Water Supply Outlook for Alberta
April 2004
Table 3a - Water Supply Forecast as of April 1, 2004 - Oldman River Basin
(Natural Flows) |
Volume Forecast for March 1 to September 30, 2004 | ||||||
Locations | Volume in dam3 | Volume as a % of Average | Probable Range as a % of Average | Reasonable Minimum as % of Average | Forecast Ranking (lowest to highest) | Recorded March-September 2003 Volume as a % of Average |
St. Mary River | 550,000* | 75 | 58-112 | 47 | 19/91 | 71 |
Belly River | 181,000 | 74 | 66-105 | 56 | 13/91 | 81 |
Waterton River | 452,000 | 75 | 59-108 | 49 | 19/91 | 63 |
Oldman River near Brocket | 825,000 | 76 | 60-120 | 46 | 23/91 | 70 |
Oldman River at Lethbridge | 2,078,000 | 70 | 54-109 | 43 | 18/91 | 64 |
Note: Click on the site Location to see the Water Supply Forecast graphically * - This value is the natural volume and includes the U.S. share 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