2012 NGWA Ground Water Summit: Innovate and Integrate

Measuring Groundwater Velocity in the Field: Rewards of Success and Consequences of Failure

Tuesday, May 8, 2012: 1:10 p.m.-2:30 p.m.
Royal Ballroom A (Hyatt Regency Orange County)
Among the most basic hydraulic characteristics of interest to those studying groundwater is velocity. Velocity is a primary cause of lags we see in the response times of various hydrogeologic, geochemical, and biogeochemical systems. Local velocities are notoriously difficult to predict due to insensitivities in Darcy calculations that are based on conventional hydraulic head data. Site scale velocities are particularly important for the purposes of risk assessment and remediation design. At the regional scale, studies have found that tracers assumed to behave conservatively (e.g., isotopes) have been transported at rates not consistent with other data. The purpose of this session is to review cases illustrating successes and challenges in measuring groundwater velocity at various scales, including cases showing lag times of practical importance caused by velocity-related issues. In addition, this session will highlight cases illustrating velocity estimation without resorting to Darcy’s law, including examples of emerging technologies for improving the estimation of groundwater velocity.
J.F. Devlin, Ph.D. and David L. Rudolph, Ph.D., PE
1:10 p.m.
Integration of Physical Hydrogeologic Data to Enhance the Performance of an In Situ Denitrification System in a Heterogeneous Aquifer
David L. Rudolph, Ph.D., PE, University of Waterloo;
P.C. Schillig, University of Kansas;
J.F. Devlin, Ph.D., University of Kansas;
Catherine Critchley, Golder Associates Ltd.;
Jane Shaw, University of Waterloo

1:30 p.m.
Monitoring Water and Contaminant Fluxes in Aquifers, Streams, and Hyporheic Zones
Kirk Hatfield, University of Florida;
Harald Klammler, Federal University of Bahia;
Michael D. Annable, University of Florida;
Mark Newman, University of Florida;
Jaehyun Cho, University of Florida;
James Jawitz, University of Florida;
PSC Rao, Purdue University

1:50 p.m.
Electrical Resistvity Tracer Teststo Estimate Seepage Velocity In the Biscayne Aquifer, Miami-Dade Ccouty, Florida
June E. Mirecki, Ph.D., PG, U.S. Army Corps of Engineers-Jacksonville District;
John Jansen, Ph.D., PG, ENTRIX;
Brian Barnes, Carno ENTRIX

2:10 p.m.
Assessing Groundwater Flow Velocity at Multiple Measurement Scales
Michaye McMaster, GeoSyntec Consultants;
Gary Wealthall, PhD, Geosyntec Consultants Inc;
Natasha Barros, Geologist, Geosyntec Consultants, Inc.;
Laura Zimmerman, Geosyntec Consultants Inc. ;
P.C. Schillig, University of Kansas;
J.F. Devlin, Ph.D., University of Kansas

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