Environmental Thematic Maps and Graphics:
Average annual water yield per area, by ecoprovince, 1971 to 2014

The title of this map is “Average annual water yield per area, by ecoprovince, 1971 to 2014.” This map provides a visual representation of the average annual water yield in Canada.

On the page, there is one large map of Canada, a legend to the upper right and a scale bar below. The map delineates ecoprovinces with a thin black boundary line and ecoprovinces are labeled with a code. Fine black dashed lines show provincial and territorial boundaries. Below the map, ecoprovince codes and their corresponding names are listed for reference.

The map shows average annual water yield symbolized by different shades of blue. The lowest water yield is shown as light blue, while the highest water yield is shown as deep blue.

The unit of measurement is millimetres (mm). The legend contains five categories: 1,147 to 2,308 (dark blue), 517 to less than 1,147 (blue), 200 to less than 517 (light blue), 0 to less than 200 (pale light blue), and data suppressed (grey).

The map shows that the average annual water yield is higher on the coasts, and lower in the interior of the country. Data has been suppressed in most of the far north.

Notes: Water yield is an estimate of freshwater runoff. Data were suppressed at the ecoprovince level for the North.

Sources:
Statistics Canada, Environment and Energy Statistics Division, 2021, Table 38-10-0091-01, https://www150.statcan.gc.ca/t1/tbl1/en/tv.action?pid=3810009101 (accessed December 17, 2020);
Spence, C. and A. Burke, 2008, “Estimates of Canadian Arctic Archipelago runoff from observed hydrometric data,” Journal of Hydrology, Vol. 362, pp. 247-259.