The LakeLab in Lake Stechlin consists of a large central enclosure (30 metres in diameter) and 24 enclosures of 9 metres diameter that serve as the experimental units. Their walls are made of special plastic sheets fastened to a floating aluminium ring and stabilized by a supporting underwater structure. To the bottom, the sheets reach down into the sediment of the lake. The enclosures are held together by steel cables and are surrounded by a floating circular walkway. The entire setup is anchored to the lake ground, preventing the LakeLab from drifting.

Inside the enclosures, instruments continuously deliver data from various water depths, which are transmitted to a computer and stored in a database. This produces records of the water temperature, oxygen content and light conditions, for example.

Using a sprinkler system to recirculate the water, the researchers can actively modify the environment inside the enclosures. Thus, it is possible for example, to experimentally increase the depth of the warm surface water layer or the temperature of the deep water as well as to destroy the thermocline during summer stratification simulating a heavy summer storm. These conditions are expected to occur in Lake Stechlin over the next few years or decades as a result of climate change.
  

Companies involved

System construction: Ago Hydroair, Berlin

Profiler system: ISW-Wassermesstechnik, Fünfseen

Measuring probes: Ecotech, Bonn; bbe-moldaenke, Kronshagen