Approximate Analytic Solutions to 3D Unconfined Groundwater Flow Within Regional 2D Models
Journal of Hydrology
We present methods for finding approximate analytic solutions to three-dimensional (3D) unconfined steady state groundwater dow near partially penetrating and horizontal wells, and for combining those solutions with regional two-dimensional (2D) models. The 3D solutions use distributed singularities (analytic elements) to enforce boundary conditions on the phreatic surface and seepage faces at vertical wells, and to maintain fixed-head boundary conditions, obtained from the 2D model, at the perimeter of the 3D model. The approximate 3D solutions are analytic (continuous and differentiable) everywhere, including on the phreatic surface itself. While continuity of flow is satisfied exactly in the infinite 3D how domain, water balance errors can occur across the phreatic surface. (C) 2000 Elsevier Science B.V. All rights reserved.
Luther, K. and Haitjema, H. M., "Approximate Analytic Solutions to 3D Unconfined Groundwater Flow Within Regional 2D Models" (2000). Mathematics and Computer Science Faculty Publications. 23.