IMHE OpenIR  > 山地灾害与地表过程重点实验室
小区域地震地质灾害空间分布特点分析方法探讨
Alternative TitleMETHOD DISCUSSION ON SPATIAL DISTRIBUTION ANALYSIS OF EARTHQUAKE INDUCED GEOHAZARDS IN SMALL REGION
孟华君1,2,3; 乔建平1,2; 田宏岭1,2; 王志刚4
Corresponding Author孟华君
2014
Source Publication工程地质学报
ISSN1004-9665
Volume22Issue:01Pages:14-23
Other Abstract 统计分析方法是研究地震地质灾害的基本方法,很多学者以灾害面积和灾害数量为基础数据提取了不同的评价指标对地震滑坡的空间分布特点进行评价。在使用灾害数量或点密度等指标进行分析时,存在很大的局限性,需要通过实地调查确认等手段严格保证数据的精确性。以白沙河流域作为研究区域,选取了灾害面积比(P h)、灾害数量比(P n)和地表面积比(P a)作为3个评价参数,通过相互对比的方法揭示了地震灾区小流域——都江堰白沙河流域内地震地质灾害的主要分布范围分别为坡度30°~50°,高程1450~2740m,坡向为E-SW向坡。结果表明,该方法简单易行,可以更加全面的快速评估地震灾区小流域地质灾害的空间分布特征,提供较多的灾害信息,判断小流域地表破坏严重程度,为防灾减灾及灾后重建提供帮助。同时发现,地震地质灾害的主要集中分布区与破坏严重区并不一定重合,因此,在对地震灾害进行空间分布分析时需要同时对这两个方面进行分析,不可忽略。将分析结果与汶川震区已有成果进行了对比发现,汶川地震灾区的地质灾害主要分布区存在坡度和高程上限,分别为50°和3000m;白沙河流域的地质灾害坡向分布与北川—映秀断裂走向关系密切,其主要分布坡向中间值与断裂走向夹角约90°,但在该研究区灾害的分布不存在"背坡面效应"的特点;该流域内地震地质灾害的分布与岩性分布相关性较弱。; Statistical analysis is a basic method to study the spatial distribution of earthquake induced geo-hazards. Many scholars have analyzed spatial distribution characteristics for the earthquake induced geo-hazards by selecting different evaluation indexes. Among all of these indexes,the hazards number and hazards number density are unreliable until field investigation to confirm the accuracy of the hazards data. Thus,this paper presents a method to study the spatial distribution law of earthquake induced geo-hazards in the Baisha river basin of Dujiangyan county by using three parameters. They are P_a,P_h and P_n. They can reduce the negative influence of geo-hazards numbers. The statistical results show that this method is simple and effective for revealing the general characteristics of hazards distribution and more information about hazards scales. In addition,the method uses a new index[C] to measure the extent of ground damaged in small watershed. Findings are as follows. The main distribution area of geo-hazards is not equal to the zones damaged worst. The main distribution area of seismic induced geo-hazards is 30° ~50°in slope gradient,1540~2740m in slope elevation,and E-SW in slope aspect. By the contrast analysis of this results and other scholars' statistical results,it can be found that the distribution area exists upper limit in slope gradient and elevation,50°and 3000m respectively. Besides,the main distributed slope aspect is closely relate to the strike direction
Keyword地震地质灾害 分布特征 地表破坏 评估方法
Indexed ByCSCD
Language中文
CSCD IDCSCD:5070408
Funding Organization“十二五”科技支撑计划项目(2011BAK12B01)资助
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/10018
Collection山地灾害与地表过程重点实验室
山地表生过程与生态调控重点实验室
Affiliation1.中国科学院成都山地灾害与环境研究所
2.中国科学院地表过程与山地灾害重点实验室
3.中国科学院大学
4.中冶成都勘察研究总院有限公司
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
孟华君,乔建平,田宏岭,等. 小区域地震地质灾害空间分布特点分析方法探讨[J]. 工程地质学报,2014,22(01):14-23.
APA 孟华君,乔建平,田宏岭,&王志刚.(2014).小区域地震地质灾害空间分布特点分析方法探讨.工程地质学报,22(01),14-23.
MLA 孟华君,et al."小区域地震地质灾害空间分布特点分析方法探讨".工程地质学报 22.01(2014):14-23.
Files in This Item:
File Name/Size DocType Version Access License
小区域地震地质灾害空间分布特点分析方法探(558KB)期刊论文出版稿开放获取CC BY-NC-NDView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[孟华君]'s Articles
[乔建平]'s Articles
[田宏岭]'s Articles
Baidu academic
Similar articles in Baidu academic
[孟华君]'s Articles
[乔建平]'s Articles
[田宏岭]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[孟华君]'s Articles
[乔建平]'s Articles
[田宏岭]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 小区域地震地质灾害空间分布特点分析方法探讨_孟华君.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.