Geography of Sudan
Area: 2.5 million sq. km. (967,500 sq. mi.); almost the size of continental U.S.
Cities: Capital--Khartoum. Other cities--Port Sudan, Kassala, Kosti, Juba (capital of southern region). No current accurate population statistics available.
Terrain: Generally flat with mountains in east and west. Khartoum is situated at the confluence of the Blue and White Nile Rivers. The southern regions are inundated during the annual floods of the Nile River system (the Suud or swamps).
Climate: Desert and savanna in the north and central regions and tropical in the south.
source: http://www.state.gov