The Ganga river System :
Catchment are is 26 % of geographical area of the country.
National river in 2008
Alaknanda and Bhagirathi are the two head streams of Ganga.
Bhagirathi--Gangothri glacier
Alaknanda – Satopanth Glacier.
Confluence at Devaprayag where onward it is known as Ganga.
At Haridwar it enters the Plain.
Length: UP>WB>Bihar.