River Yamuna, the largest tributary of river Ganga, is the most threatened river system in the country. It faces over abstraction of water and increasing pollution load (municipal and industrial) throughout its course. The river has no worthwhile perennial tributary along its most threatened 600km stretch--from Hathnikund (Haryana) to Etawah (Uttar Pradesh)--where it is revived after meeting with river Chambal. The Somb-Thapana catchment is a tributary feeding the Yamuna.
India Water Portal is an Arghyam initiative