[1]张子瑜,范建容,张建强,等.芦山地震重灾区地形因子分析[J].山地学报,2013,(05):624.
　ZHANG Ziyu,FAN Jianrong,ZHANG Jianqiang,et al.Topographic Factors Analysis of Lushan Earthquakehit Area[J].Mountain Research,2013,(05):624.
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芦山地震重灾区地形因子分析()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2013年05期
页码:
624
栏目:
“4?22”芦山地震
出版日期:
2013-01-01

文章信息/Info

Title:
Topographic Factors Analysis of Lushan Earthquakehit Area
作者:
张子瑜;范建容;张建强;苏凤环;
1.武汉大学遥感信息工程学院, 湖北 武汉 430079; 　
2.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
Author(s):
ZHANG Ziyu;  FAN Jianrong;  ZHANG Jianqiang;  SU Fenghuan
1.School of Remote Sensing and Information Engineering, Wuhan University,Wuhan 430079,China;
2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences& Ministry of Water Conservancy,Chengdu 610041,China
关键词:
芦山地震; 地形因子; 坡度; 地形位指数; 地形起伏度; 纵比降
Keywords:
Lushan Earthquake;  topographic factors;  slope gradient;  terrain niche index;  relief amplitude;  longitudinal gradient
分类号:
X43
文献标志码:
A
摘要:
地形条件与山地灾害的发育密切相关,是山地灾害危险性评价的重要因子。以四川省芦山县"4·20"7.0级强烈地震灾区的芦山、宝兴、天全3县为研究区,应用GIS技术计算研究区坡度、地形位指数与地形起伏度,通过流域水文分析方法实现宝兴县子流域划分并提取沟床纵比降,分析灾区地形因子特征,结合灾后崩塌滑坡遥感解译结果,探讨次生山地灾害分布与地形因子的关系。结果表明,研究区坡度大于25°的面积占区域总面积的73.89%,地形位指数大于0.4的区域面积占总面积的85.92%,起伏度大于500 m的占87.41%,各地形因子面积比率最大的区段分别为坡度35°～40°、地形位指数0.648～0.666、起伏度50...
Abstract:
Important factors for mountain hazard risk assessment—terrain conditions, are closely related to the occurrence of mountain hazards. The worst earthquakehit areas in Ms7.0 Sichuan Lushan earthquake are Lushan county, Baoxing county and Tianquan county. This paper takes these three counties as study area, applies GIS technology to compute slope gradient, relief amplitude and terrain niche index, divides mudslides subbasins and extracts longitudinal gradient by hydrological analysis methods. Topographic factors are analyzed and the relationship between seismic secondary disaster distribution and topographic factors are discussed by combining collapse and landslides remote sensing interpreted results. It shows that areas with slope gradient more than 25° occupy 7389% of study area, regions have terrain niche index greater than 04 account for 8592% of study area and zones possess relief amplitude greater than 500 m hold 8741% of study area. Zones which contain the most widespread ratio of each topographic factor respectively distribute in areas with slope gradient 35°～40°, terrain niche index 0648～0666 and relief amplitude 500～1 000 m. Baoxing county debris flow gully longitudinal gradient values are overall high and concentrated within the range of 100‰ to 300‰.Regions with 30°～50° slope gradient occur collapse and landslides most. Superior terrain niche of collapse and landslides includes grade 8(terrain niche index from 0228 to 0246) and grade 14 to 28(terrain niche index 034～061). Areas with relief amplitude within the range of 500 m to 1 000 m are collapse and landslides concentrated distribution ones. The result could be a reference for disaster assessments and disaster recovery and reconstruction.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2013-06-03；改回日期(Accepted) : 2013-06-14。
基金项目（Foundation item）：中国科学院重点部署项目（KZZD-EW-05-01）和国家科技支撑计划课题（2011BAK12B03）。[Supported by key deployment project of Chinese Academy of Sciences(Grant No.KZZD-EW-05-01) and National Science and Technology SupportingProgram(Grant No. 2011BAK12B03).]
作者简介（Biography）：张子瑜(1988-)，女，河北石家庄人，硕士研究生，研究方向为GIS与遥感应用。[Zhang Ziyu(1988-), female, born in Shijiazhuang, Hebei Province, postgraduate student, research direction is GIS and RS application.] E-mail: octopus1949@163.com *通信作者(Corresponding author)：范建容(1969-)，女，四川井研人，研究员，博士生导师，主要从事山地环境遥感与地理信息系统研究。[Fan Jianrong(1969-), female, born in Jingyan, Sichuan Province, Professor, Doctor supervisor, mainly engaged in the study of mountain environment remote sensing and GIS.] E-mail: fjrong@imde.ac.cn
更新日期/Last Update: 1900-01-01