干旱内陆河地区地表水和地下水集成模型及应用

基于水动力学基础建立了地表水和地下水集成模型,分析了地表水和地下水模型集成中的尺度耦合、转化量计算和移动自由液面法等关键技术问题.并采用该模型对一维明渠地表水流、一维和二维饱和一非饱和地下水流典型算例进行了模拟,计算结果符合实际.最后将模型应用于黑河干流中游地区地表水和地下水的转化分析,结果表明,黑河干流在黑河大桥以上约有17%的渗漏,在黑河大桥以下地下水向黑河的排泄量占莺落峡来水的30%左右,而地下水向黑河干流的河泉流量逐年减少.

Integrated model for surface water and groundwater in arid inland river regions and its application

On the basis of hydrodynamics an integrated model for simulating the coupling of surface water and groundwater is established. The scale problem happened to coupling of surface water model and groundwater model, the problem of determination of base flow and the method of moving water table are investigated. The validity of the model is verified by the simulation result of typical examples of 1D open channel flow, 1D and 2D saturated unsaturated flow of groundwater. Finally, the model is applied to analyze the interchange between surface water and groundwater in the middle reaches of Heihe River, which is an inland river located at the arid region of China. The result shows that in the upper reaches of the river about 17% water is infiltrated, about 30% of incoming water of Yingluo Gorge river section located at the downstream of the Heihe Bridge is obtained from groundwater and the spring water coming from groundwater is gradually decreased year by year.