Modelling the genesis of karst aquifer systems using a coupled reactive network model
Modelling the genesis of karst aquifer systems using a coupled reactive network model
复制标题
使用耦合反应网络模型模拟岩溶含水层系统的成因
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
G. Teutsch
中科院分区：
文献类型：
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作者：
T. Clemens;Dirk Huckinghaus;M. Sauter;R. Liedl;G. Teutsch
为了了解碳酸盐岩含水层从初始阶段到成熟岩溶含水层的演化过程，建立了一个数值模型。该模型由三个模块组成：（a）二维多孔连续流模块，代表裂隙系统（“扩散”流系统），即岩溶内传导性较低的高储集性导管间块，（B）离散管网，用于模拟导管中的流动和运输，其中可能发生层流和湍流，以及（c）碳酸盐溶解模块。模拟结果表明，在不同的地下水补给机制下，模拟岩溶地下水流域的复杂演化是可能的。模拟结果表明，岩溶系统的演变是在春季开始，并在一个由几个作者假设的基础上，现场观察，溶液实验和电模拟研究的方向进展。此外，一些参数对岩溶作用过程的影响进行了研究。对于成熟岩溶系统的发育，钙的平衡浓度被认为是一个非常敏感的参数。
IT order to understand the evolution of a carbonate aquifer from its initial stage to a mature karst aquifer a numerical model has been developed. The model consists of three modules: (a) a 2-D porous continuum flow module, which represents the fissured-system ("diffuse" flow system) i.e. the less conductive high storage interconduit blocks within the karst, (b) a discrete pipe network for modelling flow and transport in the conduits, where laminar and turbulent flow may occur, and (c) a carbonate dissolution module. The results of the simulations with a conduit and fissured system show that it is possible to simulate the complex evolution of karst groundwater catchments, with different mechanisms of groundwater recharge. The simulation demonstrates that the evolution of karst systems is initiated at the spring and progresses in an upgradient direction as postulated by several authors based on field observations, solution experiments and electrical analogue studies. Further, the effect of some parameters on the karstification process is examined. For the development of mature karst systems, the equilibrium concentration of calcium was found to be a very sensitive parameter.