Water Supply Outlook for Alberta
August 2003
Table 3b - Water Supply Forecast as of August 1, 2003 - Oldman River Basin
(Natural Flows) |
Volume Forecast for August 1 to September 30 | 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-July 2003 Volume as a % of Average | Ranking (lowest to highest) | |
St. Mary River | 67,800** | 68 | 61-98 | 50 | 13/85 | 76*** | 16/85 | |
Belly River | 28,500* | 79 | 75-107 | 70 | 23/85 | 85*** | 24/85 | |
Waterton River | 38,600* | 56 | 50-87 | 37 | 11/85 | 67*** | 13/85 | |
Oldman River near Brocket | 72,200* | 65 | 61-103 | 52 | 23/85 | 76*** | 21/85 | |
Oldman River at Lethbridge | 214,000* | 64 | 56-99 | 47 | 18/85 | 70*** | 18/85 |
*NOTE: The forecast shown is the March to September 2003 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 Average is calculated for the period 1912 to 1995 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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