Regional hydrogeology of Illusion and Spider Lake area
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Issue Date
2019-04-11
Authors
Dean, Nicole
McIntyre, Mirjana
Rossetto, Cameron
Schluessel, Kurt
Stearn, Michael
License
Subject
Abstract
In British Columbia, many aquifers occur in
unconsolidated sediments prone to contamination and over-extraction.
In the Nanaimo Lowlands, understanding of
subsurface sediments is regionally constrained by the local
stratigraphy, but at the local scale, the subsurface sedimentary
architecture controlling groundwater flow often remains
unclear. The primary aim of this project is to develop a
hydrostratigraphic framework focused on identifying aquifers
and aquitards for the area around Spider Lake, BC. Four
cross-sections were developed based on government well
record data on iMapBC, and are oriented in the NE-SW and
NW-SE directions. Hydrostratigraphic units were constructed
through interpretation of this data and the results were then
standardized based on existing lithostratigraphic records.
TopoDrive was used to determine groundwater flow paths
and the DRASTIC method was then applied to assess
contaminant vulnerability of each unique aquifer. From the
gathered information we determined the location of aquifers
and aquitards as well as the region’s vulnerability to
contaminants.
Description
Poster