Since last week, the water level at Grand Lac Rond has risen from 17 cm (6.6 inches) to 147.35 m. The week before, he had climbed 20 cm (7.8 inches). The reasons for these big changes are due to heavy rainfall and discharges from the dam at Lac des 31 Milles. (The water level of Lac des 31 Milles is also very high for this time of year. The CEHQ tries as much as possible not to increase the flows evacuated by the dam to limit the impacts on Grand Lac Rond.)
The water level of Grand Lac Rond is high compared to previous years for this time of year:
• July 10, 2021 - 147.35 m
• July 10, 2020 - 146.95 m
• 07 July 2019 - 147.56 m (the year of heavy flooding)
• July 10, 2018 - 147.33 m
• July 10, 2017 - 147.64 m (the year of heavy flooding)
• July 11, 2016 - 147.24 m
• July 11, 2015 - 147.02 m
• July 11, 2014 - 147.14 m
• July 08, 2013 - 147.54 m
• 07 July 2012 - 146.85 m
• July 10, 2011 - 147.36 m
The forecast for the coming week includes several days of precipitation that could keep water levels high.
The forecast for the coming week includes several days of precipitation that could keep water levels high.
For the past few days, Michael Lukyniuk has been making daily water level reports, which he submits to the Quebec Water Expertise Center. As of this morning, here is the Centre's response to Michael's reports and the weather forecast for our lake: the level of Grand Lac Rond may be rising over the next few days. We will try as much as possible not to increase the flows evacuated by the Hubert-Tremblay dam in order to limit the impacts.
Since last week, the water level has risen by 20 cm (8 inches) due to heavy rainfall and the discharge of the dam at Lac des 31 Milles. The water level is now at 147.18m - a fairly high level but good for this time of year:
• July 1, 2021 - 147.18 m
• July 6, 2020 - 146.97 m
• July 2, 2019 - 147.54 m (the year of the floods)
• July 6, 2018 - 147.37 m
• July 7, 2017 - 147.60 m (the year of the floods)
• July 5, 2016 - 146.94 m
• July 4, 2015 - 147.02 m
• July 5, 2014 - 147.11 m
At Lac des 31 Milles, the water level rose 13 cm. It is extremely high at 162.25 m (normally it would be 162.10 m for this time of year) and the Quebec Water Expertise Center has indicated that they will increase the flow of the dam from 2.4 to 4.8. m3 / s in the next few days.
Since last week, the water level of the Grand Lac Rond has remained low but stable despite a precipitation of 24 mm. This suggests that all of the water entering the lake from precipitation and upstream discharges exited the lake through the stream to the Gatineau River. The lake was unable to hold water to maintain a healthy water level. Low water levels mean warmer water which is not good for fish and promotes algae growth. It also creates more dangers for boaters.
At Lac des 31 Milles, the water level has risen by 1 cm and is at its normal level for the summer season despite generally low water levels throughout the region.
The water level of Grand Lac Rond is low for this time of year:
• June 24, 2021 - 146.98 m
• 23 June 2020 - 147.09 m
• June 24, 2019 - 147.56 m
• June 19, 2018 - 147.52 m
• June 22, 2017 - 147.34 m
• June 25, 2016 - 147.03 m
• June 25, 2015 - 147.14 m
• June 24, 2014 - 147.19 m
• June 23, 2013 - 147.26 m
Since my last report on May 30, the water level at Grand Lac Rond has dropped from 10 cm to 147.0 m. It is very low. The lack of precipitation and the leakage of water through the stream to the Gatineau River are the main reasons for the very low level. When we compare the water level with the same period in past years, we can better understand the situation:
June 12, 2021 - 147.00 m
June 11, 2020 - 147.39 m
June 13, 2019 - 147.49 m
June 16, 2018 - 147.47 m
June 12, 2017 - 147.57 m
Jun 11, 2016 - 147.21 m
June 08, 2015 - 147.26 m
On average, the water level of Grand Lac Rond is 40 cm (16 inches) lower than usual for this time of year.
At Lac des 31 Milles, the water level has dropped by 3 cm since last week, but it is at its normal level for the summer season.
