天津市汉沽区深层地下水演变研究

根据天津市汉沽区地下水历史资料，分析区域地下水开采量、水位埋深、地面沉降变化及它们之间的联系等。发现汉沽区地下水处于长期超采状态，地下水位也呈逐年下降趋势，地面不断下沉，地下水的过量开采是引起地面沉降和水位持续下降的主要原因。通过建立汉沽区地下水流-地面沉降模型，设定三个水平年地下水开采方案，预测未来地下水位埋深及地面沉降变化。预测表明，随着地下水开采量的消减，地下水位逐步上升，地面下沉趋势可得到遏制。

Study on Deep Groundwater Evolution in Hangu District of Tianjin

By analyzing past data of groundwater in Hangu District, Tianjing, the paper makes a study on groundwater ex- ploitation quantity, groundwater depth, land subsidence and the relationship between the three. Results show that groundwater in the studied area has been over exploited for a long time, which makes groundwater level dropping and the land sinking con- stantly. To prevent the situation from worsening, the paper puts forward three groundwater exploitation schemes, which are then tested by Hangu groundwater flow - land subsidence model. Results indicate that groundwater level may recover and land subsidence may stop if groundwater exploitation quantity decrease.