广西北山岩溶管道-裂隙-孔隙地下水流数值模拟初探

Preliminry numerical study of karst conduit fissure pore groundwater flow in Beishan area in Guangxi province

本文从水动力学角度分析各种岩溶含水介质中的水流特征，将其归纳为储水介质、导水介质和控水介质，并根据折算渗透系数ＫＬ的概念和建立的耦合达西流和非达西流于一体的岩溶管道－裂隙－孔隙三重介质地下水模型，对广西环江北山矿区岩溶含水系统进行了初步探讨。北山实例的模拟结果表明，三重介质模型较全面地刻画了岩溶水动态的特征，反映了相对均匀裂隙流与控制性管道流并存、线性流与非线性流相互转变的运动特点，不仅理论上比较合理，在模拟技术上也是可行的。

From view of the different hydraulic effects on the grounder flow, karst media is divided inot three kind of voids: storage media, transmissibility media and control media. According to the concept of equivalent hydraulic conductivity K L and the unified governing equation of karst triple void media which coupled darcy flow with non darcy flow, a karst tube fissure pore triple media model is constructed to simulate karst aquifer system in Beishan area in Guangxi province. It shows that, the triple karstic void media cna describe the characteristics of karst bearing water media and the flow feature which karstic turbulent flow coexists with homogeneous darcy flow. The model is not only reasonable, but also feasible in simulation technique.