拉萨市城关区地质灾害特征及成灾规律分析  

Analysis of Geological Disaster Characteristics and Disaster Regularity in Chengguan District of Lhasa

作　　者：肖进[1] 胡林[1] 达娃 王维 洛松群培 单增卓玛 XIAO Jin;HU Lin;DA Wa;WANG Wei;LUOSONG Qun-pei;DANZENG Zhuo-ma(Northwest Sichuan Geological Team,BGEEMRSP,Mianyang Sichuan 621000;Geothermal Geological Party,Bureau of Geology and Exploration and Exploitation of Mineral Resources of Tibet Autonomous Region,Lhasa850000)

机构地区：[1]四川省地质矿产勘查开发局川西北地质队,四川绵阳621000 [2]西藏自治区地质矿产勘查开发局地热地质大队,拉萨850000

出　　处：《四川地质学报》2023年第4期657-661,共5页Acta Geologica Sichuan

基　　金：西藏自治区拉萨市城关区1∶5万地质灾害详细调查。

摘　　要：拉萨市城关区地质环境条件脆弱,属地质灾害高易发区。通过对城关区地质灾害详细调查与测绘,发现各类地质灾害隐患点83处,其中泥石流38处,崩塌37处,不稳定斜坡5处,滑坡2处,岩溶崩塌1处;对地质灾害的发育特征、分布规律及其影响因素进行了深入研究,结果表明:城关区地质灾害发育类型多,点多面广、密度大,分布不均衡,呈线状、带状分布;地质灾害多发生在6~8月,与降雨在时间上具有较强相关性,强降雨成为地质灾害的主要诱发因素。The geological environment condition of Chengguan District of Lhasa is fragile,and it is an area with high geological hazard.Through the detailed survey and mapping of geological disasters in Chengguan District,83 hidden points of various kinds of geological disasters were found,including 38 debris flow,37 collapses,5 unstable slopes,2 landslides,and 1 karst collapse.The development characteristics,distribution law and influencing factors of geological hazards are studied deeply.The results show that geological hazards in Chengguan District have the characteristics of multiple development types,multiple points,wide areas,high density,uneven distribution,linear and zonal distribution Geological disasters occur from June to August,and have a strong correlation with rainfall,heavy rainfall is the main inducement factor of geological disasters.

关 键 词：地质灾害 发育特征 成灾规律 拉萨城关区 

分 类 号：P642.23[天文地球—工程地质学]