Simulation of Novel Groundwater Lowering Technique using Arbitrary Lagrangian-Eulerian Method

Y. Jin, E. Holzbecher, and P. Oberdorfer
Applied Geology
Geoscience Centre
Georg-August-University Göttingen
Göttingen, Germany

A novel method for groundwater lowering, which can be applied at construction sites, for aquifer remediation measures or in open mining, is proposed. In contrast to conventional techniques, dewatering is achieved without water conveyance. In this paper the physical concept of the new technology, referred as single borehole pump & inject, is modeled using COMSOL Multiphysics.

Two and three dimensional models are developed respectively and potential equation derived from Darcy’s law is solved. The dynamics of hydraulic head changes in unconfined aquifer is modeled using arbitrary Lagrangian-Eulerian (ale) moving mesh method. Numerical results from the model show the same trends as measured data from field experiments.