徐州大屯中心区地面沉降机理分析与危险性评价

Mechanism Analysis and Hazard Assessment on Land subsidence in Datun Central District of Xuzhou City

地面沉降已经成为世界主要的环境地质灾害,过量抽取地下水是地面沉降主要的诱发因素。徐州大屯中心区从1976年开始观测地面沉降,1988年建立了地面沉降观测系统,观测数据显示2006年累积沉降量达到873mm。本文以该地区20多年的地下水位观测、地面沉降观测资料为基础,在地理信息系统软件ArcGIS支持下,分析了该地区地面沉降发展演化及沉降机理,并根据累积沉降量进行了危险性评价。

Land subsidence has became a chief environmental geohazard in the world, which is mainly induced by overdraft of groundwater. Datun central district in Xuzhou City started observing subsidence in 1976, and built a monitoring system in 1988. The data of 2006 shows the amount of accumulative subsidence has been 873mm. In this paper, based on the data observed for more than 20 years, the evolvement and mechanism of land subsidence are analyzed on the platform of ArcGIS. According to the accumulative subsidence, the hazard is assessed.