Halfa Dughaym in an otherwise fairly arid region and to resettle the Sudanese population driven away by the Aswan High Dam (Sad al-Aali) in Egypt, which flooded 500 km of the Nile Valley in southern Egypt and northern Sudan. Construction on a $1.9 billion twin dam project about 20 km upstream from the confluence of the Upper Atbara and Setit rivers, the Rumela and Burdana dams, began in 2011 and was inaugurated by President Omar al-Bashir in February 2017. Hydrology Average monthly flow (1912–1982) of the Atbarah measured approximately 25 km upstream of its mouth, measured in m3/s: See also List of rivers of Ethiopia List of rivers of Sudan References External links Maps of Ethiopia - Perry–Castañeda Library Map Collection, University of Texas International rivers of Africa Rivers of Ethiopia Rivers of Sudan Nile basin Tributaries of the Nile Articles which contain graphical timelines