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为合理模拟给定井内水头条件下地下水人工补给井补给过程,在地下水流数值模拟有限差法程序中加入Thiem公式校正。通过理想算例分析了含水层渗透系数、给水度、地下水埋深及数值模型时空离散尺度对补给井流量计算精度的影响,经实例分析探讨该方法的应用效果。结果表明,给水度、渗透系数等水文地质参数变化对模拟计算结果影响明显,与给定补给流量的传统模拟方法相比,Thiem公式修正法考虑了水头变化对补给量的影响,合理模拟了补给量的动态变化过程。研究成果为模拟补给量的动态变化过程提供了一种方法,为深入分析水文地质参数非均质性对计算结果的影响奠定了基础。
In order to reasonably simulate the recharge process of groundwater artificial recharge wells under given headwater conditions, Thiem formula correction is adopted in the numerical simulation finite difference method of groundwater flow. The influence of the permeability coefficient of aquifer, the water supply, the depth of groundwater and the space-time dispersion scale of the numerical model on the computational accuracy of the recharge well are analyzed by an ideal case. The application effect of this method is discussed through an example analysis. The results show that the variation of hydrogeological parameters, such as water supply and permeability coefficient, has obvious influence on the simulation results. Compared with the traditional simulation method of given supply flow, the Thiem formula correction method considers the influence of water head on the recharge and reasonably simulates the recharge The dynamic process of change. The research results provide a method to simulate the dynamic process of recharge, which lays the foundation for further analysis of the influence of hydrogeological parameters heterogeneity on the calculation results.