The river rises at an elevation of 2,850 m in the Shewan highlands and discharges into the Omo river at an elevation of 1060 m. Due to its steep gradient, it is a quickly flowing river with many falls.
In particular to mention are the Acho Falls near Welkite with a height of 60 meters.
Southwest of Welkite and several kilometers short of its confluence with the Omo River the river shows a very steep series of rapids with an elevation drop of ~400 m in just four kilometers.
Due to its special characteristics, the river is (in 2018) under investigation for hydroelectric electricity generation by using the hydropower of the river.
This article related to a river in Ethiopia is a stub.