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TitleUsing borehole flowmeter data to optimize hydraulic conductivity characterization in heterogeneous unconsolidated aquifers
AuthorParadis, D; Lefebvre, R; Morin, R H; Gloaguen, E
SourceProceedings of GeoHalifax 2009; 2009 p. 1-8
Alt SeriesEarth Sciences Sector, Contribution Series 20090090
MeetingGeoHalifax2009: 62nd Canadian Geotechnical Conference & 10th Joint CGS/IAH-CNC Groundwater Conference; Halifax; CA; September 20-24, 2009
Subjectshydrogeology; groundwater; groundwater circulation; groundwater flow; groundwater regimes; aquifers; hydraulic conductivity; hydrostratigraphic units
Illustrationsplots; profiles; tables; diagrams
ProgramGroundwater Mapping Program
AbstractBorehole flowmeter measurements obtained during pumping can be effective in determining profiles of hydraulic conductivity (K). Few tests have been reported on flowmeter in full-screened wells that penetrate unconsolidated aquifers. In this paper, we demonstrate the utility of the flowmeter technique in quantifying the spatial variability of K and in distinguishing hydrofacies in an unconsolidated heterogeneous aquifer that exhibits low to moderate K. Results indicate that: (1) comparison of K values obtained from flowmeter measurements and multilevel slug tests shows differences consistently below 10%, and (2) individual hydrofacies can be delineated based upon K contrasts.