As of: January 31, 2024, 6:11 a.m
By: Josef Ametsbichler
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The groundwater level at the “Hohenlinden 2” measuring point rose by 1.5 meters within a few weeks – from “very low” to “very high”.
A rainy year in 2023 is responsible. The precipitation seeps into the groundwater with a delay.
© Johannes Dziemballa, graphics: NID
A rainy year in 2024 will drastically influence the groundwater levels in the Ebersberg district.
A pleasing circumstance for the water management office.
The question is whether this increase is consistent.
District
– Experts have been concerned about the groundwater levels in the region for years.
“Basically, the long-term trend is downwards,” says Marion Natemeyer, head of the department responsible for the Ebersberg district at the Rosenheim Water Management Office.
Things have been completely different over the past few weeks.
What was anathema to day trippers and outdoorsy people in the past year of 2023 is a ray of hope for the water expert.
It rained more than it had in a long time.
Now the measuring points show: The precipitation also reaches the groundwater.
It was wet in spring and at the end of the year
Two distinctive rainy periods characterize the year 2023: spring with April and May and late autumn and winter from October to December.
This includes the record snowfall at the beginning of December.
It kindly thawed more slowly as it fell from the sky and seeped thoroughly into the groundwater.
Natemeyer's office recorded a total of around 400 millimeters (liters per square meter) more precipitation than the long-term average in 2023.
With a district long-term average of around 1000 millimeters, that's a big plus.
Meadows under water, like the sports field in Markt Schwaben in the picture, are a good sign for the groundwater experts: the rain does not run off, but sits.
© Johannes Dziemballa, graphics: NID
This is also noticeable at the measuring points.
The “Hohenlinden 2” station even reports a “very high” water level from the gravel plain.
Before a sharp increase from November 2023, it was still “very low”.
Then within a few weeks it rose by around 1.5 meters.
At Aßling, surface water is also bubbling out of the Kupfgraben spring more diligently than it has been for a long time.
Natemeyer cannot predict whether the recovery will last in the long term, because a good year does little to change the trend - such events last occurred in 2013 and 2002;
with even higher groundwater levels.
Back then, some cellars even got wet, she remembers, in Poing for example.
The current levels are not yet sufficient.
Heat pumps and wells in Vaterstetten are running dry
And so the extra water underground is very welcome – also for practical reasons.
Mayor Leonhard Spitzauer reports from his Schottereben community of Vaterstetten that farmers and groundwater heat pump owners had to deepen their wells in order to be able to continue using them.
Because the levels sank lower than ever before.
The horse trough pump on Spitzauer's home farm near Parsdorf was also affected in 2023, as was the heating of the daycare center in Birkenweg.
“You need permission from the water management office, then you dig and the pump is hung lower,” says the mayor, explaining the necessary procedure.
Her agency tends to issue these permits so as not to cut off farmers from their water and homeowners from their heating source, said Natemeyer, water management department head.
But she prefers that there is simply enough water.
“It's a good thing,” she says about the year 2023. Except that the precipitation measurement starts at zero again at the turn of the year.
(By the way: Everything from the region is now also available in our regular Ebersberg newsletter.)
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Water suppliers are not in trouble - but they are not yet benefiting from the heavy rain either
The water suppliers are more distant about the development.
Thilo Kopmann estimates that it will not be possible to say whether the high amount of precipitation in 2023 will also reach the second groundwater level in May at the earliest.
Kopmann is managing director of the municipal company Vemo, which supplies around 86,000 people in the districts of Ebersberg, Erding and Munich from its well near Zorneding.
He looks at the layers at a depth of around 40 meters, while the first layer of groundwater in the gravel plain is largely less than half as deep.
At least the situation has stabilized somewhat at depth - albeit at an unprecedentedly low level.
“Citizens are becoming increasingly more careful with their drinking water,” Kopmann praises.
Despite the summer being very hot at times, consumption “did not rise exorbitantly”, which Kopmann attributes to conscious savings efforts.
Nevertheless, a wet year is no reason to splash and splurge, he warns: “We have to look to the next 20, 30 years and longer.”
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