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TitleInvestigation of the Potsdam Group sandstone aquifer vulnerability with the DFN-M approach
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AuthorPehme, P; Parker, B; Sterling, S; Crow, H; Chapman, S; Kearney, M
SourceRegional-scale groundwater geoscience in southern Ontario: an Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario geoscientists open house; by Russell, H A J; Ford, D; Priebe, E H; Holysh, S; Geological Survey of Canada, Open File 8363, 2018 p. 31, https://doi.org/10.4095/306559
Year2018
PublisherNatural Resources Canada
MeetingRegional-Scale Groundwater Geoscience in Southern Ontario: Open House; Guelph; CA; February 28 - March 1, 2018
Documentopen file
Lang.English
Mediaon-line; digital
RelatedThis publication is contained in Russell, H A J; Ford, D; Priebe, E H; Holysh, S; (2018). Regional-scale groundwater geoscience in southern Ontario: an Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario geoscientists open house, Geological Survey of Canada, Open File 8363
File formatpdf
ProvinceOntario
NTS31G/05
AreaGreely; Ottawa
Lat/Long WENS -76.0000 -75.5000 45.5000 45.2500
Subjectshydrogeology; geochemistry; geophysics; groundwater; aquifers; groundwater geochemistry; groundwater resources; groundwater pollution; water quality; bedrock geology; lithology; sedimentary rocks; sandstones; structural features; fractures; urban geology; boreholes; core samples; water wells; geophysical logging; source rocks; Potsdam Group; Nepean Sandstone; water use; agriculture; water supply; source water protection; groundwater-surface water interaction; Phanerozoic; Cenozoic; Quaternary; Paleozoic; Ordovician; Cambrian
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Location
 
Natural Resources Canada Library - Ottawa (Earth Sciences)
 
ProgramAquifer Assessment & support to mapping, Groundwater Geoscience
Released2018 02 16
AbstractAs cities grow, surrounding rural communities often experience development stresses such as increased demand on local aquifers. Rural aquifers can have different threats than city centres, such as nitrates from agriculture or pathogens related to septic systems that may not have historically been a dominant concern, but become so under the increased water demands. Case in point is the growing community of Greely, near Ottawa, Ontario which is surrounded by agricultural lands, homes have individual septic systems, and a shallow bedrock aquifer provides the sole water supply from a communal well. The City of Ottawa has engaged the project team to examine the deeper Nepean sandstone as an alternative water supply. An initial borehole was continuously cored through the Paleozoic bedrock sequence into the Precambrian close to the existing pumping well. The detailed Discrete Fracture Network - Matrix (DFN-M) approach was applied including rock core logging, chemical analysis, geophysical logging, hydrogeologic and hydro-geophysical testing, with cross-hole testing pending. We present the study approach, preliminary results and future plans. In addition to dealing with Greely's challenges, the multiple high-resolution data sets provide insight into this complex geologic/hydrogeologic setting and an initial assessment of the sandstone's viability as a water supply elsewhere.
GEOSCAN ID306559