analytical element method for modeling of groundwater flow in anisotropic aquifer
Modeling of groundwater flow using the analytical element method (AEM) is, in general, restricted to simulations of groundwater flow in an isotropic medium. In many cases, this deficiency forces the users to turn to numerical modeling techniques in favor of otherwise advantageous and user-friendly analytical models. This paper discusses hydrologic simplifications and a transformation of coordinates using the "rubber sheeting" technique that, if used judiciously, can produce a defensible simulation of groundwater flow in a horizontally anisotropic aquifer. The modeling work was performed for an aquifer contaminated with hydrocarbons present in aqueous and separate phases. The aquifer, formed in saprolite rock with relict foliation, displayed an exceptionally high ratio of anisotropy in a horizontal plane. Modeling was conducted using the Multi Layer Analytical Element Model (MLAEM) developed at University of Minnesota.
analytical element anisotropic aquifer mlaem groundwater flow modeling