湖北省当阳市地质灾害发育特征及易发程度分区评价

通过调查,认为当阳市地质灾害主要为滑坡和采空塌陷,地质灾害的发育与地形坡度、红层或松散土层、集中降雨和人类工程活动等关系密切.依据地质灾害发育现状和地质灾害发育规律、致灾因子,利用GIS信息系统空间分析方法,对各因子进行属性叠加统计分析,对当阳市地质灾害易发程度进行了分区评价.指出地质灾害高易发区主要分布在淯溪、庙前和王店等镇乡的矿区以及人类工程活动密集的区域.

Developmental Feature and the Occurrence Level of Geological Hazard District Assessment in Danyang city, Hubei Province

According to plenty of field surveys about Danyang city of Hubei province,the paper pointed out that the major types of geological hazard are landslide and march collapse,and the causes and mechanism of these geological hazards embody some aspects such as topographic gradient,red beds (or loose stuff bed),abduction of rainstorm and human activities etc.On the other hand,the paper carry on the occurrence level of geological hazard district assessment in Danyang area.The major procedure of the evaluation method is as follow: firstly summarize lead-hazard factors based on analyzing the developmental feature and regulation of geological hazard,then stack-analyzed all lead-hazard factors attribute by statistics method and the spatial analysis of GIS technology.The result shows the high occurrence level of geological hazard mainly distributes these area about frequent human activities such as ore district,where is lies in Yuxi town,Miaoqian town and Wangdian town.