Nanda Ghunti Glacier flowing west to east and joins Ronti Glacier that flows south to north. both the glacier drains down through Ronti Gad and joins Dhauli Ganga that later joins Alaknanda at Vishnu Prayag. Alaknanda River is one of the main tributaries of river Ganga that later joins Bhagirathi River the other main tributaries of river Ganga at Devprayag and became Ganga there after.