It is fed by springs and discharges at the Rótarsandur area and the Brúará Canyons.
The whole river course is designated as a nature protected area.
[1] The name comes from a type of natural bridge that overpassed the river near the bishup-seat in Skalholt.
According to sources from the bishop a worker of the bishop broke the bridge in 1602 because the seat didn't want dirty wanderers to have it to easy to approach.
This article related to a river in Iceland is a stub.