Water Supply Outlook for Alberta

November 2017

Recorded March 1 to September 30, 2017 Natural Runoff Volumes - Oldman River Basin (Natural Flows)

2017 Recorded Volumes
March 1 to September 30 		2017 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 757,000** 113 57/99 10%
Belly River 227,000* 98 38/99 13%
Waterton River 626,000* 117 59/99 8%
Oldman River near Brocket 1,003,000* 102 46/99 11%
Oldman River at Lethbridge 2,502,000* 89 32/99 19%

* - Recorded 2017 natural volumes are preliminary and subject to change
** - This value is the natural volume and includes the U.S. share

Average is based on the period 1981 to 2009

Ranking is based on the period 1912 to 2009

For technical enquires about this web page please contact Alberta Environment - Environmental Management Water Management Operations Branch at AENV-WebWS@gov.ab.ca