Longitudinal Dispersion and Tracer Migration in a Radial Flow Field

Majs, František; Seaman, John C.

Title:

Longitudinal Dispersion and Tracer Migration in a Radial Flow Field

dc.contributor.author	Majs, František
dc.contributor.author	Seaman, John C.
dc.contributor.corporatename	Savannah River Ecology Laboratory	en_US
dc.date.accessioned	2013-07-05T14:16:57Z
dc.date.available	2013-07-05T14:16:57Z
dc.date.issued	2007-03
dc.description	Proceedings of the 2007 Georgia Water Resources Conference, March 27-29, 2007, Athens, Georgia.	en_US
dc.description.abstract	Hydrodynamic dispersion is an important factor controlling contaminant migration in the subsurface environment. However, few comprehensive data sets exist for evaluating the impact of travel distance and site heterogeneity on solute dispersion under non-uniform flow conditions. In addition, anionic tracers are often used to estimate physical transport parameters based on an erroneous assumption of conservative (i.e., non-reactive) behavior. Therefore, a series of field experiments using tritiated (³H) water and other commonly used hydrologic tracers, bromide (Br) and fluorinate benzoic acid (FBA), were conducted to evaluate solute transport processes in a diverging axisymmetric flow field. Tracer migration was monitored using a set of six, multilevel sampling wells concentrically spaced at distances from 2.0 to 4.5 meters around the injection well. Soil hydraulic parameters for aquifer matrix were inversely optimized and an average longitudinal dispersivity for ³H breakthrough was estimated using numerical finite-element code (i.e., HYDRUS-2D) capable of describing an axisymmetric diverging flow. Tremendous variation in tracer arrival times between similar sampling locations and multiple arrival peaks observed for some sampling locations were observed for both, ³H and Br. Migration of the Br was retarded, when compared to that of the ³H, and analysis of the anion data assuming conservative behavior would thus yield higher dispersivity values than conservative tracer.	en_US
dc.description.sponsorship	Sponsored and Organized by: U.S. Geological Survey, Georgia Department of Natural Resources, Natural Resources Conservation Service, The University of Georgia, Georgia State University, Georgia Institute of Technology	en_US
dc.description.statementofresponsibility	This book was published by the Institute of Ecology, The University of Georgia, Athens, Georgia 30602-2202. The views and statements advanced in this publication are solely those of the authors and do not represent official views or policies of The University of Georgia, the U.S. Geological Survey, the Georgia Water Research Institute as authorized by the Water Resources Research Act of 1990 (P.L. 101-397) or the other conference sponsors.
dc.embargo.terms	null	en_US
dc.identifier.uri	http://hdl.handle.net/1853/48250
dc.language.iso	en_US	en_US
dc.publisher	Georgia Institute of Technology	en_US
dc.relation.ispartofseries	GWRI2007. Poster Presentations	en_US
dc.subject	Water resources management	en_US
dc.subject	Hydrodynamic dispersion	en_US
dc.subject	Contaminant migration	en_US
dc.subject	Hydrologic tracers	en_US
dc.subject	Tracer migration	en_US
dc.title	Longitudinal Dispersion and Tracer Migration in a Radial Flow Field	en_US
dc.type	Text
dc.type.genre	Proceedings
dspace.entity.type	Publication
local.contributor.corporatename	Georgia Water Resources Institute
local.contributor.corporatename	School of Civil and Environmental Engineering
local.contributor.corporatename	College of Engineering
local.relation.ispartofseries	Georgia Water Resources Conference
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