岩溶区地下水数值模拟研究进展

徐中平; 周 训; 崔相飞; 拓明明; 王昕昀; 张 颖

doi:10.11932/karst20180401

岩溶区地下水数值模拟研究进展

doi: 10.11932/karst20180401

1.
中国地质大学(北京)水资源与环境学院
2.
中国地质大学(北京)水资源与环境学院/中国地质大学（北京）地下水循环与环境演化教育部重点实验室

基金项目: 北京市自然科学基金项目（8152026）

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出版历程
- 发布日期: 2018-08-25

Research advances of numerical simulation of groundwater in karst areas

1.
School of Water Resources and Environment, China University of Geosciences
2.
School of Water Resources and Environment, China University of Geosciences/MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing)

摘要

摘要: 岩溶含水介质的不均一性导致岩溶地下水流动、溶质运移和热量迁移的数学模拟研究成为地下水模拟的难点。本文综述了岩溶区地下水流模拟的几种方法，重点阐述了等效多孔介质法、双重连续介质法和三重介质法的定义、发展过程和适用范围，并回顾了这几种方法的研究成果。从等效多孔介质法到三重介质法，模拟精度不断提高，适用范围也逐渐由大区域实际问题向小区域理论研究过渡。介绍了溶质运移模拟和热迁移模拟的研究方法及实例。溶质运移模拟以对流弥散方程为基础，其中尺度效应是溶质运移模拟的重点研究问题；热量迁移模拟应考虑地下热水密度变化对地下热水运动的影响。溶质运移模拟和热量迁移模拟往往是将迁移模型和已经调试成功的地下水流动模型相耦合，从而达到模拟溶质及热量迁移的目的。由于溶质运移和热量迁移的复杂性，现阶段水流模型多数处于等效多孔介质模型阶段。综合理论及实际应用，指出精确刻画裂隙及管道和注重基础数学算法是岩溶水数值模拟进步的关键。
- 地下水 /
- 岩溶 /
- 数值模拟 /
- 溶质运移 /
- 热量迁移
Abstract: The heterogeneity of karst aquifer media makes it difficult to perform numerical simulation of groundwater flow, solute transport and heat migration in karst zones. This article provides a brief overview of several methods to simulate groundwater in karst areas, and focuses on the equivalent porous medium, double porosity and the triple porosity models. The definition, development, applicable scope and several research findings of these models are reviewed. From the equivalent porous medium method to the triple porosity model, the simulation accuracy has been continuously enhanced, and the scope of application has gradually shifted from large regional practical problems to theoretical research of small areas. Several research methods and examples for the simulation of solute transport and heat migration are also presented. The simulation of solute transport is based on the convection dispersion equation and the scale effect is the focus of the solute transport simulation. The influence of density change of underground hot water on the movement of groundwater should be considered in heat migration simulation. The simulations of solute transport and heat transfer are often coupled with the model of groundwater flow which has been successfully debugged so as to achieve the purpose of simulating the solute and heat transfer. Because of the complexity of solute transport and heat transfer, the equivalent porous medium model is commonly applied to most of the water flow models at this stage. The authors point out that paying attention to the depiction of fractures and conduits as well as the basic mathematical algorithm is the key to make progress in the numerical simulation of groundwater in karst areas.
- groundwater /
- karst /
- numerical simulation /
- solute transport /
- heat migration

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