Watershed Conditions Statements

(WCS-LW - 1/2021) June 8, 2021 — Due to below average rainfall over the last three months, conditions in the Rideau Valley Watershed now meet the threshold for Minor Low Water status under the Ontario Low Water Response Program.  Watershed residents and businesses are encouraged to conserve water by limiting non-essential uses (e.g., lawn watering, car washing, etc.), for an overall consumption reduction of about 10 percent. Residents are also encouraged to consult with their municipalities regarding any water conservation bylaws that may be in effect. Stream flow values are lower than normal by as much as 20 to 30 percent and field observations…
Water Conditions Statement: Flood Outlook — Lower Ottawa River March 26, 2021 — A Flood Outlook Statement is being issued for areas along the Lower Ottawa River. Based on current snow cover and weather forecast, it is anticipated that levels and flows along the main stem of the river from Arnprior to Hawkesbury are expected to begin to rise over the next few days but will remain within the normal range of fluctuations associated with the spring freshet period. Presently, the snow cover varies significantly across the 146,300 square kilometre Ottawa River basin, with some areas in the south of the…
March 25, 2021­ - Above normal temperatures in March have melted most of the snow across the Rideau Valley watershed. The snow melt was quite rapid at first causing water levels and flows to rise quickly in some areas. This was followed by a more gradual melt of the remaining snow. For the most part, water levels and flows are about normal for this time of year and are well below flood thresholds.     The short-term forecast is calling for rainfall amounts of between 40 to 50 millimetres between Thursday and Sunday, with heaviest rain on Friday, and cooler temperatures…
WCS – R03/2021 March 8, 2021 –The winter of 2020-21 is quickly coming to an end. After a mild start, February brought cooler temperatures. The watershed saw a significant rain event in late December, followed by below normal precipitation in January and above normal precipitation in February. Current conditions recorded at several RVCA and Parks Canada snow course sites are indicating normal water content amounts in the snow for this time of year. In general, water levels on lakes and flows in the streams are presently below normal for this time of year. The current short-term weather forecast indicates a…
WCS - R02/2021 January 29, 2021 – Environment Canada is forecasting very cold weather beginning today and continuing into Sunday before returning to normal range on Monday. This includes night-time wind chill temperatures in the range of -20 to -30 degrees Celsius. In areas where there is a lack of ice cover along with turbulent flow, these cold temperatures can trigger the formation of frazil ice which can accumulate quickly on bridge abutments, piers and riverbanks resulting in increased water levels and flooding in low-lying areas. The small rivers and streams with open water, such as the Tay River, are…
WCS – R01/2021) January 13, 2021 – Environment Canada is forecasting mild temperatures for the remainder of this week, with daily temperatures above zero each day and some rain expected on Friday and Saturday. This follows a warmer than usual December and a mild January to date. As a result of a significant rain event on December 24 and 25, water levels are above normal for this time of year in the some of the lakes and rivers in the Rideau Lakes and Tay Valley sub-watersheds. Generally, water levels are at normal levels for the remainder of the watershed.  Although…
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Rideau Valley Conservation Authority
3889 Rideau Valley Drive
Manotick, Ontario K4M 1A5

613-692-3571, 1-800-267-3504



Regular Hours: Monday to Friday, 8:30 a.m. to 4:30 p.m.

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