那曲地区比如县地质灾害发育特征及成灾规律分析

DEVELOPMENT CHARACTERISTICS AND DISASTROUS RULE RESEARCH OF GEOLOGIC HAZARDS IN BIRU COUNTY,NAQU

比如县处于青藏高原腹部,新构造运动强烈,地质环境脆弱,地质灾害较发育。为了查明区内的地质灾害发育特征及成灾规律,通过开展1∶5万地质灾害风险性调查,结果发现区内发育地质灾害124处,其中泥石流52处,滑坡51处,崩塌21处,具有点多面广、分布极不均匀的特点;地质灾害的分布范围及发育程度与地形地貌、地质构造、岩土体类型、斜坡结构、水文地质条件、降雨、人类工程活动和地震等十分密切。通过调查研究,有效地提高了比如县地质灾害研究程度,为防灾减灾提供了技术支持。

BiRu County is located in the abdomen of Qinghai-Tibet Plateau,where the neotectonic movement is strong,the geological environment is fragile,and the geologic hazards are relatively developed.In order to find out the development characteristics and disastrous rule of geologic hazards in the area,through the 1∶50000 geological disaster risk survey,it was found that there are 124 geological hazards in the area,including 52 debris flow,51 landslides,and 21 collapses,with the characteristics of multiple areas and uneven distribution.The distribution range and development degree of geological hazards in the study area are closely related to landform,geological structure,type of rock and soil mass,slope structure,hydrogeological conditions,rainfall,human engineering activities and earthquakes.Through the investigation and study,the research degree of geological disaster has been effectively improved and technical support has been provided for disaster prevention and reduction.