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Two‐dimensional modeling of aquifer remediation influenced by sorption nonequilibrium and hydraulic conductivity heterogeneity
Author(s) -
Rabideau Alan J.,
Miller Cass T.
Publication year - 1994
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/93wr03414
Subject(s) - hydraulic conductivity , aquifer , sorption , advection , environmental remediation , non equilibrium thermodynamics , geotechnical engineering , nonlinear system , mechanics , soil science , diffusion , geology , environmental science , thermodynamics , groundwater , chemistry , physics , contamination , soil water , adsorption , ecology , organic chemistry , quantum mechanics , biology
A computational model was developed to simulate aquifer remediation by pump and treat for a confined, perfectly stratified aquifer. A split‐operator finite element numerical technique was utilized to incorporate flow field heterogeneity and nonequilibrium sorption into a two‐dimensional, radially symmetric advective‐dispersive transport model. Simulations reproduced the tailing behavior commonly observed at remedial sites. Predicted remediation times were observed to increase as the degree of hydraulic conductivity heterogeneity and/or sorption nonequilibrium increased. Dimensional analysis was used to facilitate the general application of simulation results to a range of aquifer/contaminant systems. The effects of sorption nonlinearity, sorption capacity heterogeneity, and intermittent pumping were also analyzed.