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TitreGeospatial distribution of chemical, bacteriological and gas parameters in southern Ontario groundwater
TéléchargerTéléchargement (publication entière)
AuteurColgrove, L M; Hamilton, S M
SourceRegional-Scale Groundwater Geoscience in Southern Ontario: An Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario Geoscientists Open House; par Russell, H A J; Ford, D; Holysh, S; Priebe, E H; Commission géologique du Canada, Dossier public 8528, 2019 p. 6, https://doi.org/10.4095/313561 (Accès ouvert)
Année2019
Séries alt.Ontario Geological Survey, Open File Report 6349
ÉditeurRessources naturelles Canada
ÉditeurGouvernement de l'Ontario
RéunionRegional-Scale Groundwater Geoscience in Southern Ontario: Open House; Guelph; CA; février 27-28, 2019
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/313561
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Russell, H A J; Ford, D; Holysh, S; Priebe, E H; (2019). Regional-Scale Groundwater Geoscience in Southern Ontario: An Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario Geoscientists Open House, Commission géologique du Canada, Dossier public 8528
Formatspdf
ProvinceOntario
SNRC30; 31B; 31C; 31D; 31E; 31G; 40; 41A; 41G; 41H/03; 41H/04; 41H/05; 41H/06; 41H/12; 41H/13
Lat/Long OENS -84.0000 -74.0000 46.0000 41.5000
Sujetseau souterraine; aquifères; géochimie des eaux souterraines; ressources en eau souterraine; bactéries; gaz; géologie du substratum rocheux; lithologie; dépôts glaciaires; moraines; sédiments marins; topographie du substratum rocheux; topographie karstique; lithogéochimie; qualité de l'eau; hydrogéologie; géologie de l'environnement; géologie régional; géologie des dépôts meubles/géomorphologie; géochimie; Phanérozoïque; Cénozoïque; Quaternaire; Paléozoïque
Diffusé2019 02 08
Résumé(disponible en anglais seulement)
Groundwater Resources Study 17 is a recent publication by the Ontario Geological Survey that delineates wide regions in southern Ontario wherein individual chemical constituents are elevated in groundwater including arsenic, barium, boron, fluoride, nuisance gases (methane, hydrogen sulphide, hypoxic gas), iodide, nitrate, chloride, selenium and uranium. With several exceptions, these regions are explainable as combinations of the natural influence of (1) bedrock lithology, (2) marine sediments, (3) glacial sediment thickness and (4) bedrock topography. Marine influence, particularly in eastern Ontario, is apparent in the distribution of chloride, sodium, iodine, boron, selenium and methane. Drift thickness and/or bedrock topography influences the distribution of chloride, selenium, methane, barium and to a lesser extent, iodine. Bedrock lithogeochemistry controls, or partly controls, the distribution of arsenic, selenium, barium, uranium and chloride.
Shales and carbonate rocks of Devonian age host groundwater that is almost universally elevated in fluoride, making this the only constituent that is spatially related to the age of the host formations. Nitrate is one of several mapped parameters that shows human influence in its distribution; which combines with the influences of coarse grained glacial sedimentary cover and karst in bedrock. The spatial incidence of fecal and total coliform bacteria is also discussed in GRS 17. The occurrence of karst appears to an overwhelming factor in the distribution of coliform bacteria in bedrock. Another anthropogenic influence is chloride from road salting, which has a widespread but intermittent distribution. It can be easily differentiated from natural chloride by comparing molar ratios against those for bromide. The data used to generate the polygons in GRS-17 were derived from the OGS Ambient Groundwater Geochemistry database.
GEOSCAN ID313561