description Blue Nile Overview
The Blue Nile is a major river originating at Lake Tana in Ethiopia and flowing roughly 1,450 kilometers (900 miles) to its confluence with the White Nile in Sudan. Along its route, it traverses deep canyons and highlands, dropping significantly in elevation before reaching the lowlands and merging with the White Nile at Khartoum to form the main Nile River. During the summer monsoon season, seasonal rains in the Ethiopian Highlands cause massive flooding, contributing roughly 80 percent of the water volume that flows down the Nile toward Egypt.
insights Ranking position
Blue Nile ranks #8 of 355 in the River ranking, behind Tigris River, ahead of Yarlung Tsangpo River.
help Blue Nile FAQ
Where does the Blue Nile begin and where does it join the White Nile?
The Blue Nile flows from Lake Tana in Ethiopia and travels into Sudan. It meets the White Nile at Khartoum, after which the combined river continues north as the Nile.
Why does the Blue Nile carry so much sediment?
Seasonal rains over the Ethiopian Highlands wash soil and sediment into its tributaries. Historically, this flood-borne material contributed to the fertile silt deposited farther downstream in the Nile Valley.
What is the importance of Ethiopia's Grand Ethiopian Renaissance Dam?
The Grand Ethiopian Renaissance Dam is a major hydroelectric project on the Blue Nile near Ethiopia's border with Sudan. Its filling and operation have prompted prolonged negotiations among Ethiopia, Sudan, and Egypt over water management.
Is the Blue Nile longer than the White Nile?
No. The White Nile is the longer headstream, while the Blue Nile is shorter and has its source in the Ethiopian Highlands. During the rainy season, however, the Blue Nile supplies a particularly large share of the water reaching Sudan and Egypt.
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