Arendalsvassdraget
Arendalsvassdraget is the name of a river system in Norway . It includes lakes and rivers in ten municipalities in Telemark and Agder . The catchment area covers 4015 km². The upper part of the river system lies in West Telemark and consists of the lakes Vråvatn , Nisser , Fyresvatn , Birtevatn and Nesvatn with the associated tributaries including Finndøl , which flows from Fyresdalheiene to Fyresvatn.
The river Nisserelva flows from Nisser and the river Fyreselv (also: Fyresåna ) flows from Fyresvatn . There they meet the river Nidelva , which in turn flows into the Skagerrak at Arendal .
Arendalsvassdraget has a total length of 209 km; There are 15 hydropower plants on this route. The mean flow rate is 110 m³ / s (measuring station at the Rygene power plant ), the maximum value is 1,200 m³ / s (autumn 1987).
Hydropower plants
| power plant | Height of fall (meters) |
Flow rate (m³ / sec) |
Max. Power (MW) |
Mean annual prod. (GWh) |
|---|---|---|---|---|
| Finndøla | 303 | 40 | 103 | 150.6 |
| Dynjarfoss | 81 | 45 | 33 | 183.6 |
| Berlifoss | 29 | 43 | 9 | 61.2 |
| Jørundland | 282 | 22.5 | 50 | 100.7 |
| Skafså I | 260 | 8.2 | 17.6 | 136 |
| Skafså II | 91 | 20th | 15th | 72 |
| Fjone | 256 | 23 | 50 | 125 |
| Nisser dam | 5.5 | 38 | 2.5 | 13.7 |
| Tjønnefoss | 18th | 43 | 6th | 42 |
| Høgefoss | 64 | 45 | 22nd | 159 |
| Åmli -Gjøv | 54.5 | 40 | 18.6 | 66 |
| Åmli -Nidelv | 5 | ? | 6th | 30th |
| Flatenfoss | 11 | 120 | 10 | 60 |
| Bøylefoss | 62 | 120 | 80 | 360 |
| Evenstad | 17th | 170 | 25th | 119 |
| Rygene | 38 | 180 | 52 | 273 |