湖北省地质灾害特征及形成条件研究

Study on the Characteristics and Formation Conditions of Geological Disasters in Hubei Province

为全面掌握湖北省地质灾害发育特征、分布规律及其影响地质灾害发生的主控因素,为地质灾害综合防治提供相关技术支撑,依据2006—2020年湖北省65个县、市(区)的1∶5万地质灾害详细调查资料,运用统计方法,系统总结湖北省地质灾害特征及形成条件。结果表明,湖北省地质灾害类型以滑坡为主,险情、规模总体以小型为主;地质灾害在十堰市及宜昌市较为发育,有38.20%地质灾害发育于长江水系(干流);地质灾害发育年度分布不均衡,与降雨周期密切相关,主要集中于6月及7月。湖北省地质灾害形成受到地形地貌、岩土体类型及地质构造等作用的影响,降雨和人类工程活动是地质灾害发生的主要诱发因素。

In order to fully grasp the development characteristics,distribution law and main controlling factors of geological disasters in Hubei Province,and provide relevant technical support for the comprehensive prevention and control of geological disasters,this paper is based on the 65 counties,cities(districts)in Hubei Province from 2006 to 2020.The detailed survey data of 1∶50000 geological disasters,using statistical methods,systematically summarizes the characteristics and formation conditions of geological disasters in Hubei Province.The results show that the main types of geological disasters in Hubei Province are landslides,and the general disasters and scales are mainly small.The geological disasters are relatively developed in Shiyan and Yichang,38.20%of the geological disasters are developed in the main stream of the Yangtze River.The annual distribution of geological disasters is uneven,closely related to the rainfall cycle,mainly concentrated in June and July.The formation of geological disasters in Hubei Province is affected by topography,rock and soil types,and geological structures.Rainfall and human engineering activities are the main inducing factors for the occurrence of geological disasters.