Ninigret is a coastal

lagoon A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses. Lagoons are commonly divided into ''coastal lagoons'' (or ''barrier lagoons'') ...

in Charlestown,

Rhode Island Rhode Island (, like ''road'') is a state in the New England region of the Northeastern United States. It is the smallest U.S. state by area and the seventh-least populous, with slightly fewer than 1.1 million residents as of 2020, but it ...

, in the United States, located at . It is the largest of the nine lagoons, or "salt ponds", in southern Rhode Island. It is utilized for recreational activities, as well as oyster and

quahog The hard clam (''Mercenaria mercenaria''), also known as the round clam, hard-shell (or hard-shelled) clam, or the quahog, is an edible marine bivalve mollusk that is native to the eastern shores of North America and Central America from Prince E ...

harvesting. Found along its shores are "extensive" archaeological remains. Ninigret Pond, like others in the region, was "formed after the recession of the glaciers 12,000 years ago". The pond is situated on low-lying ground, and as such, it is considered particularly vulnerable to storm surge flooding. It is connected to Green Hill Pond via a small channel. The pond is located within the

Ninigret National Wildlife Refuge The Ninigret National Wildlife Refuge is a National Wildlife Refuge situated along the shore of Ninigret Pond. It is characterized by salt marshes, kettle ponds, freshwater wetlands, maritime shrub lands, and forests, and it is seasonally inhabit ...

. Both are named for

Ninigret Ninigret (also known as Juanemo according to Roger Williams) (c. 1610 This source confirms 1662 as the date of his land sales.-1677 This source suggests a date of 1667 for his land sales and a 1647 war against the Mohegans.) was a sachem of the ea ...

, a 17th-century

sachem Sachems and sagamores are paramount chiefs among the Algonquians or other Native American tribes of northeastern North America, including the Iroquois. The two words are anglicizations of cognate terms (c. 1622) from different Eastern Al ...

of the eastern

Niantic Niantic may refer to: * Niantic people, tribe of American Indians * Niantic, Inc., mobile app developer known for the mobile games ''Ingress'' and ''Pokémon Go'' Ships * ''Niantic'' (whaling vessel), relic of San Francisco Gold Rush *USS ''Ni ...

aboriginal American tribe.

Watershed and restoration

According to information compiled by the Rhode Island Sea Grant program, Ninigret Pond's watershed covers , of which is occupied by water; Ninigret Pond itself has a surface area of , while other, smaller bodies of water account for the other . Averaging deep, Ninigret Pond has a salinity level of 24

parts per thousand In science and engineering, the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities, e.g. mole fraction or mass fraction. Since these fractions are quantity-per-quantity measures, they ...

. The pond receives: about 1,927,399,642 gallons of precipitation per year; 8,974,614–12,376,282 gallons of groundwater flow per day; and 1,881,774–4,849,186 of river and stream flow per day. It is permanently connected to the

Block Island Sound Block Island Sound is a strait in the open Atlantic Ocean, approximately wide, separating Block Island from the coast of mainland Rhode Island. On the west, it extends to Montauk Point on the eastern tip of Long Island, as well as Plum Is ...

by a constructed breachway. As a result of heavy development along the eastern shore, there are indications that water quality is degrading; however, restoration efforts are in place.

Eelgrass Eelgrass is a common name for several plants and may refer to: * ''Zostera'', marine eelgrass * ''Vallisneria'', freshwater eelgrass {{Short pages monitor