Tributaries of the Niger traverse the western portion of the country, the most noteworthy being the Gulbin Kebbi or Sokoto river and the Kaduna, which flows through a valley not more than 500 ft.
above Lokoja, the river terminus of the Northern Nigeria railway; Egga, Mureji (at the Kaduna confluence), Jebba and Bussa.
The administrative headquarters of Northern Nigeria are at Zungeru, on the Kaduna river, in 6° 09' 40" E., 9 0 48' 32" N.
The Kaduna from its confluence with the Niger can be ascended by steamer 50 m.
This was selected on a branch of the Kaduna river in the south-western corner of the province of Zaria, at a place of which the native name of Zungeru was retained.