Since last week, the water level of the Grand Lac Rond has dropped by 12 cm (4 inches). It's a lot. When we make a comparison with Lac des 31 Milles, this upstream lake has been at the same water level since last week (but it is higher than usual for this time of year). The Grand Lac Rond is lower for this time of year:
May 29, 2021 - 147.10 m
May 30, 2020 - 147.23 m
May 29, 2019 - 148.80 m
May 31, 2018 - 147.31 m
May 28, 2017 - 148.11 m
May 28, 2016 - 147.29 m
May 31, 2015 - 147.34 m
May 27, 2014 - 147.72 m
May 31, 2013 - 147.67 m
I don't know if the CEHQ has made water level forecasts for this summer, but it would be interesting to know what lies ahead and what measures can be taken to stabilize the water levels.
Since my last report on May 2, the water level of the Grand Lac Rond has risen by 7 cm thanks mainly to precipitation and the discharge of water from the dam upstream. Lately the water level at the Grand Lac Rond is quite stable but a little low for this time of year:
21 May 2021 - 147.22 m
16 May 2020 - 147.28 m
20 May 2019 - 148.48 m
22 May 2018 - 147.43 m
20 May 2017 - 148.38 m
22 May 2016 - 147.39 m
20 May 2015 - 147.31 m
21 May 2014 - 147.80 m
18 May 2013 - 147.59 m
Here is my update on the great Lake Rond water level report.Since last week, the water level of The Great Rond Lake has risen by 2 cm thanks to precipitation during the week. But its water level is still very low for this time of year while the water level upstream at Lake 31 Thousands continues to rise.Here are the data for the water level at Great Lake Rond for this time of year:May 01, 2021 - 147.15 m
May 05, 2020 - 147.67 m
May 02, 2019 - 148.32 m
May 01, 2018 - 147.87 m
May 03, 2017 - 148.40m
May 6, 2016 - 147.90m
May 06, 2015 - 147.24m
Since my last report last week, the water level of The Grand Lac Rond has decreased from 8 cm to 147.13 m. In the same period, the water level of 31 Mile lake rose by 2 cm. There was little precipitation during this period (11 mm). Currently the water level of The Grand Lac Rond is the lowest for this time of year since at least 2011:
April 22, 2021 - 147.13 m
April 19, 2020 - 147.95 m
April 25, 2019 - 148.36 m
April 27, 2018 - 147.87 m
April 28, 2017 - 148.07 m
April 23, 2015 - 147.62 m
April 25, 2014 - 147.94 m
April 20, 2013 - 147.36 m
April 21, 2012 - 147.14 m
April 15, 2011 - 147.95 m
If it was the month of July, the water level of The Grand Lac Rond would be perfect. But by the end of April, it is extremely low. Fortunately, the water level seems to be stable lately which is encouraging.
Hello:
Here is my update on the Grand Lac Rond water level report.
Since my last report on April 11, the water level of Grand Lac Rond has dropped by 35 cm. That's a lot. I believe there are three reasons for this: the drainage of the lake by the creek, the absence of adequate amounts of precipitation (only 12 mm), and the absence of water upstream (for the same period, the water level of 31 Mile lake rose by 8 cm).
The water level of the Great Lake Rond is very low for this time of year:
April 18, 2021 - 147.21 m
April 19, 2020 - 147.95 m
April 25, 2019 - 148.36 m
April 27, 2018 - 147.87 m
April 13, 2017 - 148.07 m
April 18, 2015 - 147.52 m
April 19, 2014 - 147.67 m
Hello:
This is my first report on the water level at Grand Lac Rond for 2021.
I believe that the water level of The Grand Lac Rond is at its highest for the year, but this is at its lowest water level in five years:
09 April 2021 - 147.56m
07 April 2020 - 147.93m
April 13, 2017 - 148.07m
April 16, 2015 - 147.44m
April 12, 2014 - 147.33 m
07 April 2012 - 147.30m
At Lake 31 Miles, the level has started to rise since March 25 and on April 1, it reached its normal level for the summer months (162.05 m). This prevents the risk of downstream flooding.
