Blue Nile, known locally as Abbay, flows for 800 km within Ethiopia to meet the White Nile in Khartoum to form the great river that gives life to Sudan and Egypt. It has been said that the Blue Nile contributes up to 80% of the Nile’s flow.
Blue Nile falls known locally as ‘Tis Isat- smoke of Fire’. 400 meters wide when in flood, and dropping over a sheer chasm more than 45 meters deep the falls throw up a continuous spray of water, which drencher or wet on visitors up to a kilometer away. This misty deluge produces rainbows, shimmering across the gorge, and a small perennial rainforest of lush green vegetation, to the delight of the many monkeys and multicolored birds that inhabit the area. Blue Nile Falls have also determined an out of the ordinary phenomenon. Their presence has isolated Lake Tana from the Blue Nile River and the eco-diversity is different in the lake than in the river. The fauna of the lake is greatly influenced by this separation.