A tidal strait is a strait through which a tidal current flows. Tidal currents are usually unidirectional but sometimes are bidirectional. Tidal straits, though they are narrow seaways, are technically not rivers. They are frequently of tectonic origin. In them, currents develop because of elevation differences between the water basins at both ends. Tidal straits can connect seas and oceans, as well as estuarine zones.
Tides sometimes allow sediments to collect in tidal straits.
The Arthur Kill (sometimes referred to as the Staten Island Sound) is a tidal strait in the New York–New Jersey Harbor Estuary between Staten Island (also known as Richmond County), New York, and Union and Middlesex counties, New Jersey. It is a major navigational channel of the Port of New York and New Jersey.
The Johor Strait (also known as the Tebrau Strait, Straits of Johor, Selat Johor, Selat Tebrau, and Tebrau Reach, also spelled Johore Strait) is an international tidal strait in Southeast Asia, between Singapore and Peninsular Malaysia.
The East River is a saltwater tidal estuary or strait in New York City. The waterway, which is not a river despite its name, connects Upper New York Bay on its south end to Long Island Sound on its north end. It separates Long Island, with the boroughs of Brooklyn and Queens, from Manhattan Island, and from the Bronx on the North American mainland.
Because of its connection to Long Island Sound, the East River was once also known as the Sound River. The tidal strait changes its direction of flow regularly, and is subject to strong fluctuations in its current, which are accentuated by its narrowness and variety of depths. The waterway is navigable for its entire length of 16 miles (26 km), and was historically the center of maritime activities in the city.
40°36′48″N 74°02′53″W / 40.61333°N 74.04806°W
The Narrows is the tidal strait separating the boroughs of Staten Island and Brooklyn in New York City. It connects the Upper New York Bay and Lower New York Bay (of larger New York Bay) and forms the principal channel by which the Hudson River flowing south from upstate New York and the New England regions, empties into the Atlantic Ocean. It has long been considered to be the maritime gateway to New York City and the Northeastern United States on the East Coast of North America, and historically has been one of the most important entrances into the seaport harbors of the Port of New York and New Jersey.
The Harlem River is an 8-mile (13 km) tidal strait in New York City, flowing between the Hudson River and the East River and separating the island of Manhattan from the Bronx on the United States mainland.
The northern stretch, also called the Spuyten Duyvil ("spewing devil") Creek, has been significantly altered for navigation purposes. Originally it curved around the north of Marble Hill, but in 1895 the Harlem Ship Canal was dug between Manhattan and Marble Hill, and in 1914 the original course was filled in.
40°38′38″N 74°07′12″W / 40.644°N 74.120°W
The Kill Van Kull is a tidal strait between Staten Island, New York, and Bayonne, New Jersey, in the United States. It is approximately 3 miles (4.8 km) long and 1,000 feet (305 m) wide and connects Newark Bay with Upper New York Bay. The Robbins Reef Light is at the eastern end of the Kill, and Bergen Point marks its western end. It is spanned by the Bayonne Bridge and is one of the most heavily traveled waterways in the Port of New York and New Jersey.
Hell Gate is a narrow tidal strait in the East River in New York City. It separates Astoria, Queens, from Randall's and Wards Islands in Manhattan.