Open Government Portal

As we launch this enhanced integrated Open Government Portal search, you may notice that there has been a reduction in the number of open information records. Please note that you can still access the publications that no longer appear here by visiting: Government of Canada Publications and Library and Archives Canada. If you have any comments or questions contact us!

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34 records found
  • Air temperature measurement network

    The map shows the location of the air temperature measurement stations. Fragmentary meteorological reports were prepared and published by European explorers in the North American Arctic during the late 16th and 17th centuries. Many employees of the Hudson's Bay Company kept careful observations...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Water quality of surface waters

    The plate contains four maps showing the Hardness of Surface Water, Total Dissolved Solids of Surface Waters, Turbidity of Surface Waters and the Chemical Quality of Typical Surface Waters of Canada. These water quality maps were based on data collected from 1970 and 1971 at national river...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Mean January daily temperature

    The map shows the mean January daily temperature based on the 30-year period 1941-1970. The lowest mean January daily temperatures are below -35 degrees Celsius and are located on Ellesmere Island and on Axel Heiberg Island and south of the Boothia Peninsula in Nunavut. The highest mean January...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Depth, duration, and frequency of point rainfall - 10-minute rainfall for 2-y...

    The plate contains four maps of 10 minute rainfalls (in millimetres) for a 2 year return period, a 5 year return period, a 10 year return period and a 25 year return period. Each map has a detailed inset of the Vancouver area. These four maps were not analyzed for the mountainous parts of Canada...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Precipitation networks

    The Atmospheric Environment Service has no network density limitations for stations reporting precipitation. As general guidance it is suggested that gauge separations should be about 15 miles (24 kilometres) in rural areas; a higher density is desirable in more heavily populated areas, and in...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Annual snowfall

    The map shows the annual snowfall (in centimetres) based on the 30-year period 1941-1970. Snowfall is measured by inserting a ruler into the new snow at several points to obtain its depth and to estimate the degree of drifting or scouring that has occurred. The water equivalent of snowfall for...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Surficial hydrogeology

    The map shows the quantity and quality of groundwater. The quality is the total dissolved solids in parts per million. The quantity is expressed in litres per second. During the Pleistocene epoch Canada was almost entirely covered by glaciers. Hence, although there are extensive and...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Suspended sediment concentration

    The map shows the concentration (annual load) of suspended sediments into rivers (in milligrams per litre). The load of sediment is lower in the Canadian Shield area and on the Arctic Islands. The greatest loads appear in the Prairie Provinces and in the Cordillera. The map also shows histograms...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Depth, duration and frequency of point rainfall - 24-hour rainfall for 2-year...

    The plate contains four maps of 24 hour rainfalls (in millimetres) for a 2 year return period, a 5 year return period, a 10 year return period and a 25 year return period. Each map has a detailed inset of the Vancouver area. These four maps were not analyzed for the mountainous parts of Canada in...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Variation of monthly river flows

    The plate shows a graph of the maximum and minimum monthly mean flow and mean monthly river flow for 36 selected river gauging stations. Thirty-six gauging stations across Canada were selected to represent a cross section of river types and sizes. Most of the rivers are natural flow; however,...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
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