Narragansett Bay is an estuary in New England, and the heart of the Narragansett Bay watershed. An estuary is a body of water where rivers meet the sea.
By definition, a watershed is the land area that drains into rivers, streams, lakes or estuaries. Some 40% of the Narragansett Bay watershed is in Rhode Island, but over 60% of the watershed is actually in Massachusetts.
The maps below display the major basins that make up the Narragansett Bay watershed and the bathymetry of the Narragansett Bay estuary.