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11 records found
  • 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
  • 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
  • Streamflow gauging stations

    The map shows the location and the number of years of recorded data for the Water Survey of Canada streamflow gauging stations and the Quebec Department of Natural Resources stations. Almost 9 per cent of all the world's river water which flows to the oceans has its source within Canada's...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • 1Freeze-up and break-up of rivers and lakes

    The plate contains four maps showing the mean river freeze-over date, the mean lake freeze-over date, the mean river ice-free date and the mean lake ice free date. The four maps depict, in a general way, the average dates on which freshwater bodies in Canada become completely ice-covered in the...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Influence of glaciers on streamflow

    The map shows the location of glaciers and ice caps and also indicates the rivers and the lakes, which are fed by a glacier (or an ice cap) meltwater. The purpose of this plate is to identify those streams which are fed by glacier meltwaters. Because of the scale of the map, many minor glaciers...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • 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
  • 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
  • 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
  • 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
  • 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
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