The Blue Nile ( Bahr Al-Azraq ) is a junction of the the Nile. It takes its source in Ethiopia, where it forms the Lac Tanned as of its first kilometers before carrying on its road towards the Sudan where it joined the White Nile with Khartoum to form the the Nile.

Even if it is less long and perhaps less known than the White Nile, the Blue Nile is however essential in the Nile since it is responsible for 85% of its flow approximately. It is thus for a long time the object of many tensions between Egypt, Sudan and Ethiopia, in particular since the end of the 19th century, at the moment when were built the first large Barrage S in the basin of the Nile.

If, in its crossing of Egypt, the Nile, broad of 800 with 1  500 meters, evokes a quiet lake, its African childhood is capricious and violent. In Ethiopia, the Blue Nile does not have anything to envy the falls of its Ugandan twin, the White Nile: falls foam downstream from the lake Tana. The water spray which is pulverized is worth them the name of Tis Esat , the " smoke without feu". They are 50 meters top.

The lake Tana is the water tower of the Blue Nile. This one is thrown to it under the name of Petit Abbaï and Grand Abbaï comes out from it to dig a canyon with basalt cliffs cut of rapids on 1  200 meters of uneven.

To explore the gorges of the Blue Nile remains a perilous adventure inside Ethiopia.

The Fleuve sinks , like the Arabs call the Blue Nile because of its dark color which its strong content of silt gives him, after having traversed 1  563 km, joined the White Nile where the capital of Sudan (Khartoum) was built. Its rising precedes one month that of its twin. Before the junction, it follows a curve which the local language translates by the image of " mislead in éléphant". On its left bank, old Moslem cities are coiled of which Omdurman.