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So that the Große Gaißach stays in her bed

2020-09-30T15:08:46.396Z


The flood protection on the Große Gaißach is making progress. Further important steps are to follow in autumn.


The flood protection on the Große Gaißach is making progress.

Further important steps are to follow in autumn.

  • The Große Gaißach repeatedly overflows its banks in heavy rain

  • In the future, a dike will direct the water back into bed

  • The next step should take place in autumn

Gaißach / Bad Tölz -

At the beginning of August, the Große Gaißach swelled into a torrent after heavy rainfall.

Driftwood that was carried along jammed a weir that could no longer be opened.

The water overflowed.

As reported, this barrier structure is supposed to be dismantled.

As Dora Schulze, department head at the Water Management Office (WWA) Weilheim, explains, this cannot be easily removed.

“It supports the sole, the bridge and thus also the road.” Therefore, this has to be approached carefully and will take place in the course of the flood protection measures.

A precaution has already been taken: the inlet to the Linsensägbach, which flows from the Große Gaißach in the direction of Moraltpark and finally flows into the Isar, has been closed.

According to Schulze, this measure was taken due to the currently unpredictable weather and the large amount of dead wood, “so that the water does not run off uncontrolled”.

Weir is being dismantled, the river bed deepened

Andrea Vogg, project manager in the hydraulic engineering department at WWA, explains the progress of the measures on the Große Gaißach.

A dike is to protect the residents of Tölzer Blombergstrasse and push the water back into the stream.

"The dike is designed for a 100-year flood," says Vogg.

One reckons with water volumes of up to 92 cubic meters per second.

The Gaißach will continue to run under the B13.

In addition to dismantling the weir, it is also planned, for example, to deepen the river bed by one meter.

The plans are in place.

These are to be presented to the community of Gaißach and the city of Bad Tölz in autumn.

"Towards the end of the year we could then initiate the water law procedure," said Vogg.

Then the plans are publicly displayed.

Residents and associations, such as the Bund Naturschutz, have the opportunity to raise their objections.

These are then processed and discussed at an appointment in the district office.

"But we try to involve everyone in advance," says Vogg.

There is an accompanying landscape conservation plan, the lower nature conservation authority and the fishing associations are involved.

“But of course you don't know what kind of objections will come up,” says Vogg.

The procedure could take half a year or "open to the top".

The football field remains and moves south

Basically, however, she has perceived a high level of acceptance for the project, said Vogg.

"Most of the residents are very happy, the desire for protection is there."

Attempts have also been made to address a number of issues.

For example, residents have expressed the wish that the football field there should be preserved.

"At the moment it is exactly in the area where the dike is being built," says Vogg.

But a way was found to move the football field south.

"We also want to upgrade it and build a small grandstand in the dike."

The dike itself should remain flat and manageable.

At the highest point it is 2.50 meters high.

On top of that there is a path, there will be ramps for farmers to drive over.

“It will blend in with nature,” says Vogg.

Also read:

Travel warning in neighboring Tyrol is bagging restaurateurs and hoteliers

Corona crisis: Christmas market in Bad Tölz canceled

Lecture by LBV experts: This is how important the Upper Isar is for endangered species

Source: merkur

All news articles on 2020-09-30

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