Three Himalayan river systems are :
(I) The Indus river system
(ii) The Ganga river system
(iii) The Brahmaputra river system.
Tributaries :
(i) Indus river system – Satluj, Beas, Ravi
(ii) Ganga river system – Yamuna,Ghaghara, Gandak
(iii) Brahmaputra river system – Dibang, Lohit, Kenula.
