城子坡地下水的数值模拟与预测

Numerical Simulation and Prediction of Groundwater in Chengzipo

采用Visual Modflow软件建立地下水系统概念模型和数值模型,从充分利用有限的地下水资源和防止岩溶塌陷的角度出发,针对城子坡地下水制定了两种开采方案并分别对其进行模拟预测。结果表明:将地下水年平均开采量控制在2.35万m3/d以内,丰、枯水期开采量进行适当调整,合理设置开采井,进行分散开采,不仅能保证当地工业和生活用水,还能有效控制地下水位的持续下降,降低岩溶塌陷和污水下渗的危险,实现城子坡地下水资源的可持续利用。

For achieving the sustainable use of groundwater resources in Chengzipo groundwater system, a conceptual and numerical model of groundwater system was established by the Visual Modflow. Form the point view of fully using the limited groundwater re sources and preventing karst collapse, two exploitation plans were developed for forecasting and simulating. The forecast results show that, when controlling the annual exploitation less than 23 500 m3/d and setting drilling wells reasonably, the local industrial and do mestic water can he guaranteed, the continuous declination of water table could be also controlled and the risk of karst collapse and wa ter infiltration can be decreased, and groundwater resources could finally realize the sustainable utilization.