The rivers of India serve as lifelines for the country, providing numerous benefits ranging from water supply for agriculture ...

Estuaries can also be found where the river meets the sea. Estuaries are tidal and so contain both salt water and fresh water. Mudflats often form around estuaries.

As well as explaining the formation of river features, you also need to be able to describe the physical features of a river and its valley using an Ordnance Survey map.