三峡水库蓄水后地质灾害活跃性强度指数研究  

Research on intensity index for activity of geo-hazard after impoundment of Three Gorges Reservoir

作　　者：童广勤[1,2] 余祖湛[3] 钟言[2] 

机构地区：[1]中国地质大学(武汉)研究生院,湖北武汉430074 [2]水利部长江勘测技术研究所,湖北武汉430011 [3]湖北省秭归县国土资源局,湖北秭归443600

出　　处：《人民长江》2011年第22期23-26,共4页Yangtze River

摘　　要：为了分析评价三峡水库蓄水后库区地质灾害的活动情况,在调查地质灾害发生情况的基础上,对地质体受库水影响的时间、空间分布特征进行了分析,并据此概化、预测了三峡水库蓄水对库区地质体影响的趋势。在此基础上,引入了地质灾害活跃性强度指数对库区地质灾害活跃性强度与面密度比进行了分析比较。结果显示:库区局部地段发生了较强的灾害体演变现象,符合新建水库初期蓄水库周滑坡、塌岸再造的通常规律;目前,库区地质灾害活动处于较强阶段;水库蓄水8～10 a后,区库地质灾害发生水平将渐趋稳定。In order to analyze the activity of geo-hazard after impoundment of Three Gorges Reservoir,on the basis of investigation of the occurrence of geo-hazard,the temporal and spatial distribution characteristics of geo-hazard affected by impoundment are analyzed.Accordingly,the trend of impact of impoundment is generalized and predicted.On this basis,the intensity index for activity of geo-hazard is introduced to analyze and compare the activity and area density of geo-hazard.The analysis result shows that in local area of Three Gorges Reservoir area,stronger geo-hazard evolution trend has happened,which conforms with the general law of landslide,bank collapse and re-forming around the newly-built reservoir;at present,the geo-hazard activity in the reservoir area is in stronger period;8～10 years after impoundment,the geo-hazard activity in the reservoir area will be in a balance state.

关 键 词：地质灾害 活跃性评价 水库蓄水 三峡库区 

分 类 号：P642.2[天文地球—工程地质学]