Although there will be a peak in the water level on the IJsselmeer today, this appears to have favorable consequences for the water level of both the IJsselmeer and the Markermeer. Due to the northeasterly wind, the high water can now be discharged.
After yesterday’s record peak on the Markermeer, about 44 centimeters above NAP (Normal Amsterdam Level), the water level on the lake seems to be moving very carefully in the right direction. But not before another peak arrives at the IJsselmeer.
“There has been a peak on the Rhine, with water flowing via the IJssel towards the IJsselmeer,” a spokesperson for Rijkswaterstaat explains to NH. The northeasterly wind that is now blowing also ensures that the water is transported to the IJsselmeer. “The water is therefore pushed up on the IJsselmeer, we have also seen that in recent days.”
The northeasterly wind appears to be positive news for flooding. “We can now immediately drain what comes into the IJsselmeer due to the favorable wind. The expectation is that the water level on the IJsselmeer will decrease as a result, so that we can also drain onto the Markermeer. This is only possible if the water level on the IJsselmeer is lower then on the Markermeer.”
According to Rijkswaterstaat, the fact that this has not happened before has to do with ‘all kinds of things’. “Until the weekend, the water in the IJsselmeer was not lower. And we cannot just open everything, that is partly due to the wind.”
The average water level at the Markermeer is now 34 centimeters above NAP, the spokesperson says. That is a lot lower than last weekend. How the water level will develop in the coming days remains a guess.
“It is difficult to predict how fast the water is moving. We know that a peak will occur on the Rhine, but it is not clear when that water will reach the IJsselmeer. We cannot yet predict the influence of the wind, but there will be no rain, so that’s positive. It’s going in the right direction.”
Rijkswaterstaat reports that the lower temperatures have little influence on the water level. In an earlier conversation with NH, the Hollands Noorderkwartier Water Board warns that skating on natural ice where grinding takes place can be dangerous.
The water flows fast under the ice, creating a considerable current. Air can also get between the water and the ice layer due to falling water levels, which can cause the ice to break more quickly.
Rijkswaterstaat yesterday opened the discharge sluice in the Oranjesluik complex above Amsterdam. This allows water from the Markermeer to flow away via the North Sea Canal to the North Sea.
The level of the North Sea Canal is being closely monitored, according to the water manager. The Oranjesluis complex remains closed to shipping. The locks and lock gates are part of the flood defense around the Markermeer and must therefore be closed at high tide. According to Rijkswaterstaat, the Markerdijk will also be closely monitored in the coming days.
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The post first appeared on www.nhnieuws.nl