What capital city is nations commercial center and transportation hub due to its location at the point where white nile blue meet?

The capital city that serves as the nation's commercial center and transportation hub due to its location at the point where the White Nile and Blue Nile meet is Khartoum, the capital of Sudan. Khartoum is situated at the confluence of these two major rivers, making it a strategic location for trade and transportation. The city is also the hub for the country's air and rail transport systems, and is home to several major markets, including the Omdurman Souq, one of the largest markets in Africa.