德州深层地下水开采引发地面沉降变化阈值识别

Identification of threshold value of land subsidence caused by exploiting deep groundwater in Dezhou

针对德州长期过量开采深层水导致地下水位不断下降,引发地面沉降等环境地质问题,以深层地下水动态和地面沉降监测及其对应相关的粘性地层作为主要研究对象,应用地下水动力学和统计学方法,通过对深层地下水水位和地面沉降监测资料分析,确定地面沉降的主要原因为深层地下水过量开采,地面沉降与深层地下水位之间显著相关,德州深层地下水容许水位降深为70.24m。

Aimed at continuous drawdown of water table for over - exploitation and other geo - environmental problems such as land subsidence, this article selected deep groundwater dynamic , land subsid- ence monitoring and corresponding clay layers as main research objects, used groundwater dynamic and statistical methods, analyzed the information of deep groundwater table and land subsidence monitoring data. The results showed the main reason of land subsidence was the over - exploitation of groundwater. Land subsidence and water table of deep groundwater had a notable correlation relationship. The allowable drop of deep groundwater table was 70.24m in Dezhou.