Rottnan

River in Norway, Sweden

60°33′01″N 12°25′21″E / 60.550197476°N 12.42260019°E / 60.550197476; 12.42260019 • elevation521 metres (1,709 ft) MouthFryken

• location

Rottneros, Sweden

• coordinates

59°47′36″N 13°07′48″E / 59.793310°N 13.129954°E / 59.793310; 13.129954

• elevation

62 metres (203 ft)Length110 km (68 mi)^[1]Basin size960 km² (370 sq mi)^[1]Discharge • average12.9 m³/s (460 cu ft/s)^[2] • maximum63 m³/s (2,200 cu ft/s)^[2]

Rottnan (Swedish) or Rotna (Norwegian) is a 110-kilometre (68 mi) long river in Norway and Sweden. The river starts south of Hof Finnskog in Solør, Norway and discharges into lake Fryken at Rottneros in Värmland, Sweden. The river passes through the municipalities of Åsnes and Grue in Innlandet county, Norway and through the municipalities of Torsby and Sunne in Värmland County in Sweden.^[3]

Rottnan used to have three waterfalls close to the mouth in Fryken. Rottnafallet was the last and tallest at 26 metres (85 ft) height. The waterfalls were built in 1927 for hydroelectric power. The name Rottnan comes from the old Swedish word Rotn which means "the roaring".

The waterfall Skarpedsfallet in Rottneros, Sweden
The waterfall Rottnafallet and the pulp mill Rottneros bruk in Rottneros, Sweden

References

^ ^a ^b "Rottnan". Nationalencyklopedin (in Swedish). Retrieved 14 July 2010. (subscription required)
^ ^a ^b "SMHI".
^ Thorsnæs, Geir, ed. (6 January 2020). "Rotna". Store norske leksikon (in Norwegian). Kunnskapsforlaget. Retrieved 13 March 2022.