Estuary



An estuary is the place where the mouth of a river enters the sea, causing fresh water and salt water to blend. It a semienclosed coastal body of water with one or more rivers or streams. Estuaries are wetlands that are productive ecosystems.

Tides
Tidal ebb and flow occur in an estuary and it can be said that an estuary is the wide lower course of a river where its stream meets the tides. The delta of the Ganges River in India is an example and takes on the form of an estuary with numerous tidal inlets.