Due to concerns about possible fish deaths, the Ruhr Association wants to supply oxygen to several dams in the Sauerland in the coming weeks. The Ruhr Association announced that oxygen tanks have been installed and hoses have been installed at the Möhne Dam and the Henne Dam in order to be able to react quickly in an emergency. Aerating the water in autumn is a precautionary measure that we have experienced in recent years.
The last few weeks before fall storms cause the water layers to move naturally again can be a critical time for fish. After a hot summer, there is often almost no oxygen left in the middle layers of the water due to biological processes. This can be dangerous for fish that prefer cooler temperatures and live in the interior of the dam.
From late summer onwards, the oxygen content in the deepest water layers is checked regularly. If the value is critical, oxygen is added to the water for about four weeks so that the fish are not endangered, the Ruhr Association said.
The low oxygen content in the dam does not impact the quality of drinking water.
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