地理科学 ›› 2001, Vol. 21 ›› Issue (2): 113-117.doi: 10.13249/j.cnki.sgs.2001.02.113

• 论文 • 上一篇    下一篇

泥石流防灾优先性研究

刘希林1,2   

  1. 1. 北京大学城市与环境学系, 北京 100871;
    2. 中国科学院成都山地灾害与环境研究所, 四川 成都 610041
  • 收稿日期:2000-05-22 修回日期:2000-12-05 出版日期:2001-03-20 发布日期:2001-03-20
  • 基金资助:
    国家自然科学基金资助项目(49771004)、水利部水利科技重点资助项目(SZ9831)、人事部1997年度非教育系统留学回国人员科技活动择优资助A类项目[人字(1997)294号]。

Researh on Debris Flow Prevention Priority

LIU Xi-lin1,2   

  1. 1. Department of Urban and Environmental Sciences, Peking University, Beijing 100871;
    2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041
  • Received:2000-05-22 Revised:2000-12-05 Online:2001-03-20 Published:2001-03-20

摘要: 防灾优先性是减灾决策的组成部分。阐述了防灾优先性与减灾优先性的关系及其在灾害评价中的地位和作用,提出了适合我国国情的泥石流防灾优先性评价模式和计算公式,并应用于四川阿坝州。研究成果可为各级政府和灾害管理部门制定泥石流减灾规划和防治政策提供科学基础和决策依据,亦可为其它灾害类型的防灾优先性评价提供参考模式。

Abstract: Debris flow prevention priority (DFPP) is a part of debris flow mitigation priority (DFMP). DFMP is defined as in a given area and a period of time, the degree of priority for reduction of debris flows should be considered. DFMP is the sum of DFPP and debris flow relief priority (DFRP).Hence DFRP is an important component for hazard assessment.DFPP is directly related to regional hazard degree of debris flow, population density and regional development index. It is quantitatively expressed asP=H×E×M where P is DFPP(10 000 yuan/km2);H is regional hazard degree of debris flow (0-1);E is population density (person/km2);M is per capita GDP(10 000 yuan/person).H is a function of twelve variables relevant to natural characteristics of debris flow. The primary factor is distribution density of debris flow, the secondary factors are involved in environmental background, including geological, geographic, meteorological and climatic factors. Detailed findings are available in previous researches.E indicates the importance of people in the given region. The more the population density, the more important the region. M represents the situation of development in the region. The higher the per capita GDP, the more developed the region, and the more worthy to be prevented from natural hazards.Practice of this method in Aba Prefecture of Sichuan Province has demonstrated that it is significant and feasible. Assessment of DFPP could provide scientific references and decisions on debris flow management and master plan for policy makers of government agents. Furthermore, assessment of DFPP could provide assessment model for other kinds of natural hazards, so as to more widely popularize this methodology in the other parts of China.

中图分类号: 

  • P694