基于MODFLOW的岩溶管道水流模拟方法探讨与应用

发布时间：2018-05-30 03:04

本文选题：管道水流 + 岩溶含水层　；参考：《中国岩溶》2017年03期

【摘要】：针对岩溶管道水流特征,选取广西寨底岩溶流域为研究对象,分别采用三维有限差分地下水流动模型(MODFLOW)中的Drain和River模块概化模拟岩溶管道特征,结合管道内上游、中游及下游三个观测孔对比分析两种方法的适用性,结果表明:末期等水位线图中位于管道两侧处流线均有形状突变,符合实际管道水流动态特征,且能模拟出管道内水位变化趋势。最后分析两种方法模拟管道水流的原理,Drain模块中岩溶管道仅起排水作用,不允许管道内水流流向周围含水层,而River模块允许岩溶管道水与周围含水层水流交换,因而相对Drain模块而言,应用River模块概化模拟岩溶管道更加精确。
[Abstract]:In view of the characteristics of karst pipeline flow, this paper selects the karst basin of Guangxi Zhai bottom as the research object, and simulates the characteristics of karst pipeline by using Drain and River modules in 3D finite difference groundwater flow model (MODFLOW) respectively, combined with the upstream of pipeline. The applicability of the two methods for comparing the three observation holes in the middle and lower reaches of the pipeline is analyzed. The results show that the streamlines on both sides of the pipeline have abrupt changes in shape in the final stage isowater level diagram, which accords with the dynamic characteristics of the actual pipeline flow. And it can simulate the variation trend of water level in pipeline. Finally, the principle of simulating pipeline flow by two methods is analyzed. The karst pipeline in the rain module only plays a drainage role and does not allow the flow in the pipeline to flow to the surrounding aquifer, while the River module allows the flow of karst pipeline water to exchange with the surrounding aquifer. Therefore, compared with Drain module, it is more accurate to use River module to generalize the simulation of karst pipeline.
【作者单位】：中国地质大学(北京)水资源与环境学院;中国地质科学院岩溶地质研究所/国土资源部广西岩溶动力学重点实验室;
【基金】：国家青年科学基金项目“岩溶基岩孔隙、裂隙、管道水流交换机理与三重空隙介质数值模型研究”(41502252) 地质调查项目“红水河上游岩溶流域1∶5万水文地质环境地质调查”(DD20160300)
【分类号】：P641.2

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