Lahn - Fauna Und Flora

Fauna Und Flora

In 1999, the Lahn was classified as Biological Grade II and Chemical Grade I. Overall it is considered natural. The migrations of fish such as salmon are hindered by the river’s weirs and water levels, but attempts have been made through the installation of fish ladders to reintroduce formerly native fish. After the end of gravel mining in mid-1990s, the river between Lahnau, Heuchelheim, and Dutenhofen (of Wetzlar) in the middle Lahn Valley has developed into one of the largest nature reserves in Hesse, known as the Lahnau Nature Preserve.

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