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RIVER ATBARA (TEKEZZE) BASIN

RIVER ATBARA (TEKEZZE) BASIN. By: Eng. Hayder Yousif Bakhiet Director/ Nile Waters Dept. Ministry of Irrigation & Water Resources Kasala/ March 2007. Basin Description:. Location: Lies between Lat.12 : 30 & 15 : 00 N Long. 35 : 40 & 39:40 E Tributaries:

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RIVER ATBARA (TEKEZZE) BASIN

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  1. RIVER ATBARA (TEKEZZE) BASIN By: Eng. Hayder Yousif Bakhiet Director/ Nile Waters Dept. Ministry of Irrigation & Water Resources Kasala/ March 2007

  2. Basin Description: • Location: • Lies between Lat.12 : 30 & 15 : 00 N Long. 35 : 40 & 39:40 E • Tributaries: • There are many small tributaries and the main two are: Atbara & Setit (Takazze). They joined inside Sudan D/S AlShouak • Area: • Tekazze river flows from the most remote source a distance of 1216 Km to the confluence with river Atbara, covers an area of 68,800 square Km Ethiopia, Sudan & Eriteria • Atbara Basin area above and below the confluence is 31,400 and 43,600 square Km. respectively. • Rainfall: • Rainfall season is shorter than the Blue Nile Basin, average annual is 950 mm (Aug. – Sept.) • It is dry (not completely) from November to May.

  3. The Tagazze lies in a deep ravine a few hundred meters wide at the bottom, shut in by steep rocky hillsides. • The highest point of the Atbara (Takazze) Basin is about 3500 m. • The average level of the catchment area is 1750 m. • For the greater part of the Basin inside Sudan, the Basin is well below the general level of the plain. • The plain width is between 1 to more than 4 Km. and the actual trough is 100 to 300 m. • The slope of River Atbara inside Sudan is 45 cm/km. • The topography is rough and uneven

  4. Land Use & Climate • The climate is arid • Natural vegetation is sparse, with some acacia scrub, scattered bushes & Dom palms. • People along the river relied on livestock and small areas of irrigation land. • Estimated annual sediment load carried by the river Atbara is about 30 million tones.

  5. Available Hydrological Records • Data are available for river Atbara & Setit cover the period 1911 – Date. • Average annual flow of river Setit is 9.500 Milliar cubic meters, river Atbara is 3.0 Milliar cubic meters. • Total annual of river Atbara measured at Alshouak is 12.5 Milliard cubic m.

  6. River Atbara Gauge Hydrograph

  7. River Atbara Flow Hydrograph

  8. Thank U

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