Background
The river Lahn is a tributary of the river Rhine. It has a catchment area of 5 931 km2 and is located in the German Federal States of Hesse, North Rhine-Westphalia and Rhineland-Palatinate. On its 240 km route to its confluence with the Rhine at Lahnstein, the river Lahn flows mainly through the central Hesse region. Currently, the ecological s ...