The East River is a salt water tidal estuary in New York City. The waterway, which is actually 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 the borough of Queens on Long Island from the Bronx on the North American mainland, and also divides Manhattan from Queens and Brooklyn, which are also on Long Island. Because of its connection to Long Island Sound, it was once also known as the Sound River. The tidal strait changes its direction of flow frequently, 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, although that is no longer the case.
An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island in a river or a lake island may be called an eyot or ait, and a small island off the coast may be called a holm. A grouping of geographically or geologically related islands is called an archipelago, such as the Philippines.
The Mississippi River is the largest river of the United States and the chief river of the second-largest drainage system on the North American continent, second only to the Hudson Bay drainage system. Its source is Lake Itasca in northern Minnesota and it flows generally south for 2,320 miles (3,730 km) to the Mississippi River Delta in the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains all or parts of 32 U.S. states and two Canadian provinces between the Rocky and Appalachian Mountains. The main stem is entirely within the United States; the total drainage basin is 1,151,000 sq mi (2,980,000 km2), of which only about one percent is in Canada. The Mississippi ranks as the fourth-longest and fifteenth-largest river by discharge in the world. The river either borders or passes through the states of Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana.
The Quad Cities is a region of five cities in the U.S. states of Iowa and Illinois: Davenport and Bettendorf in southeastern Iowa, and Rock Island, Moline, and East Moline in northwestern Illinois. These cities are the center of the Quad Cities metropolitan area, which as of 2013 had a population estimate of 383,781 and a CSA population of 474,937, making it the 90th largest CSA in the nation.
The Saint Lawrence River is a large river in the middle latitudes of North America. The Saint Lawrence River flows in a roughly north-easterly direction, connecting the Great Lakes with the Atlantic Ocean and forming the primary drainage outflow of the Great Lakes Basin. It traverses the Canadian provinces of Quebec and Ontario, and is part of the international boundary between Ontario, Canada, and the U.S. state of New York. This river also provides the basis of the commercial Saint Lawrence Seaway.
The River Thames, known alternatively in parts as the Isis, is a river that flows through southern England including London. At 215 miles (346 km), it is the longest river entirely in England and the second longest in the United Kingdom, after the River Severn.
The Niagara River is a river that flows north from Lake Erie to Lake Ontario. It forms part of the border between the province of Ontario in Canada and the state of New York in the United States. There are differing theories as to the origin of the river's name. According to Iroquoian scholar Bruce Trigger, Niagara is derived from the name given to a branch of the locally residing native Neutral Confederacy, who are described as being called the Niagagarega people on several late-17th-century French maps of the area. According to George R. Stewart, it comes from the name of an Iroquois town called Ongniaahra, meaning "point of land cut in two".
Vancouver Island is in the northeastern Pacific Ocean. It is part of the Canadian province of British Columbia. The island is 460 kilometres (290 mi) in length, 100 kilometres (62 mi) in width at its widest point, and 32,134 km2 (12,407 sq mi) in area. It is the largest island on the West Coast of North America.
The Republic of Sakha (Yakutia) (Russian: Республика Саха, tr.Respublika Sakha , IPA: [rʲɪsˈpublʲɪkə sɐˈxa jɪˈkutʲɪjə]; Yakut: Саха Өрөспүүбүлүкэтэ, translit. Sakha Öröspüübülükete, IPA: [saˈxa øɾøsˈpyːbylykete] is a federal Russian republic. It had a population of 958,528 at the 2010 Census, mainly ethnic Yakuts and Russians.
The Gulf of Saint Lawrence is the outlet of the North American Great Lakes via the Saint Lawrence River into the Atlantic Ocean. The gulf is a semienclosed sea, covering an area of about 226,000 square kilometres (87,000 sq mi) and containing about 34,500 cubic kilometres (8,300 cu mi) of water, which results in an average depth of 152 metres (499 ft).
The Río de la Plata —rendered River Plate in British English and the Commonwealth and La Plata River in other English-speaking countries—is the estuary formed by the confluence of the Uruguay and the Paraná rivers. It empties into the Atlantic Ocean, forming a funnel-shaped indentation on the southeastern coastline of South America. Depending on the geographer, the Río de la Plata may be considered a river, an estuary, a gulf or a marginal sea. For those who consider it a river, it is the widest river in the world, with a maximum width of about 220 kilometres (140 mi).
The Fraser River is the longest river within British Columbia, Canada, rising at Fraser Pass near Blackrock Mountain in the Rocky Mountains and flowing for 1,375 kilometres (854 mi), into the Strait of Georgia at the city of Vancouver. It is the 11th longest river in Canada. The river's annual discharge at its mouth is 112 cubic kilometres (27 cu mi) or 3,550 cubic metres per second (125,000 cu ft/s), and it discharges 20 million tons of sediment into the ocean.
The Lena is the easternmost of the three great Siberian rivers that flow into the Arctic Ocean. With a mean annual discharge of 588 cubic kilometers per year, it is the second largest of the Arctic rivers. It is the largest river whose catchment is entirely within the Russian territorial boundaries. Permafrost underlies most of the catchment, with 77% of the catchment containing continuous permafrost.
Narragansett Bay is a bay and estuary on the north side of Rhode Island Sound covering 147 mi2, 120.5 mi2 of which is in Rhode Island. The Bay forms New England's largest estuary, which functions as an expansive natural harbor and includes a small archipelago. Small parts of it extend into Massachusetts.
Boston Harbor is a natural harbor and estuary of Massachusetts Bay, and is located adjacent to the city of Boston, Massachusetts. It is home to the Port of Boston, a major shipping facility in the northeastern United States.
The Ohio River Islands National Wildlife Refuge (ORINWR) is a National Wildlife Refuge (NWR) in non-contiguous sites consisting of islands along 392 miles (631 km) of the Ohio River, primarily in the U.S. state of West Virginia. There are also a two of islands upstream in Beaver County, Pennsylvania and a two downstream in Lewis County, Kentucky. Going downstream, the refuge is currently located in parts of these counties: Beaver, Brooke, Ohio, Marshall, Wetzel, Tyler, Pleasants, Wood, Jackson, Mason, and Lewis. All counties are in West Virginia, with the exceptions of Beaver, which is in Pennsylvania, and Lewis, which is in Kentucky. The ORINWR was established in 1990 and consists of 3,354 acres (13.57 km2) of land and underwater habitat on 22 islands and four mainland properties. The refuge headquarters and visitors center is located in Williamstown, West Virginia. Prior to its establishment, West Virginia was the only state of the United States without a NWR.
In the United States, a river mile is a measure of distance in miles along a river from its mouth. River mile numbers begin at zero and increase further upstream. The corresponding metric unit using kilometers is the river kilometer. They are analogous to vehicle roadway mile markers, except that river miles are rarely marked on the physical river; instead they are marked on navigation charts, and topographic maps. Riverfront properties are sometimes partially legally described by their river mile.
The Danube, known by various names in other languages, is Europe's second longest river, after the Volga. It is located in Central and Eastern Europe.
