西南交通大学学报 2012, 47(3) 387-393 DOI:   10.3969/j.issn.0258-2724.2012.03.006  ISSN: 0258-2724 CN: 51-1277/U

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本文关键词相关文章
道路
泥石流
堵江
危险性
肖家沟
本文作者相关文章
向灵芝
崔鹏
钟敦伦
葛永刚
朱兴华
杨伟
PubMed
Article by Xiang,L.Z
Article by Cui,p
Article by Zhong,T.L
Article by Ge,Y.G
Article by Zhu,X.H
Article by Yang,w

汶川地震区泥石流危害道路的定量分析——以汶川县肖家沟为例

向灵芝1,2,3, 崔鹏1, 钟敦伦1, 葛永刚1, 朱兴华1,2,3, 杨伟1,2,3

1. 中国科学院水利部成都山地灾害与环境研究所, 四川 成都 610041;
2. 中国科学院山地灾害与地表过程重点实验室, 四川 成都 610041;
3. 中国科学院研究生院, 北京 100039

摘要

为适应震后3年泥石流大规模频发的严峻形势,满足灾情预测评估的需要,以汶川县省道303沿线肖家沟为例,建立了震后泥石流危害道路的定量分析方法.通过现场勘察并结合RS、GIS技术,分析了震后肖家沟泥石流发育的环境地质背景、流域面积、沟床比降以及泥石流性质等基本特征;采用雨洪法和配方法计算肖家沟泥石流一次过程总量,作为泥石流堆积量预测值;通过回归分析,获得了泥石流堆积体危害范围的计算公式,以确定泥石流的平均堆积厚度、长度和宽度;最后,采用几何概化方法,就肖家沟泥石流对沿河道路的危害程度进行了量化分析.结果表明,在50年一遇的降水频率下,肖家沟泥石流一次过程总量为41 万m3,道路完全掩埋,并堵断渔子溪,计算结果与实际情况一致.

关键词 道路   泥石流   堵江   危险性   肖家沟  

Quantitative Hazard Assessment of Road Debris Flow in Wenchuan Earthquake Area: A Case Study of Xiaojia Ravine in Wenchuan County

XIANG Lingzhi1,2,3, CUI Peng1, ZHONG Dunlun1, GE Yonggang1, ZHU Xinghua1,2,3, YANG Wei1,2,3

1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
2. Key Lab of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Chengdu 610041, China;
3. Graduated School of Chinese Academy of Sciences, Beijing 100039, China

Abstract:

A quantitative assessment method of debris flow hazard to roads in Wenchuan earthquake areas was established based on the case study of Xiaojia ravine to assess serious debris flow disasters happening frequently in 3 years after the Wenchuan earthquake. The environmental and geology background and the basic parameters such as the area and gradient of Xiaojia ravine were anglicized through a field investigation and using the RS and GIS technologies. The total amount of once debris flow process calculated by the rain-storm and flood method and the method of completing the square was taken as the pile quantities. Pile scope parameters, including average pile thickness, length and width, were estimated by a regression expression derived from field investigation data. Then the damage degree of debris flow to the roads beside Yuzi river was calculated quantitatively by the geometric generalization method. The research shows that the total amount of once debris flow process is 41×104 m3 under rainfall that occurs once every 50 years, the roads will be completely buried and the river blocked by the debris flow. The above results are basically coincident with the actual hazard situation.

Keywords: road   debris flow   blocking river   hazard   Xiaojia ravine  
收稿日期 2011-08-31 修回日期  网络版发布日期 2012-05-29 
DOI: 10.3969/j.issn.0258-2724.2012.03.006
基金项目:

国家973计划资助项目(2011CB409902); 国家自然科学基金资助项目(40801009)

通讯作者: 崔鹏(1957-),男,研究员,博士生导师,主要研究方向为泥石流等山地灾害,电话:028-85214421,E-mail:pengcui@imde.ac.cn
作者简介: 向灵芝(1980-),女,博士研究生,研究方向为山地灾害风险分析,电话:13688378035,E-mail:xlz1223@yahoo.com.cn

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