Confined-unconfined flow in a horizontal confined aquifer
Author(s)
Li, Ling
Lockington, D A
Barry, D A
Parlange, J Y
Date issued
2003
In
Journal of Hydrology
Vol
1-4
No
271
From page
150
To page
155
Subjects
mixed flow Boussinesq equation moving boundary sorptivity Boltzmann transformation BOUSSINESQ EQUATION GROUNDWATER
Abstract
Mixed confined and unconfined groundwater flow occurs in a bounded initially dry aquifer when the hydraulic head at the side boundary suddenly rises above the elevation of the aquifer's top boundary. The flow problem as modelled by the Boussinesq equation is non-trivial because of the involvement of two moving boundaries. The transformed equation (based on a similarity transformation) can, however, be dealt with more easily. Here, we present an approximate analytical solution for this flow problem. The approximate solution is compared with an 'exact' numerical solution and found to be a very accurate description for describing the mixed confined and unconfined flow in the confined aquifer. (C) 2002 Elsevier Science B.V. All rights reserved.
Publication type
journal article