| Clue | Source | Date |
|---|---|---|
| Drainage area occupying around 10 per cent of Africa's area | The Times Specialist Sunday | 25 Feb 2024 |
| River drainage region that covers 11 African countries | LA Times Daily | 02 Jan 2018 |
| River drainage region that covers 11 African countries | ||
| River drainage region that covers 11 African countries | ||
| About 10% of Africa | Thomas Joseph | 13 Dec 2016 |
| African region totaling 1.2 million square miles | ||
| About 10% of Africa | ||
| Drainage area of the world's longest river | ||
| Region that includes Burundi |