Since my last report on October 29, the water level of Grand Lac Rond has dropped by 17 cm. The lack of precipitation and discharge of the dam at lake 31 Mile Lake are the reasons for this situation. When comparing the water level of The Grand Lac Rond for this period with previous years, it is 'normal':
November 07, 2020 - 147.09 m
November 06, 2019 - 147.20m
November 04, 2018 - 147.00m
November 05, 2017 - 147.46m
November 10, 2016 - 146.91 m
November 07, 2015 - 146.93m
Since my last report on October 15, the water level of Grand Lac Rond has remained completely stable. The 24 mm precipitation is the main reason for the stability of the water level because the discharge of the dam at the 31 Mile Lake is decreased (or negligible). The water level at Grand Lac Rond is the highest in recent years for this time of year:
October 28, 2020 - 147.26 m
October 22, 2019 - 147.00m
October 21, 2018 - 147.10 m
October 27, 2017 - 147.03m
October 27, 2016 - 146.85m
October 31, 2015 - 147.06m
Since my last report on September 28, the water level of The Grand Lac Rond has risen by 8 cm. It is at 147.28 m, which is the highest it has been seen for several years for this time of year:
October 14, 2020 - 147.26m
October 15, 2019 - 147.03m
October 14, 2018 - 147.13 m
October 14, 2017 - 147.13m
October 14, 2016 - 146.93m
October 14, 2015 - 147.02m
October 15, 2014 - 147.11 m
28 sept 2020
Since my last report on September 22, the water level of Grand Lac Rond has remained completely stable even though there had been no precipitation. Hooray! The reason is that the 31-Mile Lake Dam continues to discharge water from this lake, which has dropped by 6 cm. (This is an annual operation to promote lake trout spawning at Lake 31 Thousands.)
It is interesting to note that this water discharge represents the amount of water that The Grand Lac Rond needs to remain stable. It is also the amount of water that pours into the Gatineau River through a stream in Great Lake Rond. When you think about it in these terms, you realize the power of the creek to empty the Grand Lac Rond if there is no water inflow (precipitation and/or discharge from the dam). As many people have observed over the decades, a simple retention of water in the creek could greatly improve the stability of the water level at Grand Lac Rond and thus improve the environment and safety on the lake. Although there have been studies and support from municipalities, this project has never progressed.
So when we compare the water level of The Grand Lac Rond for the same period of the year with previous years, it is quite normal:
September 26, 2020 - 147.18 m
September 23, 2019 - 147.10 m
September 29, 2018 - 147.16m
September 27, 2017 - 147.21m
September 25, 2014 - 147.06m
September 29, 2012 - 147.16 m
Since my last report on September 7, the water level has dropped by 7 cm. But the water level has been extremely stable lately (since at least September 12) although we haven't had much precipitation (37 mm in two weeks). I think the reason that The Grand Lac Rond is very stable is because of the discharge of the 31 Mile Lake Dam. (The water level of Lake 31 Thousands has dropped by 5 cm. This is an operation that the CEHQ does every year to promote lake trout spawning.)
It is very encouraging to see the water level of The Grand Lac Rond so stable. If this is mainly due to the dam discharge, it must be realized that this also represents the discharge through the creek that leaves the Grand Lac Rond towards the Gatineau River. When the operation to promote lake trout spawning ends in mid-October, I believe that the water level of The Grand Lac Rond will drop rapidly without a good amount of precipitation. We'il see.
When comparing the water level of The Grand Lac Rond for the same period with previous years, it is quite normal:
September 20, 2020 - 147.18 m
September 20, 2019 - 147.05m
September 16, 2018 - 147.21 m
September 18, 2017 - 147.29 m
September 20, 2014 - 147.06m
Since my last report on August 28, the water level of The Grand Lac Rond has risen by 2 cm. It is at a very good water level when compared to previous years:
06 September 2020 - 147.25m
07 September 2019 - 146.90m
07 September 2018 - 147.16m
07 September 2017 - 147.21m
September 10, 2016 - 147.06m
05 September 2015 - 147.39m
09 September 2014 - 147.08m
September 10, 2013 - 147.02 m
During the month of August, the water level of The Grand Lac Rondwas at a healthy level (at 147.23 m on average) and very stable (ranging from only 8 cm). Good precipitation during the month (152 mm) and the flow of the 31-Mile Lake Dam (which dropped 12 cm from 162.18 to 162.06 m) were the main factors that led to this favourable situation.
