HR: 0830h
AN: H21E-0894    [PDF]
TI: Factors Influencing Groundwater Monitoring Strategies in a System With an Unconfined Aquifer Overlying a Fractured Bedrock Aquifer
AU: * Chen, Y
EM: ychen@eos.ubc.ca
AF: Department of Earth and Ocean Sciences, The University of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4 Canada
AU: Smith, L
EM: lsmith@eos.ubc.ca
AF: Department of Earth and Ocean Sciences, The University of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4 Canada
AU: Beckie, R
EM: rbeckie@eos.ubc.ca
AF: Department of Earth and Ocean Sciences, The University of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4 Canada
AB: Factors influencing groundwater monitoring strategies are examined for the case where an unconfined aquifer overlies a fractured bedrock aquifer. A contaminant source is located at the ground surface. Flow and transport in the bedrock aquifer is represented as a three-dimensional discrete fracture network within a permeable rock matrix. Using this scenario, we examine how various factors interact to determine plume geometry, and contaminant detection thresholds in the unconfined and bedrock aquifers as a function of well location within the subsurface. Factors considered include the hydrologic properties of the unconfined aquifer (hydraulic conductivity, porosity), the geometric properties of the fractured network (density, length, aperture), and matrix permeability. These simulation results provide guidelines for the design and evaluation of a subsurface monitoring network.
DE: 1829 Groundwater hydrology
DE: 1831 Groundwater quality
DE: 1832 Groundwater transport
SC: Hydrology [H]
MN: 2003 Fall Meeting