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Analytical Solutions and Simulation Approaches for Double Permeability Aquifers
Authors:Konstantinos N Moutsopoulos  Vassilios A Tsihrintzis
Affiliation:(1) Laboratory of Ecological Engineering and Technology, Department of Environmental Engineering, School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greece
Abstract:In this paper we develop analytical solutions for 1D unsteady flow in an infinite double permeability aquifer. Two asymptotic cases are considered: the near-hydraulic-equilibrium-state and the far-hydraulic-equilibrium-state. It is demonstrated that for both cases the equation for the piezometric head can be expressed in leading order, as the classical solution of the simple permeability medium, to which correction terms are added. On the basis of these findings the accuracy of the simulations using conventional approaches (i.e. MODFLOW, MT3D codes) is discussed, while decision tools for the choice of the adequate double continuum model are also provided.
Keywords:Double permeability  Double porosity  Analytical solutions  Aquifer simulation  Contaminant transport
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