Waterbody Type:Large highland river (type 9.2)
Mid-sized coarse substrate-dominated siliceous highland river (type 9) 
Small coarse substrate-dominated siliceous highland river (type 5)
Elevation:96 m.a.s.l. to 826 m.a.s.l.
Lenght:129,2 km
Discharge:Mean low water: 8 m3/s
Average Discharge: 30 m3/s
Mean high water: 260 m3/s
Basin:1.353 km2
Particularities:The course of the lower Lenne ist characterised by narrow valleys, with some settlements located very close to the river banks. Large parts of the river are used for hydropower generation. Starting at the Bigge mouth, the discharge of the Lenne is affected by the dam and reservoir system.