在一个流域内，地表水地下水常常存在着密切的水力联系，尤其是在河谷地区。把一个流域内地表水地下水分开进行研究，会使二者的相互联系得不到切合实际的表达。为了解决以往数学模拟模型无法综合考虑地表水地下水在水量水质相互联系这一问题，本文以河谷地区为原型建立假想例，通过采用双重节点耦合法将地表水模型和地下水模型耦合，建立地表水地下水水流联合模拟模型。在此基础上，以对流描述地表水与地下水之间的溶质交换过程，建立地表水地下水水质联合模拟模型。利用HydroGeoSphere软件对构建的联合模拟模型进行求解，预报未来120d研究区内水流和总氮的变化特征。结果表明，研究区地表水地下水补排关系为地表水补给地下水，大量开采地下水会使河口流量减少；随地下水开采量增加，地下水污染加重。
Abstract
In a basin，there is a strong interaction between surface-water( SW) and groundwater( GW) regimes，especially in the valley
region． Doing research on the SW and GW separately usually ignores the link between surface water and groundwater． In order to overcome
this shortcoming，a hypothetical case is suggested in this paper． To establish a SW/GW model，the dual-node approach is used to couple the
flow model of SW and GW． On this basis，the coupling transport model is built by Fick Law． The coupled simulation model will be solved via
HydroGeoSphere to forecast the distribution of flow and total nitrogen in 120 days． The simulation results show that the GW is recharged by
the SW，because surface flux will decrease when the GW is pumped． With the over-withdrawing of underground water，groundwater pollution
is becoming more serious．
关键词
地表水 /
地下水 /
水流联合模拟 /
水质联合模拟 /
HydroGeoSphere
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Key words
surface water /
ground water /
coupled flow model /
coupled solute transport model /
HydroGeoSphere
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参考文献
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