Water Supply Outlook for Alberta
April 2013
| Water Supply Forecast as of April 1, 2013 - Oldman River Basin
(Natural Flows) |
| Volume Forecast for April 1 to September 30, 2013 | 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 2013 Volume as a % of Average | Ranking (lowest to highest) | |
| St. Mary River | 584,000** | 90 | 82-106 | 74 | 27/99 | 86*** | 53/99 | |
| Belly River | 221,000* | 97 | 90-110 | 82 | 37/99 | 75*** | 53/99 | |
| Waterton River | 566,000* | 107 | 95-122 | 85 | 48/99 | 88*** | 53/99 | |
| Oldman River near Brocket | 898,000* | 95 | 82-107 | 71 | 36/99 | 91*** | 61/99 | |
| Oldman River at Lethbridge | 2,770,000* | 102 | 91-114 | 81 | 53/99 | 89*** | 52/99 | |
|
*NOTE: The forecast shown is the March to September 2013 forecast minus the recorded volume to date ** - This value is the natural volume and includes the U.S. share*** - Recorded 2013 natural volumes are preliminary and subject to change Average is calculated for the March 1 to September 30 period 1981 to 2009 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
