倾斜地下水含水层3维简化数值模型  

A Simplified 3D Numerical Model for Groundwater Flow in Declining Aquifer-aquitard System

作　　者：朱焱[1] 杨金忠[1] 童菊秀[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《四川大学学报（工程科学版）》2010年第6期43-50,共8页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家"863"计划课题(2006AA100205);国家自然科学基金(50639040);武汉大学2008年博士研究生自主科研项目

摘　　要：针对倾斜含水层3维简化数值模拟问题,提出了柱体单元水头梯度平均面的概念,建立了倾斜非等厚柱体单元水头梯度平均面的计算方法。以水头梯度平均面为基础,进行柱体单元水量均衡计算,得到不规则柱体单元的侧向流量项和弹性释水项,含水层层间水力联系通过有限差分法进行计算,由此建立倾斜含水层3维简化数值计算模型,运用该模型模拟了不同条件下地下水运动状态,将模拟结果与通用地下水模拟软件VisualModflow和Feflow进行对比分析,模拟得到的水头结果正确、合理,处理边界更加方便,计算效率较高。The mean head gradient plane of the irregular triangle column volume was proposed to solve the simplified numerical simulation problem of groundwater in irregular and declining aquifer-aquitard system.According to the results of water balance in a finite volume based on the mean head gradient plane,the net lateral flux and elastic storage of the element were calculated.The vertical water flow flux between upper and lower layers was computed by the finite difference method.The simplified 3D numerical model was obtained from the proposed method and applied to simulate the groundwater flow in different hypothetic groundwater exploitation conditions.The comparison of the results of the proposed model with Visual Modflow and Feflow showed good agreement of the three models and its advantage over Visual Modflow for the declining and irregular aquifer-aquitard system.

关 键 词：地下水 3维简化数值模型 倾斜非等厚含水层 

分 类 号：P641.2[天文地球—地质矿产勘探]