Water Table Rise in Sloping Aquifer due to Canal Seepage and Constant Recharge
Publication: Journal of Irrigation and Drainage Engineering
Volume 128, Issue 3
Abstract
Analytical solutions of the linearized Boussinesq equation and a fully implicit finite-difference numerical solution of the nonlinear Boussinesq equation were obtained to study transient and steady-state water table rise in a homogeneous, isotropic, and incompressible unconfined sloping aquifer. The rise was due to seepage from two canals located at different elevations above the sloping impermeable barrier and constant recharge from the land surface. Proposed analytical solutions were verified with existing analytical solutions for a horizontal aquifer and were found in close agreement. The effect of recharge and slope of the impermeable barrier on water table rise predicted by both analytical and numerical solutions was studied by considering a numerical example. The effect of the linearization of the Boussinesq equation on water table rise was also studied by comparing the water table heights predicted by the numerical solution with those computed from the analytical solution. The analytical solution overestimates water table elevations compared to those obtained from the numerical solution, and the difference in water table in the middle region decreases with increase in time.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 128 • Issue 3 • June 2002
Pages: 160 - 167
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Aug 31, 2000
Accepted: Apr 16, 2001
Published online: May 15, 2002
Published in print: Jun 2002
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