Three-dimensional finite element modelling for consolidation due to groundwater withdrawal in a desaturating anisotropic aquifer system
✍ Scribed by Kim, Jun-Mo; Parizek, Richard R.
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 379 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0363-9061
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✦ Synopsis
A poroelastic numerical model is presented to evaluate three-dimensional consolidation due to groundwater withdrawal from desaturating anisotropic porous media. This numerical model is developed based on the fully coupled governing equations for groundwater #ow in deforming variably saturated porous media and the Galerkin "nite element method. Two di!erent cases of unsaturated aquifers are simulated for the purpose of comparison: a cross-anisotropic soil aquifer, and a corresponding isotropic soil aquifer composed of a geometrically averaged equivalent material. The numerical simulation results show that the anisotropy has a signi"cant e!ect on the shapes of three-dimensional hydraulic head distribution and displacement vector "elds. Such an e!ect of anisotropy is caused by the uneven partitioning of the hydraulic pumping stress between the vertical and horizontal directions in both groundwater #ow "eld and solid skeleton deformation "eld.