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Closing the gap in the underground: the city extends the groundwater model

2020-09-26T18:08:49.671Z


The city of Geretsired is expanding its groundwater model. So far it was only enough to the school center. Most recently, it brought the knowledge that the Schwaigwaller Bach influences the groundwater level in the flower district.


The city of Geretsired is expanding its groundwater model.

So far it was only enough to the school center.

Most recently, it brought the knowledge that the Schwaigwaller Bach influences the groundwater level in the flower district.

Geretsried -

At the beginning of August it rained continuously for days.

It was the first practical test for sealing the Schwaigwaller Bach.

The measure, which cost around half a million euros, seems to have paid off: most of the cellars remained dry.

Previously, the groundwater had regularly pressed in during heavy rain.

Almost ten years ago, long-suffering citizens founded the interest group for groundwater damaged and endangered Geretsrieder (IGGG).

In 2016 an engineering office created a numerical groundwater model for the north of Geretsried.

The experts found that the Schwaigwaller Bach uncovered in 2011 has an impact on the Schwaigwaller Bach.

The city council then initiated the sealing of the creek bed.

The groundwater model extends from the school center to Gut Buchberg between Schwaigwaller Bach and Isar.

Underground car parks are not taken into account, nor are the planned development of the Böhmwiese, where a train station is to be built when the S-Bahn route from Wolfratshausen to Geretsried is extended.

For this reason, the city is now expanding the groundwater model.

Building authority employee Lukas Schrettenbrunner presented the offer from the engineering office Tractebel Hydroprojekt to the holiday committee in April.

The extension to Tattenkofener Strasse did not go far enough for the members.

Therefore, the administration worked again and recently presented the issue again.

This time the building and environmental committee unanimously agreed to expand and update the groundwater model.

The costs for this amount to 43,500 euros.

The smaller program would have cost around 30,000 euros.

“It's about knowing the geography underground, knowing what is flowing where,” says Schrettenbrunner.

The engineers are now recording the groundwater flows as far as Stein, thus connecting to the Königsdorf groundwater model.

The western border forms the foot of the Schwaigwaller slope.

Overall, the groundwater model will be expanded by four and a half to five and a half square kilometers.

“I think the expansion is good.

It is also not as expensive as feared, ”said Dr.

Detlev Ringer, who in the vacation committee had spoken out in favor of a model that would extend to the planned south S-Bahn station.

This has now been taken into account.

Ringer warned, however, that the data must also be checked regularly, as it is written in the 2016 model.

Schrettenbrunner assured that the data collected over the past four years at Karl-Lederer-Platz will be incorporated into the groundwater model.

Heidi Dodenhöft and Edmund Häner (both Free Voters / FDP parliamentary group) asked for an interim status as to whether the previous groundwater model has proven itself.

sw

Source: merkur

All news articles on 2020-09-26

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