Water Supply Outlook for Alberta
April 2015
| Water Supply Forecast as of April 1, 2015 - Oldman River Basin
(Natural Flows) |
| Volume Forecast for April 1 to September 30, 2015 | 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 2015 Volume as a % of Average | Ranking (lowest to highest) | |
| St. Mary River | 543,000** | 84 | 75-99 | 67 | 21/99 | 289*** | 98/99 | |
| Belly River | 211,000* | 94 | 85-105 | 78 | 33/99 | 293*** | 99/99 | |
| Waterton River | 459,000* | 87 | 75-103 | 65 | 23/99 | 257*** | 97/99 | |
| Oldman River near Brocket | 795,000* | 84 | 73-108 | 62 | 26/99 | 323*** | 99/99 | |
| Oldman River at Lethbridge | 2,227,000* | 82 | 71-94 | 61 | 28/99 | 217*** | 91/99 | |
|
*NOTE: The forecast shown is the March to September 2015 forecast minus the recorded volume to date ** - This value is the natural volume and includes the U.S. share*** - Recorded 2015 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
