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TitleA unified hydrogeological framework for southern Ontario: A progress report on surficial geological stratigraphy
AuthorSharpe, D RORCID logo; Bajc, A F; Hinton, M JORCID logo; Russell, H A JORCID logo
SourceGAC-MAC 2017, abstracts/GAC-MAC 2017, résumés; Geological Association of Canada-Mineralogical Association of Canada, Joint Annual Meeting, Abstracts Volume vol. 40, 2017 p. 344 Open Access
logo Open Access
LinksOnline - En ligne (complete volume, PDF, 3.09 MB)
Alt SeriesNatural Resources Canada, Contribution Series 20200337
PublisherGeological Association of Canada
MeetingGAC-MAC 2017: Geological Association of Canada-Mineralogical Association of Canada Annual Meeting; Kingston, ON; CA; May 14-18, 2017
Mediaon-line; digital
File formatpdf
Subjectshydrogeology; surficial geology/geomorphology; stratigraphy; Nature and Environment; Science and Technology; groundwater resources; aquifers; hydrostratigraphic units
ProgramGroundwater Geoscience Aquifer Assessment & support to mapping
Released2017 05 01
AbstractOntario implemented the Clean Water Act in 2006 and embarked upon a ten year Source Water Protection (SWP) program that invested ~250 million dollars to establish a framework to protect municipal water supply. Groundwater studies were conducted at several scales from the well-head protection zone of a municipal well to watershed characterization reports of a source protection region. There has been little attempt; however, to integrate these results into a Southern Ontario scale geologic or hydrogeologic framework. As such, these studies can be considered to be under-utilized regional hydrogeological assets which could contribute to a broader understanding of regional hydrostratigraphy and hydrogeology. For example, relating municipal wells to a geological understanding could support improved characterization of aquifer geometry, architecture and hydrogeologic properties. More broadly, there continues to be an opportunity to integrate not only SWP information but data from Permits to Take Water and the Provincial Groundwater Monitoring Network (PGMN) into a more comprehensive, standardized, regional hydrostratigraphic framework.
This presentation is a status report on a geological co-ordination activity that will preview selected areas of the hydrostratigraphic framework. In particular, we highlight geological model development to support an improved framework and analysis of the related hydrogeological datasets. Work is advancing on the capture of high-quality control datasets such as measured field sections, borehole records and hydrostratigraphic classification. All Ontario Geological Survey 3D models have been integrated in a single model environment along with the regional Oak Ridges Moraine model. Progress has been initiated on the hydrostratigraphic classification of wells in the PGMN with an initial focus on wells screened in surficial deposits, and located in areas of controlled 3D geological models and areas with abundant high-quality datasets. Progress has also been made on mining SWP program data for municipal well fields. Current data mining is focused on relating municipal well data to defined aquifers.
Geological models that can be used to support the above hydrogeological frameworks are now available for portions of the GTA including, at variable scales, ORM, Simcoe County and the Yonge Street aquifers. We preview these steps to the eventual development of a regional conceptual 3D hydrogeological model for southern Ontario.
Summary(Plain Language Summary, not published)
Abstract on reclassification and stratigraphic classification of Provincial Groundwater Monitoring Network and Municipal wells.

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