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Journal of Mountain Science

, Volume 2, Issue 1, pp 50–58 | Cite as

Characteristics of large low-frequency debris flow hazards and mitigation strategies

  • Wang Shige 
Article

Abstract

A low-frequency debris flow took place in the north coastal range of Venezuela on Dec. 16, 1999, and scientists all over the world paid attention to this catastrophe. Four characteristics of low-frequency debris hazard are discussed: long return period and extreme catastrophe, special rare triggering factors, difficulty in distinguishing and a series of small hazards subsequent to the catastrophe. Different measures, such as preventing, forecast — warning, engineering, can be used for mitigating and controlling the catastrophe. In engineering practice, it is a key that large silt-trap dams are used to control rare large debris flow. A kind of low dam with cheap cost can be used to replace high dam in developing countries. A planning for controlling debris flow hazard in Cerro Grande stream of Venezuela is presented at the end of this paper.

Keywords

Low-frequency debris flow mitigation strategies 

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References

  1. Anders Rapp, Jian Li, Rolf Nyberg. 1991. Mudflow disasters in mountainous areas. AMBIO 20(6): 210–218Google Scholar
  2. Maria E. Bello et al. 2001. Recent experiences in the design and numerical simulation of debris flow control works. Proc. LACAFLUM 2001, V Latin American and Caribbean Congress on Fluid Mechanics, May, 14–17, held at the Simon Bolivar University, Caracas, Venezuela.Google Scholar
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  5. WANG Shige, LI Deji. 2000. Low-frequency debris flow control in Cerro Grande and Uria, Vargas, Venezuela. Proc. International Workshop on The Debris Flow Disaster of December 1999 in Venezuela (in print)Google Scholar

Copyright information

© Institute of Mountain Hazards and Environment, CAS(IMHE) and Science Press 2005

Authors and Affiliations

  • Wang Shige 
    • 1
  1. 1.Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengduP.R. China

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