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In the Isar: Excavators for the Tölz flood protection

2022-02-17T12:13:59.939Z


In the Isar: Excavators for the Tölz flood protection Created: 02/17/2022, 1:00 p.m Dredging has been going on in the river bed since Monday. The remaining gravel is removed and driven off by truck. © Proehl It's a "routine measure," say the municipal utilities. Excavators are currently removing gravel between the Isar bridges and putting it back behind the reservoir. Bad Tölz – At the beginni


In the Isar: Excavators for the Tölz flood protection

Created: 02/17/2022, 1:00 p.m

Dredging has been going on in the river bed since Monday.

The remaining gravel is removed and driven off by truck.

© Proehl

It's a "routine measure," say the municipal utilities.

Excavators are currently removing gravel between the Isar bridges and putting it back behind the reservoir.

Bad Tölz

– At the beginning of the week, the municipal utilities started their “routine measure” again “to protect Bad Tölz from wet feet during the next flood,” according to a press release.

Around 5,000 cubic meters of gravel are taken from the Isar between the Isar bridge in the old town and the Isar bridge on the bypass road and returned to the river north of the Isar power plant, at the height of the Leitzinger Au.

The work, which was last carried out in 2020, should be completed in around two weeks.

The Stadtwerke put the costs at around 25,000 euros.

"This investment to protect the population is necessary every two to three years," according to the press release.

Normally, the Isar carries the gravel further and further downstream due to the natural drift, but this is interrupted by the Tölz reservoir.

Since the gravel accumulates between the two bridges due to the reduced flow rate and takes up indispensable space during the next flood, it is now removed with an excavator and transported away by truck.

North of the power station, the gravel is piled up in the river to form a longitudinal dam.

This should then be slowly removed naturally by the Isar.

Prevent surface water and groundwater from mixing

"We are interrupting the natural speed of the Isar with the reservoir, so it goes without saying that we do everything we can to keep the river dynamic," says Stadtwerke Managing Director Walter Huber about these routine measures before the flood season.

"We also want to prevent the flowing water from deepening in the underwater riverbed in the event of a flood, which would eventually result in polluted surface water and pure groundwater mixing."

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Source: merkur

All news articles on 2022-02-17

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