| Titre | Geospatial distribution of chemical, bacteriological and gas parameters in southern Ontario groundwater |
| Télécharger | Téléchargement (publication entière) |
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| Licence | Veuillez noter que la Licence du gouvernement
ouvert - Canada remplace toutes les licences antérieures. |
| Auteur | Colgrove, L M; Hamilton, S M |
| Source | Regional-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 |
| Année | 2019 |
| Séries alt. | Ontario Geological Survey, Open File Report 6349 |
| Éditeur | Ressources naturelles Canada |
| Éditeur | Gouvernement de l'Ontario |
| Réunion | Regional-Scale Groundwater Geoscience in Southern Ontario: Open House; Guelph; CA; février 27-28, 2019 |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/313561 |
| Media | en ligne; numérique |
| Référence reliée | Cette publication est contenue dans Regional-Scale Groundwater Geoscience in Southern Ontario: An Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario Geoscientists Open House |
| Formats | pdf |
| Province | Ontario |
| SNRC | 30; 31B; 31C; 31D; 31E; 31G; 40; 41A; 41G; 41H/03; 41H/04; 41H/05; 41H/06; 41H/12; 41H/13 |
| Région | le sud de l'Ontario; Great Lakes |
| Lat/Long OENS | -84.0000 -74.0000 46.0000 41.5000 |
| Sujets | eau 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 |
| Diffusé | 2019 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. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Volume des résumés pour la Commission géologique de l'Ontario et la commission geologique du Canada géoscience des eaux souterraines de la CGC
portes ouvertes avec conservation Ontario. |
| GEOSCAN ID | 313561 |
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