The Svartefoss is a waterfall on the south-east side of the Fjaerlandsfjorden. There is no road, visiting the waterfall is only possible by boat/ferry from Fjærland, a little town with a nice glacier museum: the Norsk Bremuseum. Not so big but very informative. Fjærland is part of the Leikanger municipality in the region Sogn og Fjordane.
The Svartefoss is an official named waterfall in a watercourse without a name and is about 500 meters high. The only photo I am sure of is the one of Google streetview.
There are several other waterfalls in the Fjærlandsfjord like the Migandefoss, Kyrafossen, Distadfossen and many unnamed waterfalls. In the summer season it is possible to visit the narrow Fjærlandsfjord, with its steep and forested mountainsides, by boat. When driving on the west side of the Fjærlandsfjord, on road 152, you will notice the Migandefossen on the other side of the fjord. Melting water plunges down over a height of 600 meters. The Migandefossen is fed by several lakes and melting water of the Frudalsbreen on an altitude of 1598 meters.