Geological Society of America

8 Karst Studies across the Midcontinent

Monday, 19 April 2021
8:00 AM - 12:00 PM
Geosciences @ University of Arkansas Room

SINGLE-WELL INJECTION-DRIFT TEST TO CHARACTERIZE GROUNDWATER VELOCITY AND DISPERSIVITY

Paper number: 8-2
Program: Theme Sessions
Time: 8:05 AM – 8:25 AM

Authors

Charles Paradis Presenting Author
University of Wisconsin-Milwaukee, Milwaukee, WI
Cullen Meurer
University of Wisconsin-Milwaukee, Milwaukee, WI
Jiyan Hatami
University of Wisconsin-Milwaukee, Milwaukee, WI
Kendyl Hoss
University of Wisconsin-Milwaukee, Milwaukee, WI
Rakiba Sultana
University of Wisconsin-Milwaukee, Milwaukee, WI
Aaron Tigar
Grand Junction, CO
Raymond Johnson
Grand Junction, CO

Abstract

A method to characterize the magnitude of groundwater velocity and longitudinal dispersivity based on a single-well injection-drift test will be presented. The method utilizes the transport data (concentration versus time) of a non-reactive groundwater tracer during its forced-gradient injection into a single well followed by its natural-gradient drift back through the same well. The method then utilizes a transport model (implicit finite difference) to fit the single-well transport data for the magnitude of groundwater velocity and longitudinal dispersity. The single-well model fits of velocity and dispersivity will be compared to those calculated from the transport data in down-gradient multi-well transects of observation wells. The method presented here is relatively simple, rapid, and cost-effective because it utilizes a single-well, as opposed to multiple wells, to characterize two fundamental physical transport parameters; groundwater velocity and longitudinal dispersivity.

Geological Society of America Abstracts with Programs. Vol. 53, No. 3

doi: 10.1130/abs/2021NC-362716

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