Water Supply Outlook for Alberta
July 2008
Table 3b - Water Supply Forecast as of July 1, 2008 - Oldman River Basin
(Natural Flows) |
Volume Forecast for July 1 to September 30, 2008 | Year to date | |||||||
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-June 2008 Volume as a % of Average | Ranking (lowest to highest) | |
St. Mary River | 234,000** | 99 | 77-123 | 66 | 50/91 | 103*** | 53/91 | |
Belly River | 77,700* | 95 | 85-125 | 69 | 42/91 | 94*** | 37/91 | |
Waterton River | 159,000* | 98 | 76-136 | 59 | 49/91 | 109*** | 56/91 | |
Oldman River near Brocket | 228,000* | 89 | 69-123 | 53 | 45/91 | 101*** | 48/91 | |
Oldman River at Lethbridge | 766,000* | 94 | 69-122 | 54 | 46/91 | 101*** | 50/91 |
*NOTE: The forecast shown is the March to September 2008 forecast minus the recorded volume to date Click on the site Location to see the Water Supply Forecast graphically ** - This value is the natural volume and includes the U.S. share *** - Recorded 2008 natural volumes 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. |
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