ABSTRACT
The major portion of the flow in the River Nile at Aswan comes from the Ethiopian Highlands via the Blue Nile. Over 50 milliards (km3) annually from the Blue Nile swell the total river flow past Khartoum to 77 milliards, downstream of the junction with the White Nile. Further downstream, after Atbara where the last tributary from Sudan enters the main river, the annual flow reaches 84 milliards before it crosses the Egyptian border.
