An integrated linear/non-linear flow model for the conduit-fissure-pore media in the karst triple void aquifer system |
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Authors: | J. M. Cheng C. X. Chen |
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Affiliation: | (1) Department of Hydrogeology and Water Resources, School of Environmental Studies, China University of Geosciences, 430074 Wuhan, China;(2) Department of Earth and Planetary Sciences, John Hopkins University, Baltimore, MD 21218, USA |
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Abstract: | Most karstic aquifer media may be characterized as the triple-void media with highly-varied hydraulic properties, including matrix pore, fissure and conduit, in which liner flow may co-exist with non-linear flow. In this paper, an attempt is made to couple linear flow with non-linear flow in a single unified flow governing equations by introducing the concept of equivalent hydraulic conductivity (EHC) and deriving a general Darcys law for various flow. The expression of EHC in the karst conduit and fissure are also derived. The procedures of numerical implementation are demonstrated via an ideal model and a case study of karst aquifer system in the Beishan Ore Formation area, Guangxi Autonomous Region, China. |
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Keywords: | Karst triple media Conduit-fissure-matrix Linear/nonlinear flow Numerical model General Darcy /content/b1x18ne0w9l9dthc/xxlarge8217.gif" alt=" rsquo" align=" BASELINE" BORDER=" 0" >s law form China |
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