Simulation of the development of karst aquifers: role of the epikarst
Simulation of the development of karst aquifers: role of the epikarst
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DOI：
10.1007/s005310050252
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发表时间：
1999-05
影响因子：
2.3
通讯作者：
T. Clemens;Dirk Huckinghaus;R. Liedl;M. Sauter
中科院分区：
文献类型：
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作者：
T. Clemens;Dirk Huckinghaus;R. Liedl;M. Sauter
考虑岩溶地下水流动和方解石溶蚀动力学，模拟了岩溶含水层的演化过程。特别地，模拟了表层岩溶水的入渗，它控制着潜水带补给的时空分布。结果表明，岩溶管道的演化始于春季。优先流道的存在导致了高导电性的所谓树枝状洞穴系统的演化，即集中水流并排出集水区的单一通道。随着时间的推移，直接流入管道系统的欠饱和水量增加，导致管道扩大的速度加快。岩溶含水层的演化可分为三个阶段：(a)初始阶段；(b)扩大阶段；(c)停滞阶段。
The evolution of a karst aquifer is modelled taking into account the karst groundwater flow as well as the dissolution kinetics of calcite. In particular, infiltration of water from the epikarst is simulated which controls the temporal and spatial distribution of recharge to the phreatic zone. The results show that the evolution of karst conduits is initiated in the spring. The existence of preferential flow paths leads to the evolution of highly conductive so-called dendritic cave systems, i.e., single passages which concentrate the flow and drain the catchment. With time, the amount of undersaturated water flowing directly into the conduit system is increased leading to an acceleration of the conduits enlargement. Three phases are identified for the evolution of karst aquifers: (a) an initiation stage; (b) an enlargement stage; and (c) a stagnation phase.