Main source Haugsjåsund, Telemark Basin size 4,000 km (1,500 sq mi) Source Telemark Country Norway | River mouth Arendal, Aust-Agder Length 210 km Mouth Arendal | |
![]() | ||
Nidelva in Aust-Agder is the main river in the Arendal drainage basin. It is formed by the confluence of two rivers, Nisserelva and Fyreselv. The river flows into the Skagerrak at Arendal. The total length of the system is 210 kilometres (130 mi), the watershed covers 4,000 square kilometres (1,500 sq mi). Sixteen hydro-electric power stations are built along the river, making this one of Norway's most controlled drainage systems.
Map of Nidelva, Norway
Salmon can be found 22 kilometres (14 mi) up the river, where the Evenstad power station is located. At Rygene, the average waterflow is 110 cubic meters per second (m³/s), but the highest recorded was in the autumn of 1987, with 1200 m³/s.
References
Nidelva (Aust-Agder) Wikipedia(Text) CC BY-SA