鄂西远安县地质灾害发育特征与形成条件分析

Analysis on the development characteristics and formation conditions of geological hazards in Yuan'an county, Western Hubei

在对远安县地质灾害进行详细调查的基础上,通过成果资料数据统计,梳理出研究区地质灾害数量、类型、规模等发育特征,同时对其时空分布特征和形成条件进行系统分析。研究表明,该县地质灾害具有爆发频率高、突发性强、危害大、隐蔽性强的特点。地灾灾害分布发育与地貌有密切的关系,滑坡灾害主要分布于县域东部的低山丘陵区,崩塌灾害主要分布于县域西部的中低山区,县域中部的冲积平原区地质灾害不发育;时间上,地质灾害多集中发生雨季。区内地质灾害形成的内在因素为地形地貌、地层岩性和地质构造,外在因素为降雨和人类工程活动。

Based on the detailed investigation and results of data statistics of geological hazards in Yuan＇an Coun-ty, we sort out the development characteristics of the quantity, type and scale of geohazards in the study area. Atthe same time, the spatial and temporal distribution characteristics and formation conditions were systematicly an-alyzed. Through investigation, it is evident that geological hazards in this county break out frequently, occur sud-denly, and have serious harm and strong concealment. The distribution of the disaster is closely related to thelandform. The landslide disaster is mainly distributed in the hilly area of the eastern part of the county. The col-lapse disaster is mainly distributed in the middle and low mountain areas in the western part of the county. Thegeological disasters in the central area are not well developed. Most of the geological disasters occur during therainy season. The internal factors affecting the formation of the geological disasters include topography, lithologyand geological structure while external factors include rainfall and human activity in this region.