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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Groundwater flow and transport simulation for a confined aquifer using analytic element method and r...
Groundwater flow and transport simulation for a confined aquifer using analytic element method and random walk particle tracking.
Author : PARTHA MAJUMDER1 T.I. ELDHO2
ABSTRACT
In this paper, the groundwater flow and transport processes in a confined aquifer have been simulated using analytic
element method (AEM) and random walk particle tracking (RWPT). The implementation of coupled AEM-RWPT to
simulate solute transport processes is the first time in the field of groundwater flow and transport process. The AEM solves
the groundwater flow equation by superposition of the analytic solution of simple hydrogeological features like, well, river,
lake, recharge, etc. One of the main advantages of AEM is that, it generates continuous head and velocity, thus very
suitable for particle tracking process, unlike finite difference (FD) or finite element (FE) based model where velocity needs
to be interpolated from the nodal values. First using AEM, analytic elements are developed to represent pumping well,
constant head boundary, no flow boundary, river, recharge etc. Thereafter, using AEM the flow processes of a
hypothetical confined aquifer has been simulated. It is assumed that, there is an instantaneous injection of certain
pollutant mass in the aquifer. The contaminant mass is represented by a large number of particles and solute transport
process have been simulated by random walk particle tracking technique. The RWPT moves each particle by using the
velocity field obtained from the AEM based flow simulation model to simulate advection and adds a random displacement
to simulate dispersion. RWPT solves the transport equation directly and thus it is virtually free from numerical dispersion
and artificial oscillations.
File Size : 382,996 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 19/08/2015
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