A river along with a network of tributaries and distributaries is called a river system.
Characteristics:
(i) River Indus rises in Tibet near Mansarovar lake.
(ii) Its total length is 2,900 km and is one of the longest rivers of the world.
(iii) Majority flows through Pakistan and helps in various agricultural activities.
(iv) Tributaries of Indus are Nubra, Hunza, Satluj, Beas, Ravi, Chenab, Jhelum.