Conversation so far:
where does the blue nile and white nile meet
The Nile River's main tributaries—the White Nile and the Blue Nile—meet in Khartoum, Sudan.
Does the confluence of the White and Blue Nile have a name?
The location where the two Niles meet is known as al-Mogran or al-Muqran.
What is the meaning of the city name Khartoum?
The origin of the word Khartoum is uncertain. One theory argues that it refers to the narrow strip of land extending between the Blue and White Niles.
Are there theories on the name of Khartoum besides the strip of land?
Dinka scholars argue that the name derives from the Dinka words khar-tuom or khier-tuom, translating to place where rivers meet.

Question: What's the city's population?
Self-contained rewrite: What is the population of Khartoum?