Flóaáveitan are canals that run through the entire Flói region, from Ölfusá river in the west to Þjórsá river in the east. This monumental construction consisted of 300 km long canals and 900 km of embankments. The Flói irrigation system reached over 12 thousand hectares of land and became a major transition in farming in the area at the time. The construction of Flói irrigation system began in 1922 and irrigation began its activities in 1927. When the irrigation was inaugurated in 1927 it was one of the greatest structures in Europe, and to this day it plays an important role in transferring water between farms.