Water Security Agency Anticipating Higher Water Levels From Alberta Rainfall
June 20, 2013 -- The Water Security Agency is advising the public of a potential rise in Lake Diefenbaker and the South Saskatchewan River due to heavy rainfall forecasted in Alberta.
A large rainfall is currently forecasted for southwestern Alberta and the foothills, with as much as 150 mm possible in certain areas. If the forecasted rainfall occurs, the Water Security Agency is estimating the South Saskatchewan River into Lake Diefenbaker will rise approximately 2-3 metres beginning over the weekend and continuing into next week. With the higher inflows, Lake Diefenbaker will also rise more quickly.
In anticipation of the rainfall occurring and potential for higher flows, the Water Security Agency is proactively increasing outflows from Lake Diefenbaker to reduce the water level of the reservoir. These outflows will remain within the channel capacity and should not cause any out-of-bank flooding.
As a result of the increased releases, the South Saskatchewan River below Lake Diefenbaker could increase from 400 m3/s to around 800-900 m3/s. This will result in a rise on the river of around 1.5 metres and increased river velocity.
The Water Security Agency continues the monitor the situation and will issue updates as needed.
For more information, contact:
Water Security Agency