THJORS RIVER

Icelandic Thjrs longest stream in Iceland. Rising from the central plateau northeast of Hofs Glacier, it flows southwestward for 143 miles (230 km) and then discharges into the Atlantic Ocean southeast of Selfoss. The Thjrs River and its largest tributary, the Tungna (80 miles long), carry away meltwater from Vatna, Hofs, and several smaller glaciers, while draining a basin of 2,907 square miles (7,530 square km), the lower third of which is part of the island's most extensive farming region. Because of its size and its location in the densely populated southwest, the Thjrs generates more electrical power than any other stream in Iceland.