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The zero level of the main dam, the ground level, is at an elevation of about 500 m (1,600 ft) above sea level, corresponding roughly to the level of the river bed of the Blue Nile. Counting from the ground level, the main gravity dam is 155 m (509 ft) tall, 1,780 m (5,840 ft) long and composed of roller-compacted concrete .
The Blue Nile [note 1] is a river originating at Lake Tana in Ethiopia.It travels for approximately 1,450 km (900 mi) through Ethiopia and Sudan.Along with the White Nile, it is one of the two major tributaries of the Nile and supplies about 85.6% of the water to the Nile during the rainy season.
The Sennar Dam and Blue Nile, photo by crew of Discovery, STS-29, March 15, 1989. The Sennar Dam is an irrigation dam on the Blue Nile near the town of Sennar in the Al Jazirah region of Sudan. The dam is 3,025 metres (9,925 ft) long and has a maximum height of 40 metres (130 ft).
Ethiopia announced on Sunday it had completed the fourth and final phase of filling a reservoir for its huge and controversial hydroelectric power plant on the Blue Nile, a project that Egypt and ...
The Blue Nile and the Atbara both drain to the main Nile River. Ethiopia has no agreement with Egypt or Sudan about the sharing of the river's water. Egypt says that its historic water rights would be violated by dams in Ethiopia and that its water security would be affected. Egypt and Sudan concluded a water sharing treaty in 1959.
At an open-air, riverbank factory where the Blue Nile and White Nile meet in Sudan, Mohamed Ahmed al Ameen and his colleagues mould thousands of bricks every day from mud deposited by summer floods.
During the dry season the natural discharge of the Blue Nile can be as low as 113 m 3 /s (4,000 cu ft/s), although upstream dams regulate the flow of the river. During the wet season, the peak flow of the Blue Nile often exceeds 5,663 m 3 /s (200,000 cu ft/s) in late August (a difference of a factor of 50).
The agreement granted Egypt the right to construct the Aswan High Dam that can store the entire annual Nile River flow of a year. It granted the Sudan to construct the Rosaries Dam on the Blue Nile and, to develop other irrigation and hydroelectric power generation until it fully utilizes its Nile share.