河流-含水层系统数值模拟方法探讨

Discussion on Numerical Simulation for Stream-Aquifer System

地表水与地下水转化量的模拟预测一直是区域水资源评价和管理中的难题。提出了一种基于河流越流系数的处理方法,即将转化量计算模型同三维地下水数值模型完全耦合,能够预测在有人工干预条件下,地表水与地下水转化量的变化趋势。提出的方法适合多含水层系统的情形。实例研究表明,提出的河流-含水层系统模拟方法原理简单,易于实现,可以推广应用。

The analysis and simulation of the interaction between groundwater and surface water is a considerably difficult problem in water resources planning and management.In this paper,a new approach for stream-aquifer system modeling is proposed.The interaction flow model based on stream leakage coefficient is coupled into the three dimensional numerical model.The variations of flow between stream and aquifers can be simulated and predicted under different stresses such as artificial groundwater recharge and withdrawal.The general formula for multi-layer aquifers system is also given in the paper.A case study illustrated that the coupled model is effective in groundwater numerical simulation and prediction.