| Country | River | Length (km) | % Correct |
|---|---|---|---|
| Egypt | Nile | 6650 | 99%
|
| Ethiopia | Nile | 6650 | 99%
|
| South Sudan | Nile | 6650 | 99%
|
| Sudan | Nile | 6650 | 99%
|
| Uganda | Nile | 6650 | 99%
|
| D.R. Congo | Congo | 4700 | 95%
|
| Rep. of the Congo | Congo | 4700 | 95%
|
| Zambia | Congo | 4700 | 95%
|
| Guinea | Niger | 4200 | 92%
|
| Mali | Niger | 4200 | 92%
|
| Niger | Niger | 4200 | 92%
|
| Nigeria | Niger | 4200 | 92%
|
| Angola | Zambezi | 3540 | 80%
|
| Botswana | Zambezi | 3540 | 80%
|
| Mozambique | Zambezi | 3540 | 80%
|
| Namibia | Zambezi | 3540 | 80%
|
| Zimbabwe | Zambezi | 3540 | 80%
|
| Lesotho | Orange | 2290 | 65%
|
| South Africa | Orange | 2290 | 65%
|
| Gambia | Gambia | 1120 | 56%
|
| Mauritania | Senegal | 1640 | 48%
|
| Senegal | Senegal | 1640 | 48%
|
| Burkina Faso | Black Volta | 1160 | 34%
|
| Ivory Coast | Black Volta | 1160 | 34%
|
| Ghana | Volta | 1600 | 34%
|
| Central African Republic | Chari | 1400 | 6%
|
| Chad | Chari | 1400 | 6%
|
| Cameroon | Benue | 1083 | 5%
|
| Morocco | Draa | 1100 | 5%
|
| Somalia | Shebeli | 1820 | 5%
|
| Gabon | Ogooué | 1200 | 3%
|
| Tanzania | Ruvuma | 650 | 3%
|
| Kenya | Tana | 708 | 3%
|
| Malawi | Luangwa | 800 | 2%
|
| Benin | Oti | 520 | 2%
|
| Togo | Oti | 520 | 2%
|
| Eritrea | Tekezē | 756 | 2%
|
| Liberia | Cavalla | 515 | 1%
|
| Guinea-Bissau | Geba | 550 | 1%
|
| Eswatini | Komati | 480 | 1%
|
| Equatorial Guinea | Komo | 230 | 1%
|
| Algeria | Majardah | 460 | 1%
|
| Tunisia | Majardah | 460 | 1%
|
| Madagascar | Mangoky | 564 | 1%
|
| Sierra Leone | Rokel | 400 | 1%
|
| Burundi | Ruvubu | 480 | 1%
|
| Rwanda | Ruvubu | 480 | 1%
|
| Cape Verde | Seca | 18 | 1%
|