河流──含水层相互作用条件下数值计算问题

非完整河地表水与地下水相互作用是傍河地区水资源评价实践中经常碰到的问题，如何用数值法来模拟这一复杂的水量交换过程，目前尚无理想的办法，以往做法的局限在于计算中只把河流当边界对待。作者在分析河流─含水层相互作用机理的基础上，采用了建立河流─含水层水力偶合模型的办法来解决问题，在建立含水层水流模型的同时，还建立了与之相适应的河流水量均衡模型。模型运转结果表明，该方法能正确模拟地表水与地下水相互转换过程，可自动计算开采条件下河流的诱发补给量以及河流径流量，从而有效地避免地表水与地下水资源的重复计算，为傍河地区水资源评价和管理提供了理想的计算方法。

A Coupled Hydraulic Model under Stream-aquifer Interaction

t has been known that if a partially penetrated stream is treated as a boundaryin a numerically modelling an aquifer,there will be some practical inconvenience understream-aquifer interaction. Especially,if the flow between the stream and the aquifer develops from saturation to unsaturation or vice versa, this process could not be successfullysimulated. A coupled stream-aquifer model, which focused on the interaction, was developed in this paper. Instead of being regarded as a boundary,the partially penetrated streamwas also modelled. The result of a given example verfied that the model could be used tosimulate various stream aquifer interaction.