Traffic and Transportation Engineering, 2014, 14(2): 28-33.
shu

Evaluation index selection of debris flow based on entropy value theory

  • 1.

    School of Construction Engineering, Jilin University, Changchun 130026, Jilin, China

  • 2.

    School of Engineering, Peking University, Beijing 100871, China

  • 3.

    Department of Basic Courses, Engineering University of China Armed Police Force, Xi'an 710086, Shaanxi, China

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  • Author Bio:

    WANG Ying-jie (1984-), male, doctoral student, +86-431-85862037, 929031081@qq.com

    WANG Lei (1968-2014), male, professor, PhD, +86-431-85862037, wanglei0431@126.com

  • Received Date: 2013-10-18
  • Publish Date: 2014-04-25
    Abstract
  • Aiming at solving the deficiencies of index weight determination in evaluating risk of geological disaster, the theory of minimum entropy analysis was used to form nonlinear independent components.The index optimization and weight determination were done based on their contributions to debris flow.The index weights were evaluated in the classic debris flow risk evaluation model.The evaluation results were compared with the calculated results.Analysis result shows that the main optimal indexes are the maximum rushed amount for a debris flow, frequency, basin area, main gully length, main gully bed tortuosity coefficient, vegetation coverage, the reserve of loose solid material, basin cutting density and sediment supply length ratio.The corresponding weight values of these indexes are 0.235 3, 0.235 3, 0.079 1, 0.079 1, 0.079 1, 0.079 1, 0.073 0, 0.073 0 and 0.073 0 respectively.The numbers of extreme, heavy, moderate and slight debris flows are 3, 3, 6 and 0 respectively.The calculated results are consistent with the real situation and development trend of studied debris flow area.It proves thereasonability of minimum entropy analysis theory applied in geological disaster risk evaluation.

     

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    • References(14)
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