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TitleGroundwater resources of the Lachine-Saint-Jean area, Quebec (south of St. Lawrence River), 31 H/5 (part of) and 31 H/6 W1/2
AuthorFreeze, R A
SourceGeological Survey of Canada, Bulletin 112, 1964, 19 pages (2 sheets),
PublisherGeological Survey of Canada
Mediapaper; on-line; digital
RelatedThis publication is a translation of Freeze, R A; (1964). Hydrogéologie de la région de Lachine-St-Jean, Québec (au sud du St-Laurent), partie des cartes 31H/5 et 31H/6, moitié ouest, Geological Survey of Canada, Bulletin no. 112
File formatpdf
NTS31H/05; 31H/06
AreaLachine; Saint-Jean
Lat/Long WENS -74.0000 -73.0000 45.5000 45.0000
Lat/Long WENS -73.5000 -73.5000 45.3750 45.0000
Subjectshydrogeology; general geology; surficial geology/geomorphology; groundwater; groundwater resources; aquifers; piezometric levels; precipitation; run-off; water analyses; bedrock geology; hydrologic environment; groundwater geochemistry; groundwater discharge; groundwater regimes; groundwater flow; water quality; iron; salt; hydrogen sulphide; water table; evapotranspiration; Phanerozoic; Cenozoic; Quaternary; Paleozoic; Ordovician; Cambrian
Illustrationstables; schematic cross-sections; ternary diagrams; sketch maps
Released1964 01 01; 2015 11 09
AbstractSufficient groundwater or suitable quality exists throughout the Lachine-Saint-Jean area to supply the domestic agricultural and industrial needs of the present population. There is approximately 5 inches of groundwater recharge each year, giving rise to a basin-wide safe yield of 140 gallons per minute per square mile. Salt, hydrogen sulphide, and excessive iron occur in the water in localized areas, but for the most part water quality is good. Hardness, total dissolved solids, and the nature of the major chemical constituents can be correlated with the source aquifer. Alluvial, glacio-fluvial and buried valley deposits constitute excellent sand and gravel aquifers, which are too often over looked in the location of high-capacity wells. The bedrock can be divided into three aquifers, which in order of decreasing transmissibility are: (a) Sandstone, (b) Carbonate, and (c) Shale aquifer. The groundwater occurs under artesian head and is probably part of an unconfined artesian system. Groundwater flow is toward and into the St. Lawrence River and its tributaries.