中国地理科学(英文版) ›› 2003, Vol. 13 ›› Issue (2): 112-118.

• 论文 • 上一篇    下一篇

GULLY-SPECIFIC DEBRIS FLOW HAZARD ASSESSMENT IN CHINA

LIU Xi-lin   

  1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, P. R. China
  • 收稿日期:2002-11-25 出版日期:2003-06-20 发布日期:2011-12-15
  • 作者简介:L1U Xi-lin(1963- ), male, a native of Xinshao County of Hunan Province, professor, Ph.D., specialized in debris flow geomorphology and assessment, hazard prediction and management.E-mail:xlliu@ imde.ac.cn
  • 基金资助:

    Under the auspices of the National Natural Science Foundation of China (No.40271002).

GULLY-SPECIFIC DEBRIS FLOW HAZARD ASSESSMENT IN CHINA

LIU Xi-lin   

  1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, P. R. China
  • Received:2002-11-25 Online:2003-06-20 Published:2011-12-15

摘要:

Techniques of gully-specific debris flow hazard assessment developed in four periods since the end of the 1980s have been discussed in the present paper. The improvement for the empirical assessment method is the sectionalized function transformation for the factor value, rather than the classified logical transformation. The theoretical equation of the gully-specific debris flow haz ard is expressed as the definite integral of an exponential function and its numerical solution is expressed by the Poisson Limit Equation. Current methods for assessment of debris flow hazard in China are still valid and practical. The fur ther work should be put on the study of the reliability (or uncertainty) of the techniques. For the future, we should give a high priority to the relationship between debris flow magnitude and its frequency of occurrence, make more developments of prediction model on debris flow magnitude, so as to finally reach the goal of assessing the hazard of debris flow by theoretical model, and realize both actuality assessment and prediction appraisal of debris flow.

关键词: debris flow, hazard, gully-specific debris flow assessment, theore tical equation

Abstract:

Techniques of gully-specific debris flow hazard assessment developed in four periods since the end of the 1980s have been discussed in the present paper. The improvement for the empirical assessment method is the sectionalized function transformation for the factor value, rather than the classified logical transformation. The theoretical equation of the gully-specific debris flow haz ard is expressed as the definite integral of an exponential function and its numerical solution is expressed by the Poisson Limit Equation. Current methods for assessment of debris flow hazard in China are still valid and practical. The fur ther work should be put on the study of the reliability (or uncertainty) of the techniques. For the future, we should give a high priority to the relationship between debris flow magnitude and its frequency of occurrence, make more developments of prediction model on debris flow magnitude, so as to finally reach the goal of assessing the hazard of debris flow by theoretical model, and realize both actuality assessment and prediction appraisal of debris flow.

Key words: debris flow, hazard, gully-specific debris flow assessment, theore tical equation

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