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遥感技术与应用  2014, Vol. 29 Issue (5): 788-794    DOI: 10.11873/j.issn.1004-0323.2014.5.0788
模型与反演     
基于流域划分的汶川县潜在突发性泥石流危险性评价
杨鑫1,2,杨武年2,刘汉湖2,刘恩勤2
(1.中国地质大学地质过程与矿产资源国家重点实验室,湖北 武汉430074;
2.成都理工大学国土资源部地学空间信息技术重点实验室,四川 成都610059)
Wenchuan Potential Sudden Debris Flow Hazard Assessment based on Watershed Divide
Yang Xin1,2,Yang Wunian2,Liu Hanhu2,Liu Enqin2
(1.State Key Laboratory of Geological Processes and Mineral Resources,
China University of Geosciences,Wuhan 430074,China;
2.Key Laboratory of Geoscience Spatial Information Technology,Ministry of Land and
Resources of the P.R.China,Chengdu University of Technology,Chengdu 610059,China)
 全文: PDF(20863 KB)  
摘要:

泥石流是我国西南山区常见的一种地质灾害。5·12地震构成了众多隐蔽的不稳定斜坡,在强降雨条件下,这些潜在的不稳定斜坡极易形成突发性泥石流。在流域划分的基础上,基于不同尺度将汶川县划分为不同的流域单元,选取评价因子,建立评价模型,最终实现整个汶川县潜在突发性泥石流危险性评价。结果表明:若按集水阈值20万、30万与40万划分流域单元,则潜在突发性泥石流高危险性及以上单元分别有58、59与30个,占流域单元总数的43.61%、67.05%与57.59%。

关键词: 流域潜在突发性泥石流危险性评价    
Abstract:

Debris flow is one of the serious geologic hazards in southwest of China."5.12" Wenchuan earthquake constitute a large number of hidden unstable slopes.In heavy rain conditions,these potentially unstable slopes are very easy to form sudden mudslides.For this purpose,on the basis of the watershed division,the Wenchuan County is divided into different watershed unit using different scales,select the evaluation factor,evaluation model,and achieve the potential sudden whole Wenchuan County Debris Flow Hazard Assessment.The assessment results can provide reference and basis for Wenchuan debris flow disaster prevention and mitigation planning.Meanwhile,the results show that if the watershed scale was 200 000,300 000,400 000,the high and above risk of potential sudden debris flow were 58,59,30,accounting for 43.61%,67.05%,57.59% percent of the total watershed unit.

Key words: Watershed    Potential sudden debris flow    Hazard assessment
收稿日期: 2013-07-04 出版日期: 2014-11-10
:  TP 79  
基金资助:

中国地质大学(武汉)地质过程与矿产资源国家重点实验室开放课题(GPMR201203)。

通讯作者: 杨武年(1954-),男,宁夏中卫人,教授,博士生导师,主要从事3S技术及应用方面的研究。Email:ywn@cdut.edu.cn。    
作者简介: 杨鑫(1984-),男,宁夏中卫人,讲师,博士,主要从事3S工程与数字国土方面的研究。Email:yangxin2012@cdut.cn。
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引用本文:

杨鑫,杨武年,刘汉湖,刘恩勤. 基于流域划分的汶川县潜在突发性泥石流危险性评价[J]. 遥感技术与应用, 2014, 29(5): 788-794.

Yang Xin,Yang Wunian,Liu Hanhu,Liu Enqin. Wenchuan Potential Sudden Debris Flow Hazard Assessment based on Watershed Divide. Remote Sensing Technology and Application, 2014, 29(5): 788-794.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2014.5.0788        http://www.rsta.ac.cn/CN/Y2014/V29/I5/788

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