muddy way along the rhine island namedyer werth

infrastructure mittelrheintal westerwald leutesdorf freshwater andernach reservoir transport namedyer waterway rheintal riverbed koblenz germany neuwied remagen walkway wetland asphalt flowing island valley namedy winter bridge stream rivers moving supply muddy rhine werth hills shore river brohl water canal track rhein gorge bonn east blue west area linz tree road snow lane flow big