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TitleCanadian Groundwater Inventory: regional hydrogeological characterization of the south-central part of the Maritimes Basin
AuthorRivard, C; Michaud, Y; Deblonde, C; Boisvert, V; Carrier, C; Morin, R H; Calvert, T; Vigneault, H; Conohan, D; Castonguay, S; Lefebvre, R; Rivera, A; Parent, M
SourceGeological Survey of Canada, Bulletin 589, 2008, 96 pages; 1 CD-ROM,
Alt SeriesNew Brunswick Department of Environment, New Brunswick Environmental Reporting Series
PublisherNatural Resources Canada
Mediapaper; CD-ROM; digital; on-line
RelatedThis publication is related to Rivard, C; Deblonde, C; Michaud, Y; Boisvert, V; Carrier, C; Castonguay, S; Lefebvre, R; (2005). Hydrogeological atlas of the south-central area of the Maritimes Carboniferous basin, Geological Survey of Canada, Open File 4884
File formatpdf (Adobe® Reader® v. 6.0 is included / est fourni)
ProvinceNew Brunswick; Nova Scotia; Prince Edward Island
NTS11E/13; 11L/04; 11L/05; 11L/12SE; 11L/12SW; 21H/14; 21H/15; 21H/16; 21I/01; 21I/02; 21I/03; 21I/06; 21I/07; 21I/08; 21I/09SE; 21I/09SW; 21I/10SE; 21I/10SW; 21I/11SE; 21I/11SW
AreaHarcourt; Bouctouche; Shediac; Moncton; Sallsbury; Petitcodiac; Sackville; Caledonia Mountains; Amherst; Cobequid Mountains; Summerside; Borden
Lat/Long WENS-65.5000 -63.5000 46.6333 45.7500
Subjectshydrogeology; regional geology; stratigraphy; structural geology; surficial geology/geomorphology; geochemistry; mathematical and computational geology; geophysics; groundwater; aquifers; bedrock aquifers; groundwater resources; resource estimation; resource management; regional planning; water utilization; water wells; groundwater regimes; groundwater flow; hydrodynamics; recharge rates; hydraulic analyses; hydraulic conductivity; transmissivity; specific yield; modelling; bedrock geology; structural controls; faults; fractures; sedimentary rocks; hydrostratigraphic units; pump tests; permeability; porosity; water quality; groundwater pollution; salinity; water levels; groundwater levels; piezometric levels; boreholes; geophysical logging; resistivity logging; geophysical surveys; seismic surveys, ground; seismic surveys, marine; water analyses; geochemical analyses; major element analyses; trace metals; trace element analyses; nitrate; acidity; total dissolved solids; hydrologic budget; meteorology; surface waters; stream flow; hydrographs; glacial deposits; tills; till stratigraphy; till samples; grain size analyses; organic deposits; peatlands; soils; soil samples; whole rock analyses; remote sensing; physiography; topography; hydrography; land use; compilation; Maritimes Basin; Appalachian Province; Moncton sub-basin; Marysville sub-basin; Central sub-basin; Sackville sub-basin; Cumberland sub-basin; Magdalen sub-basin; Prince Edward Island Group; Richibucto Formation; Boss Point Formation; Hillsborough Formation; hydraulic properties; groundwater protection; numerical modelling; 2-D models; 3-D models; data integration; data compilation; ground-penetrating radar; slug tests; packer tests; infiltration; groundwater monitoring; specific capacity; hardness; saline intrusions; freshwater-saltwater interface; databases; aquitards; Phanerozoic; Cenozoic; Quaternary; Paleozoic; Permian; Carboniferous; Devonian
Illustrationssketch maps; tables; photographs; logs; cross-sections; time series; stratigraphic charts; geophysical logs; profiles; cross-plots; rose diagrams; stereonets; plots; bar graphs; Box-and-whisker diagrams; hydrographs; block diagrams; pie charts; graphs; schematic representations; ternary diagrams; models; variation diagrams; histograms
ProgramMaritimes Groundwater Initiative
ProgramNew Brunswick Department of Environment and Local Government, Funding Program
ProgramPrince Edward Island Department of Environment, Energy and Forestry, Funding Program
ProgramNova Scotia Environment and Labour, Funding Program
Released2008 04 01
AbstractThe Maritimes Groundwater Initiative (MGWI) is a large, integrated, regional hydrogeological study focusing on a representative area of the Maritimes Basin in eastern Canada. The study area covers a land surface of 10 500 km2, of which 9 400 km2 are underlain by sedimentary rocks. This sedimentary bedrock is composed of a sequence of discontinuous strata of highly variable hydraulic properties, and is generally overlain by a thin layer of glacial till (mostly 4-8 m, but can reach 20mthick). Depending on the area, 46 to 100% of the population relies on groundwater for water supply, either from municipal wells or from private residential wells. The main objectives of this project were to improve the general understanding of groundwater-flow dynamics and to provide baseline information and tools for a regional groundwater-resource assessment. This bulletin presents the current state of understanding of this hydrogeological system, along with the methodology used to characterize and analyze its distinct behaviour at three different scales.
This regional bedrock aquifer system contains confined and unconfined zones, and each of its lenticular permeable strata extends only a few kilometres. Preferential groundwater recharge occurs where sandy till is present. The mean annual recharge rate to the bedrock is estimated to range between 130 and 165 mm/a. Several geological formations of this basin provide good aquifers, with hydraulic conductivity in the range 5 x 10-6 to 10-4 m/s. Based on results of numerical flow modelling, faults were interpreted to have a key role in the regional flow. Pumping-test results revealed that the fractured aquifers can locally be very heterogeneous and anisotropic, but behave similarly to porous media. Work performed at the local scale indicated that most water-producing fractures seem to be subhorizontal and generally oriented in a northeasterly direction, in agreement with regional structures and pumping-test results. Almost all residential wells are shallow (about 20 m) open holes that are cased only through the surficial sediments.