Aldicarb Transport in Subsurface Environment: Comparison of Models
Publication: Journal of Environmental Engineering
Volume 126, Issue 2
Abstract
In this paper, two different pesticide transport simulation models are presented and compared to carry out preliminary analysis on the applicability of those models in determining ground-water vulnerability to aldicarb contamination. The first model is a physically based analytical model that simulates 1D pesticide movement in soils, based on the concept of complete mixing and 2D advective-dispersive transport in the aquifer. The second model is a numerical simulation model that links the existing numerical codes PRZM2, MODFLOW, and MT3D to simulate pesticide transport in the subsurface. The concentrations of aldicarb residues in soil and in the aquifer calculated by the two models are found to be in good agreement. However, the analytical model tends to produce an earlier arrival of the peak concentration in each year due to the assumption of complete mixing. It is also found that the infiltrating water following aldicarb application plays a significant role on the leaching potential of aldicarb, which is also affected by various meteorological and hydrological factors as well as by agricultural practices.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 126 • Issue 2 • February 2000
Pages: 121 - 129
History
Received: Mar 2, 1999
Published online: Feb 1, 2000
Published in print: Feb 2000
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