This regulated waterfall at the end of the Vikadalen near Naddvik/Ardal is a regulated waterfall that (probabaly) only will flow after a long period of heavy rainfall. There are no pictures available for this waterfall that should flow from the Riskalsvatnet over a height of 385 meters.
Another waterfall nearby, also regulated, is the Smørholefossen, also at the end of the Vikadalen. For waterfalls is is better to go to the Utladalen near Øvre Årdal: Avdalsfossen, Vettisfossen, Hjellefossen, Stølsmaradalsfossen and Midtmaradalsfossen. Heaven for waterfall spotters.