论文部分内容阅读
提出一个数学模型以研究碳酸盐岩含水层由其原始状态到成熟岩溶含水系统的发育过程。模型由3个模块组成:(a)二维连续空隙水渗流模块,表示裂隙系统(“分散流”系统),即岩溶空管道之间透水性差而贮水性强的那部分岩体;(b)非连续管道网络模块,模拟岩溶管道内发生的层流、紊流运动和溶质运移过程;(c)碳酸盐岩溶蚀模块。管道-裂隙系统模型的模拟结果表明,模拟那种复杂的、具有多种地下水补给方式的岩溶含水盆地的演化是可能的。模拟显示岩溶含水系统发端于泉口,向上游方向扩展,这与其他一些作者基于野外观察、溶蚀实验和电法比拟研究所提出的假说一致。此外,通过检验某些参数对溶蚀过程的影响发现 Ca 的平衡浓度是一个岩溶系统发育极为敏感的因子。
A mathematical model was proposed to study the development of a carbonate aquifer from its original state to a mature karst aquifer. The model consists of three modules: (a) a two-dimensional continuous void water seepage module that represents the fracture system (“dispersed flow” system), that part of the mass of rock that is poorly water-permeable and water- Discontinuous pipeline network module to simulate laminar flow, turbulent flow and solute transport within karst pipelines; (c) Carbonate erosion modules. Simulation results of the pipe-fracture system model show that it is possible to simulate the evolution of a complex karst aquifer that has multiple groundwater recharge options. Simulations show that the karst water system originates in Quankou and extends upstream, consistent with the assumptions made by other authors based on field observations, dissolution experiments, and electrical analogies. In addition, the equilibrium concentration of Ca was found to be a very sensitive factor in karst system development by examining the effect of certain parameters on the dissolution process.