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Publication Date
1-17-2014
Publication Title
Hydrology and Earth System Sciences
Volume Number
18
Issue Number
1
Abstract
Karst aquifers are characterized by highly conductive conduit flow paths embedded in a less conductive fissured and fractured matrix, resulting in strong permeability contrasts with structured heterogeneity and anisotropy. Groundwater storage occurs predominantly in the fissured matrix. Hence, most mathematical karst models assume quasi-steady-state flow in conduits neglecting conduit-associated drainable storage (CADS). The concept of CADS considers storage volumes, where karst water is not part of the active flow system but hydraulically connected to conduits (for example karstic voids and large fractures). The disregard of conduit storage can be inappropriate when direct water abstraction from karst conduits occurs, e.g., large-scale pumping. In such cases, CADS may be relevant. Furthermore, the typical fixed-head boundary condition at the karst outlet can be inadequate for water abstraction scenarios because unhampered water inflow is possible.
Keywords
Karst hydrology, Aquifers, Hydrogeochemistry
Document Type
Article
Digital Object Identifier (DOI)
https://doi.org/10.5194/hess-18-227-2014
Language
English
Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.
Recommended Citation
Reimann, T.; Giese, M.; Liedl, R.; Maréchal, J. C.; and Shoemaker, W. B., "Representation of water abstraction from a karst conduit with numerical discrete-continuum models" (2014). KIP Articles. 8274.
https://digitalcommons.usf.edu/kip_articles/8274
