摘要
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 flow,involved with wellbore-waterbearing system, is an effective approach in groundwater resource evaluation. But now the conceptual model and mathematical model of groundwater flow are always set up without description of wellbore and analysis of well flow, or lack of simulation technique which accord with the feature of water flow. In the paper, with numerical simulation of groundwater flow in Yumen-Tashi Basin, Shulehe River, China, the necessity to set up three-dimensional flow model is analyzed, and the problem about simulation of multilayer pumping well using MODFLOW software which is used widely in the world is analyzed in detail. The simulation of multilayer observation well, artesian well and spring, and the depiction of the hysteresis character of river, canal and precipitation recharging groundwater are also mentioned in the paper. These problems are very important to improve the precision of the conceptual model and the numerical model of groundwater flow in Yumen-Tashi Basin.
出处
《勘察科学技术》
2005年第1期15-18,共4页
Site Investigation Science and Technology
基金
地调项目:中国地调局"河西走廊典型地区地下水合理利用调查评价"资助
