Geoscience Reference
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Clair River between Lakes Huron and Saint Clair. The region is boundary
to Lake Huron and to the west by the Saint Clair River. Numerous chemical
and petrochemical companies operate in this region and the wastes gener-
ated by these facilities have historically been managed using near surface
burial and deep well injection. Sporadic discharge of formation fluids, and
possibly industrial waste, to the surface has caused concern over the con-
tamination of Lake Huron, the Saint Clair River, and the regional aquifer
that serves as a water supply for rural Lambton County. Migration of wastes
injected at depth to the near surface via discontinuities in the confining
strata and abandoned deep wells is a plausible mechanism for the contami-
nation of surface and subsurface waters. The numerical models are used to
determine rates and directions of groundwater flow for contamination trans-
port studies, predict the impact of varying climatic conditions and ground-
water consumption, guide sampling programs for natural and anthropogenic
contamination, and determine groundwater discharge to surface water bod-
ies. The geology and hydrogeology of the site are described earlier. 1 , 8 The
groundwater is obtained from sand and gravel deposits at depths below
60 m. The aquifer is called as Freshwater Aquifer that is floating on top of
high saline water due to density difference. Flow in this aquifer is likely be
strongly influenced by precipitation events and results in either discharge
to shallow ditches, creeks, and rivers of recharge to the deeper formations.
The application of the numerical explained earlier. 8 Figure 4 shows the
computed hydraulic head map which best approximates the observed water
Fig. 4. Simulated hydraulic head map of the buried valley, and groundwater seepage
locations in Saint Clair River, Canada, and USA boundary. 1 , 8
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