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地下水数值模拟是地下水资源评价的有效方法,它涉及的是井孔-含水系统的问题。当今在建立地下水流概念模型、数学模型上往往忽视对井孔的描述和井流特征的分析,或缺乏符合水流机理的模拟技术。该文以疏勒河流域玉门-踏实盆地地下水流问题为例,分析了建立三维流基本模型的必要性,重点剖析了目前国际上应用最广的MODFLOW软件在模拟混合抽水井的不妥,涉及到混合观测孔、自流井和泉等的模拟问题以及河流、渠系、降雨滞后补给潜水的刻画问题,这些在提高玉门-踏实盆地地下水流概念模型和数值模型的仿真性上十分关键。
Numerical simulation of groundwater is an effective method for groundwater resources assessment, which involves the issue of wellbore-aquifer system. Nowadays, the conceptual model of groundwater flow is established. Mathematical models usually ignore the description of borehole and the analysis of well flow characteristics, or lack of simulation technology that is in line with current mechanism. Taking the groundwater flow in Yumen-Tactic Basin in Shulehe River Basin as an example, this paper analyzes the necessity of establishing the basic model of 3D flow, and analyzes the problems that the most widely used MODFLOW software in the world is to simulate mixed pumping wells. The simulation problems such as mixed observation wells, artesian wells and springs, as well as the portrayal of rivers, canal systems and rainfall lagging recharge submersibles are crucial in improving the simulation of conceptual and numerical models of groundwater flow in the Yumen-Taibian Basin.