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Debris flow hazard assessment with numerical simulation

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Abstract

Debris flow disasters are usually accompanied by serious loss of lives and properties. However, debris flows are also part of earth’s natural phenomenon, and so what is the reasonable budget to be spent on mitigation measures becomes an important issue for the budget allocation processes. This article utilizes economic concepts to propose a reasonable estimation of the hazard damage and the cost of proposed mitigation measures. The proposed method is composed of four steps, namely, delineating the area of the disaster with different return periods, itemizing the land use within those areas, calculating the hazard loss using official values, and computing the expected probable maximum loss with a probability distribution. The comparison between the assessment of hazard and the economic gains of any proposed mitigation measures can be used as a reference for future decision-making process.

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Acknowledgment

This research is supported by National Science Council, Taiwan.

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Authors and Affiliations

  1. Department of Civil Engineering, National Taiwan University, Taipei, Taiwan

    Ko-Fei Liu & Yu-Charn Hsu

  2. Socio-Economic System Division, National Science & Technology Center for Disaster Reduction, Taipei, Taiwan

    Hsin-Chi Li

Authors
  1. Ko-Fei Liu
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  2. Hsin-Chi Li
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  3. Yu-Charn Hsu
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Correspondence to Ko-Fei Liu.

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Liu, KF., Li, HC. & Hsu, YC. Debris flow hazard assessment with numerical simulation. Nat Hazards 49, 137–161 (2009). https://doi.org/10.1007/s11069-008-9285-8

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  • DOI: https://doi.org/10.1007/s11069-008-9285-8

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