Water Supply Outlook for Alberta

November 2010

Recorded March 1 to September 30, 2010 Natural Runoff Volumes - Oldman River Basin (Natural Flows)

2010 Recorded Volumes
March 1 to September 30
2010 Forecast Volumes
Locations Volume in dam3 Volume as a
% of Average
Ranking (lowest to highest) Average difference between Forecast and Recorded natural volumes
St. Mary River 922,000** 124 73/91 32%
Belly River 266,000* 109 63/91 19%
Waterton River 517,000* 85 25/91 4%
Oldman River near Brocket 1,022,000* 94 41/91 9%
Oldman River at Lethbridge 3,389,000* 114 64/91 29%

* - Recorded 2010 natural volumes are preliminary and subject to change
** - This value is the natural volume and includes the U.S. share

Average and rankings are based on the period 1912 to 2001


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