摘要
含水层渗透性的各向异性可以使用渗透系数张量来表征;在进行各向异性含水层的渗流场数值模拟时,渗透张量主值的大小和主方向都会对渗流场产生显著的影响。如何合理的建立能够的反映含水层的各向异性的数值模型非常关键。本文通过分析MODFLOW2005的数学模型、离散方法和差分公式,探讨了MODFLOW2005中含水层渗透系数张量主值大小及方向参数的赋值方法、条件和可行性。认为在MODFLOW2005中使用数值模型网格旋转方法可以实现一定条件下的渗透张量计算。并使用实例验证了理论分析的结果,对比了渗透张量主值的方向对渗流场的影响。
The anisotropy of aquifer permeability can be characterized by the permeability coefficient tensor;when the numerical simulation of the seepage field of the anisotropic aquifer is carried out,the magnitude and main direction of the permeability tensor will have a significant effect on the seepage field. How to reasonably establish a numerical model that can reflect the anisotropy of the aquifer is critical. By analyzing the mathematical model,discrete method and difference formula of MODFLOW2005,this paper discusses the method,condition and feasibility of the value of the main value of the permeability coefficient tensor and the direction parameter of MODFLOW2005. It is believed that the numerical model grid rotation method can be used in MODFLOW2005 to calculate the permeability tensor under certain conditions. The results of theoretical analysis are verified by an example. The influence of the direction of the main value of the permeability tensor on the seepage field is compared.
作者
陈刚
徐世光
刘春学
郭良
吕磊
CHEN Gang;XU Shi-guang;LIU Chun-xue;GUO Liang;LV Lei(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming,650000 China;Yunnan Provincial Geological Prospecting Engineering Corp.,Kunming,650000 China;School of Urban and Environ-ment,Yunnan University of Finance and Economics,Kunming,650000 China)
出处
《地下水》
2020年第4期1-5,共5页
Ground water
基金
基于裂隙三维空间分布的矿区地下水流动模拟研究(NO.41562017)。
