Water Supply Outlook for Alberta

August 2010

Water Supply Forecast as of August 1, 2010 - North Saskatchewan River Basin (Natural Flows)

Volume Forecast for August 1 to September 30, 2010 Year to date
Locations Volume in dam3 Volume as a % of Average Probable Range as a % of Average Potential Minimum
as % of
Forecast Ranking (lowest to highest) Recorded March-July 2010 Volume as a % of Average Ranking (lowest to highest)
Lake Abraham Inflow 664,000* 88 82-93 71 12/43** 77**** 4/30
Brazeau Reservoir Inflow 290,000* 75 65-92 57 11/44*** 85**** 10/41
North Saskatchewan River at Edmonton 1,488,000* 86 75-99 69 32/91 81**** 24/91

*NOTE: The forecast shown is the March to September 2010 forecast minus the recorded volume to date

** Lake Abraham is compared to 30 years of data
*** Brazeau Reservoir is compared to 41 years of data

**** Recorded 2010 natural flows are preliminary and subject to change

Average is calculated for the period 1912 to 2001

NOTE: There is: a 50% chance that the actual natural flow will fall within the probable range given; a 25% chance that the actual flow will be less than the lower bound of the probable range given; and a 10% chance that the actual natural flow will be less than the reasonable minimum. Actual day to day streamflow conditions may vary throughout the season as a result of the effects of streamflow diversion and reservoir storage.

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