广东省英德市地质灾害发育特征及形成条件研究

Research on Geological Disaster Development Characteristics and Formation Conditions in Yingde City,Guangdong Province

英德市位于广东省东北部,自然环境脆弱,在降雨条件下极易诱发地质灾害,属地质灾害高发市。本文在对英德市近10年来已发地质灾害调查统计的基础上,对英德市地质灾害形成条件、发育特征及时空分布进行研究,结果表明:英德市主要地质灾害类型为崩塌、滑坡、泥石流和岩溶地面塌陷等,影响因素主要有内部控制条件和外部诱发因素两个方面,灾害时空分布特征明显,规律性较强,发生时间与灾害性暴雨产生时间基本同步,空间上具有明显区域分布特征,研究结果为英德市地质灾害防治工作提供科学依据。

Yingde is located in the northeastern part of Guangdong Province and has a fragile natural environment. Geological disasters can easily be induced under rainfall conditions. It is a city with high geological risk. Based on the investigation and statistics of geological disasters in the past 10 years in Yingde City,this paper studies the conditions,development characteristics and spatial and temporal distribution of geological hazards in Yingde City. The results show that the main types of geological disasters in Yingde are collapse,landslide,debris flow and karst ground subsidence. The main factors are internal control conditions and external inducing factors. The spatial and temporal distribution of disasters is obvious,and the regularity is strong. It is basically synchronized with the time of the occurrence of severe rainstorms,and has obvious regional distribution characteristics in space. The research results provide scientific basis for the prevention and control of geological hazards in Yingde.