陕北延安“7.3暴雨”诱发地质灾害主要类型与特征  

Main Types and Characteristics of the Geo-Hazards Triggered by Heavy Rain on July 3 in Yan′an,Shaanxi

作　　者：黄玉华[1] 武文英[1] 冯卫[1] 李政国[1] 

机构地区：[1]国土资源部黄土地质灾害重点实验室,中国地质调查局西安地质调查中心,陕西西安710054

出　　处：《西北地质》2014年第3期140-146,共7页Northwestern Geology

基　　金：国土资源大调查项目"延安市地质灾害调查与综合研究"(1212011140001)

摘　　要：2013年7月3日以来,陕西延安地区百年不遇的持续性强降雨,引发了大量的崩塌、滑坡、泥流地质灾害,造成严重的财产损失和人员伤亡。通过野外实地调查,对本次持续性强降雨诱发大范围地质灾害的主要类型和特征进行了较为系统的研究。研究表明,本次持续性强降雨引发的地质灾害共计8 000余处,灾害类型主要有崩塌、滑坡和泥流,分别以小规模黄土崩塌、浅表层黄土滑坡、坡面型黄土泥流为主,以及上述灾种链生转化形成的沟谷型泥流。在持续降雨条件下,多灾种转化而成的复合型灾害是造成人员伤亡和财产损失的主要类型。Great amount of geo-hazards have been triggered by the continuous heavy rain since July 3, 2013 in Yan＇an. It made a serious threat to the local inhabitants properties and lives. Based on lots of site-investigations of these regions, this paper made a systematic research on the main types and characteristics of the landslide. To conclude, three main types of geo-hazards were identified, including landslide, collapse and debris flow, especially small-scale loess collapse, shallow loess landslide, debris flow on slope and gully debris flow caused by hazards chains. In the continuous rainfall conditions, the composite geo-hazard is the primary disaster leading to casualty and property loss.

关 键 词：地质灾害 延安地区 7.3暴雨 主要类型 发育特征 

分 类 号：P642.2[天文地球—工程地质学]