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9 records found
  • Federal

    Current Water Levels, 2008

    The map shows 3172 hydrometric stations, 1491 active and 1681 inactive, located on rivers and lakes across the country. All the stations on the map are situated in a drainage area of 200 square kilometres or more. For 1200 stations shown on the map, surface water level measurements are recorded...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JP2
    • ZIP
    • other
  • Federal

    The hydrologic cycle

    Hydrology is the science concerned with the occurrence and distribution of water on and under the earth. Meteorology is the science dealing with the atmosphere and the movement of water, both as vapour and as liquid, in the air. Both sciences are concerned with the hydrologic cycle - the...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Humidity and Fog

    Contained within the 3rd Edition (1957) of the Atlas of Canada is six maps that show the humidity and fog occurrences across Canada. Two maps on the top that show the mean mixing ratios for January and July, respectively. Mixing ratio is defined as the ratio of the mass of the water vapor to the...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Ice

    Contained within the 4th Edition (1974) of the Atlas of Canada is a set of six maps that shows different types of ice accumulation.
    Organization:
    Natural Resources Canada
    Resource Formats:
    • PDF
    • JPG
  • Federal

    Mean Annual Total Precipitation

    Contained within the 3rd Edition (1957) of the Atlas of Canada is a plate that shows two maps for the annual total precipitation. Annual precipitation is defined as the sum of rainfall and the assumed water equivalent of snowfall for a given year. A specific gravity of 0.1 for freshly fallen snow...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    The Potential of Soils and Bedrock to Reduce the Acidity of Atmospheric Depos...

    Contained within the 5th Edition (1978 to 1995) of the National Atlas of Canada is a map that shows vulnerability of soils and bedrock to acid precipitation using low, moderate and high sensitivity classes. The table covers sensitivity of water areas and the small map shows pattern of sulphate...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Potential Evapotranspiration

    Contained within the 4th Edition (1974) of the Atlas of Canada is a set of three maps relating the effects and dependency of vegetation on environmental variables. One map shows the average annual potential evapotranspiration in inches from ground and plant surfaces for areas where there is a...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • PDF
    • JPG
  • Federal

    Origins of the People, 1901 Maritime Provinces and Quebec, Ontario and Quebec

    Contained within the 1st Edition (1906) of the Atlas of Canada is a plate that shows two maps. The first map that shows origins of the people in Maritime provinces and Eastern Quebec, circa 1901. The second map that shows origins of the people in Quebec and Ontario, circa 1901.A varying number of...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Origins of the People, 1901 Manitoba and Saskatchewan, British Columbia and A...

    Contained within the 1st Edition (1906) of the Atlas of Canada is a plate map that shows 2 maps. The first map shows the origins of the people in British Columbia and Alberta, circa 1901. The second map shows the origins of the people in Manitoba and Saskatchewan. A varying number of ethnic...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
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