A Manning´s coefficient of n = 0.03–0.04 m -1/3 s was derived for the lower part, possibly because the peak discharge was estimated only 125 m 3 s -1 with flood depths of 0.5–1.5 m.
Þar fæst Manningsstuðull upp á n = 0,03–0,04 m -1/3 s við rennslið 125 m 3 s -1 og 0,5-1,5 m flóðdýpt.