汶川地震触发武都区和文县地质灾害发育特征研究

英文篇名：Distribution rules of geo-hazards induced by Wenchuan Earthquake
中文刊名：岩土工程学报
英文刊名：Chinese Journal of Geotechnical Engineering
作者：钟秀梅 ; 陈文凯 ; 侯景瑞 ; 袁中夏
英文作者：ZHONG Xiu-mei1 ; 2 ; 3 ; CHEN Wen-kai1 ; HOU Jing-rui1 ; 2 ; 3 ; YUAN Zhong-xia1 ; 2 ; 3(1.Lanzhou Institute of Seismology ; China Earthquake Administration ; Lanzhou 730000 ; China ; 2.Open Laboratory of Loess Earthquake Engineering ; China Earthquake Administration ; Lanzhou 730000 ; China ; 3.Geotechnical Disaster Prevention Engineering Technology Research Center of Gansu Province ; Lanzhou 730000 ; China)
中文关键词：汶川地震 ; 地震地质灾害 ; 发育特征 ; GIS分析
英文关键词：Wenchuan Earthquake ; earthquake-induced geo-hazard ; distribution rule ; GIS analysis
出版日期：2011-08-15
机构：中国地震局兰州地震研究所;中国地震局地震黄土地震工程开放实验室;甘肃省岩土防灾工程研究中心;
年：2011
期：S1
出版单位：岩土工程学报

摘要

汶川地震在甘肃省触发了大量的崩塌、滑坡等地质灾害,武都区和文县的地质灾害尤为发育,占甘肃省灾害总量的75%,因此,通过灾后对地震地质灾害的现场调查和遥感解译,共获得该区地质灾害点993处。在此基础上,利用GIS技术对地震地质灾害的分布与河流水系、烈度、高程等因素的关系进行统计分析。研究得出:①地震地质灾害在区域上具有沿河流水系成线状分布的特点;②地震地质灾害密度随烈度的增加而增大;③大部分地震地质灾害分布在高程1000～2000 m的中高山地貌区;④地形坡度是地震地质灾害发育的控制性因素之一,绝大部分灾害集中在坡度10°～40°的范围内;⑤坡向对地震地质灾害的发育也有影响,正南坡向和东南坡向的地质灾害较为发育。
Wenchuan Earthquake causes a large number of geo-hazards in Wudu District and Wenxian County of Gansu Province.After a field investigation and the interpretation of remote-sensing images taken after the earthquake,993 earthquake-induced geo-hazards are obtained.Then,the distribution of these geo-hazards is investigated statistically using GIS techniques to determine how the occurrence of geo-hazards correlates with distance from the rivers,slopes,elevations and aspects.The main results of this research can be summarized as follows:(1) the geo-hazards triggered by earthquake show the feature of zonal distribution along the rivers;(2) the geo-hazards density increases with the increase of earth intensity;(3) the earthquake-induced geo-hazards have corresponding relationship with the elevation,and for most hazards occur below the elevation of 1000 to 2000 m;(4) the slope steepness is a main factor which controls the development of earthquake-induced geo-hazards and a vast majority of geo-hazards are distributed within the range of 10°to 40°;(5) aspect influences on the geo-hazards triggered by the Earthquake,and more hazards occur in aspect of due south and southeast.

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