As of: March 9, 2024, 8:03 a.m
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The so-called tracer is introduced at groundwater measuring points.
Where he comes out is being watched.
© Rosenheim Water Management Office
Starting next week, the State Building Authority will use color tests to check whether the calculations of the groundwater flow in Starnberg are correct.
The reason is the tunnel.
Starnberg
- The Weilheim State Building Authority is expected to have groundwater flows under Starnberg examined again from Monday, March 11th in advance of tunnel construction.
It is a so-called tracer experiment, in which a colored marker (tracer) is added to groundwater measuring points as a dissolved powder in small quantities in coordination with the district office, the State Office for the Environment (LfU) and the Weilheim Water Management Office (WWA) and then rinsed with fresh water Water is piped into the groundwater.
Observation points are then used to monitor where the tracer appears again and in what quantities.
“The results of the tracer test will be used to verify the calculations of the relevant flow velocities and flow behavior of the groundwater stream,” the authority said.
The groundwater markers uranine and naphtionate are used, which are harmless in terms of water quality “as the substances used decompose on their own and are completely broken down”.
The tracer test is carried out between the B 2 height of the Almeida site to the northeast towards Lake Starnberg, outside the catchment area of the sources of the Institute of Fisheries and surface waters (Siebenquellebach).
The test with the dyes takes four weeks, and the entire examination lasts until the end of May.