Kogin Nilu, wanda yake da tsawon kilomita 6,650, "kogin kasa da kasa " ne kamar yadda rafin ruwansa ya rufe kasashe goma sha ɗaya, wato, Tanzania, Uganda, Rwanda, Burundi, Jamhuriyar Demokradiyyar Kongo, Habasha, Eritrea, Sudan ta Kudu, Jamhuriyar Sudan ta Kudu da Masar. Musamman, Nilu shine ruwan farko na Masar da Sudan. Kogin Nilu yana da manyan rassa guda biyu, White Nile da Blue Nile. Ana ɗaukar White Nile a matsayin babban kogin farko na arewacin Afirka kuma mafi yawan kogin da aka yi jayayya a duniya (gwamnatin Brazil ta yi iƙirarin cewa Kogin Amazon ya fi Nile). Kogin Nilu, wanda yake kusan kilomita 6,650 (4,130 mi) mai tsawo, "kogin kasa da kasa" ne kamar yadda rafin ruwansa ya rufe kasashe goma sha ɗaya, wato, Tanzania, Uganda, Rwanda, Burundi, Jamhuriyar Demokradiyyar Kongo, Habasha, Eritrea, Sudan ta Kudu, Jamhuriyar Sudan da Masar.
Ƙasar Blue Nile