# name
Geospatial distribution of chemical, bacteriological and gas parameters in southern Ontario groundwater

# metadata.dc.description[].value
Volume of abstracts for Ontario Geological Survey and Geological Survey of Canada groundwater geoscience Open house with Conservation Ontario.

# metadata.dc.description[].value
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.

# metadata.dc.description.abstract[].value
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. Bedrocklithogeochemistry 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; whichcombines 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 OGSAmbient Groundwater Geochemistry database.

# metadata.dc.relation.ispartof[].value
Regional-Scale Groundwater Geoscience in Southern Ontario: An Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario Geoscientists Open House

# metadata.dc.relation.ispartof[].value
Regional-Scale Groundwater Geoscience in Southern Ontario: An Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario Geoscientists Open House

# metadata.dc.title[].value
Geospatial distribution of chemical, bacteriological and gas parameters in southern Ontario groundwater

# metadata.nrcan.meeting.name[].value
Regional-Scale Groundwater Geoscience in Southern Ontario: Open House

# metadata.nrcan.monographic.title[].value
Regional-Scale Groundwater Geoscience in Southern Ontario: An Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario Geoscientists Open House