For 10 points, name this longest river in the world which drains into the Mediterranean Sea through its Delta in Egypt.
The spread of the South American water hyacinth further backed up this river in its swampy Al-Sudd region. The farthest source of this river is the Kagera River, and it was called the Black River in ancient times due to the sediments it carried when it flooded. This river is dammed by the Aswan High Dam, creating Lake Nasser, and its watershed ends at the Ethiopian Plateau, where one of its two "colored" tributaries begins. Those tributaries, the White and the Blue, join in the Sudan. For 10 points, name this longest river in the world which drains into the Mediterranean Sea through its Delta in Egypt.
The spread of the South American water hyacinth further backed up this river in its swampy Al-Sudd region.
Nile River