| Waterbody Type: | Large highland river (type 9.2) |
| Elevation: | 17 m.a.s.l. to 674 m.a.s.l. |
| Length: | 219.5 km |
| Discharge: | Mean low water: 17 m3/s Average discharge: 76 m3/s Mean high water: 691 m3/s |
| Basin: | 4485 km2 |
| Usage: | |
| Peculiarities: | The course of the lower and middle Ruhr is affected by numerous impoundments and drinking water plants. Large parts are subject to hydropower generation. Starting at Meschede, the river’s discharge is affected by the reservoir and dam system. |