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Chart 2.1
Contribution to national water yield, total land area and population, by drainage region

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Contribution to national water yield, total land area and population, by drainage region
1.
The water yield estimates are 34-year annual averages (1971 to 2004), with the exception of those estimates for drainage regions 5, 7, 16, 17, 18 and the Labrador portion of 25 which are based on 20 years of data (1975 to 1996); and drainage region 8 which is based on a 23-year annual average (1972-1994) for the Arctic Archipelago (Spence and Burke 2008), and on a 20-year annual average (1975 to 1996) for the remaining area. Data were derived from discharge values contained in Environment Canada, 2010, Water Survey of Canada, Archived Hydrometric Data (HYDAT) (www.wsc.ec.gc.ca/hydat/H2O/index_e.cfm?cname=main_e.cfm).
Source(s):  Spence C., and A. Burke, 2008, "Estimates of Canadian Arctic Archipelago Runoff from Observed Hydrometric Data," Journal of Hydrology, Vol. 362, pages 247 to 259. Statistics Canada, Environment Accounts and Statistics Division, 2010, special tabulation.