The Giba is a river of northern Ethiopia. It starts at the confluence of Genfel and Sulluh and flows westward to the Tekezé River. Future Lake Giba will occupy the plain where the Sulluh, Genfel and Agula'i Rivers meet, and hence be the future source of Giba River.

The Genfel is a river of northern Ethiopia. Rising on the foot of the Atsbi horst at 2,253 metres above sea level, it flows southwestward to Giba River which empties finally in the Tekezé River. Future Lake Giba will occupy the plain where Sulluh, Genfel and Agula'i Rivers meet.