Abstract
This paper discussed theory and methodologies of debris-flow risk assessment and established an implementation process according to indicators of debris-flow hazard degree, vulnerability, risk degree, etc. Among these methodologies, historical and potential hazard degree was comprehensively considered into hazard assessment and hazard index was presented to indicate the debris-flow hazard degree. Regarding debris-flow vulnerability assessment, its statistical data and calculating procedure were based on the hazard-degree regionalization instead of administrative divisions, which improved the assessing scientificity and precision. These quantitative methodologies integrated with Geography Information System (GIS) were applied to the risk assessment of debris flows in the upper reach of Yangtze River. Its results were in substantial agreement on investigation data and the actual distribution of debris flows, which showed that these principles and methodologies were reasonable and feasible and can provide basis or reference for debris-flow risk assessment and disaster management.
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Foundation item: Supported by the National Natural Science Foundation of China (40671153), the Scientific Research Fund of Hunan Provincial Education Department (05C175) and the Knowledge Innovation Program of Chinese Academy Sciences (KZCX2-YW-302)
Biography: HAN Yongshun (1974–), male, Lecturer, research direction: risk assessment and management of mountain hazards and digital mitigation.
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Han, Y., Liu, H., Zhong, D. et al. Gls-based risk assessment of debris flow disasters in the upper reach of Yangtze River. Wuhan Univ. J. of Nat. Sci. 12, 657–662 (2007). https://doi.org/10.1007/s11859-006-0352-2
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DOI: https://doi.org/10.1007/s11859-006-0352-2
Key words
- debris flow
- risk assessment
- principles and methodologies
- geography information system
- upper reach of Yangtze River