HR: 0800h
AN: H51F-0435    [Abstracts]
TI: Biodegradation and Transverse Mixing: Controlling Processes in Aquifer Remediation
AU: * Ham, P A
EM: ham@geo.uu.nl
AF: University of Utrecht, Budapestlaan 4, Utrecht, 3584 CD Netherlands
AU: Schotting, R J
EM: schotting@geo.uu.nl
AF: University of Utrecht, Budapestlaan 4, Utrecht, 3584 CD Netherlands
AU: Berentsen, C
EM: berentsen@geo.uu.nl
AF: University of Utrecht, Budapestlaan 4, Utrecht, 3584 CD Netherlands
AB: A two-dimensional biodegradation model is considered including simultaneous transport and biodegradation of organic contaminant, electron acceptor and, moreover, growth and decay of micro-organisms in a two-dimensional half plane. Three enhanced natural attenuation (ENA) problems are studied: Instantaneous point source, continuous point source, and line source (y>0) injection of electron acceptor into a flow domain initially contaminated everywhere by a mobile organic contaminant species and filled with an immobile microbial species. In each case, injection of the electron acceptor leads to the development of a dispersive mixing zone between the zone where the biomass is activated and the inactive zone. The base model consists of three coupled nonlinear partial differential equations. In the time-dependent cases, these three equations are reduced to two coupled equations whilst in the stationary cases, the problem is reduced further. A numerical solution is used to investigate the role of biodegradation and hydrodynamic (transversal) dispersion on plume development and aquifer remediation.
DE: 1800 HYDROLOGY
DE: 1829 Groundwater hydrology
DE: 1831 Groundwater quality
DE: 1832 Groundwater transport
DE: 1847 Modeling
SC: Hydrology [H]
MN: Fall Meeting 2005