Description of Blue Nile Falls
Tis Abay has formed on the edge of an ancient flow of basaltic lava. The Blue Nile here has flown for some 30 km after leaving Lake Tana. Already before the falls river has crossed numerous smaller waterfalls and rapids.

The Blue Nile in this area often divides into smaller streams> At the waterfalls it also divides into four smaller streams, in the dry period of the year (January – March) forming four smaller falls but in the rainy period of the year (September – October) forming a roaring giant which was 400 m wide.
At high water above the falls rose a cloud of mist – thus it was named “smoking water”. The continuous mist created a small oasis of the forest around the falls with numerous birds and monkeys.
The influence of waterfall below the water level is much bigger – the approximately 37 – 45 m tall waterfall is an insurmountable barrier for fish. Thus Lake Tana has its own, unique species – 17 out of 28 species of the fish in the lake are endemic.
History
Tis Abay is located in an ancient land and people have known this waterfall much longer than most of the other waterfalls in the world.
The first known description of the falls belongs to a Portuguese doctor and adventurer João Bermudes in 1565. Not too far below the falls Portuguese built also the oldest stone bridge in Ethiopia – Agam Dildi, built in 1626.
Many visitors came to these falls and in many descriptions, Tis Abay was presented as one of the greatest spectacles in the natural world.

Since 2001 the situation changed for the worse. Next to the falls is built a hydro-electric station (Tis Abay II) which during most of the year takes some 90% of the water away. Only during the rainy period of the year, the waterfall regains a part of its former beauty – but even then it has a lot less power than before.
Due to this nowadays the impressions of visitors to the falls are mixed. Some like the scenery but some are just disappointed – instead of the wide, roaring fall, there is falling a narrow stream or two streams.
Blue Nile Falls – Tis Abay on the map
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Location, GPS coordinates: | 11.4908 N 37.5877 E |
Categories: | Waterfalls |
Values: | Geology, Visual |
Rating: | ![]() |
Where is located? | Africa, Ethiopia, Amhara, on Blue Nile some 36 – 38 km below its source – Lake Tana |
Writing in Geʽez: | ጥስ እሳት |
Meaning of name in Amharic: | “Smoking water” |
Alternate names: | Tis Abay, Tissisat, Tis Isat (“Smoke of fire”) |
Total height: | 37 – 45 m |
Drops: | 1 |
Width: | up to 400 m |
Stream: | Blue Nile |
Video of Tis Abay
Arek Braniewski, December 2015
Landmarks of Ethiopia

Waterfalls and rapids

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