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Encyclopedia > Channel (geography)

In physical geography, a channel is the physical confine of a river, slough or ocean strait consisting of a bed and banks. See Stream bed. True-color image of the Earths surface and atmosphere Physical geography (also know as geosystems or physiography) is a subfield of geography that focuses on the systematic study of patterns and processes within the hydrosphere, biosphere, atmosphere, and lithosphere. ... This bridge across the Danube River links Hungary with Slovakia. ... The term slough (in the UK, pronounced to rhyme with cow; In the US, pronounced slew) has several meanings related to wetland or aquatic features that seem to derive from local experience. ... Simplified diagram A strait is a narrow channel of water that connects two larger bodies of water, and thus lies between two land masses. ... The bed of this stream is made up of rocks, some very rounded (having had a longer life in the stream) and some not. ...

A channel is also the natural or man-made deeper course through a reef, bar, bay, or any shallow body of water. It is especially used as a Nautical term to mean the dredged and marked (See: Buoy) lane of safe travel which a cognizant governmental entity guarantees to have a minimum depth across its specified minimum width to all vessels transiting a body of water. The term not only includes the deep-dredged ship-navigable parts of an estuary or river leading to port facilities, but also to lesser channels accessing boat port-facilities such as marinas. When dredged channels traverse bay mud or sandy bottoms, repeated dredging is often necessary because of the unstable subsequent movement of benthic soils. [1] A reef surrounding an islet. ... Sand bars in the Mississippi River at Arkansas and Mississippi A bar is a linear shoaling landform feature within a body of water. ... In geography, a bay or gulf is a collection of water that is surrounded by land on three sides. ... A list of nautical terms; some remain current, many date from the 17th-19th century. ... A sea lion on navigational buoy #14 in San Diego Harbor Green can #11 near the mouth of the Saugatuck river. ... Italian Full rigged ship Amerigo Vespucci in New York Harbor, 1976 A ship is a large watercraft capable of deep water navigation. ... // For other uses, see Dredge (disambiguation). ... A river or canal is Navigatable if the water is deep and wide enough, and not flowing too fast. ... Rio de la Plata estuary Wikimedia Commons has media related to: Estuaries An estuary is a semi-enclosed coastal body of water with one or more rivers or streams flowing into it, and with a free connection to the open sea[1]. Estuaries are often associated with high rates of... Seaport, a painting by Claude Lorrain, 1638 The Port of Wellington at night. ... A boat is a watercraft designed to float on, and provide transport over, water. ... Seaport, a painting by Claude Lorrain, 1638 The Port of Wellington at night. ... A small marina at Brixham, Devon, England. ... Richardson Bay mudflats of are exposed layers of bay mud Bay mud consists of thick deposits of soft, unconsolidated silty clay, which is saturated with water; these soil layers are situated at the bottom of certain estuaries, which are normally in temperate regions that have experienced cyclical glacial cycles. ...

Responsibility for monitoring navigability conditions of navigation channels to various port facilities varies, and the actual maintenance work is frequently performed by a third party. Storms, sea-states, flooding, and seasonal sedimentation adversely affect navigability. In the United States, navigation channels are monitored and maintained by the United States Army Corps of Engineers (USACE), although dredging operations are often carried out by private contractors (under USACE supervision). USACE also monitors water quality and some remediation. This was first established under the Rivers and Harbors Act of 1899 and modified under acts of 1913, 1935, and 1938, which are contained in chapter 33 of the US Code, "Navigation and Navigable Waters." For example, the USACE developed the Intracoastal Waterway, and has the Mississippi Valley Division responsible for the Mississippi River from the Gulf to Cairo, Illinois, the North Atlantic Division for New York Harbor and Port of Boston, and the South Pacific Division for Port of Los Angeles and Port of Long Beach. Waterways policing as well as some emergency spill response falls under United States Coast Guard jurisdiction, including inland channels serving ports like Saint Louis hundreds of miles from any coast. The various state or local governments maintain lesser channels, for example former Erie Canal. The USACE gold castle insignia, worn by officers of the Corps The United States Army Corps of Engineers, or USACE, is made up of some 34,600 civilian and 650 military men and women. ... The Rivers and Harbors Act of 1899 is the oldest federal environmental law. ... Tug and barge on the Gulf Intracoastal Waterway Navigation on the Gulf Intracoastal Waterway (GIWW), where it intersects with Bayou Perot, in the vicinity of New Orleans The Intracoastal Waterway is a 4,800-km (3,000-mile) recreational and commercial waterway along the Atlantic and Gulf coasts of the... The United States Army Corps of Engineers Mississippi Valley Division (MVD) and the complementary Mississippi River Commission (MRC) are responsible for maintaining the Mississippi River as a navigable waterway while preventing flooding. ... The Mississippi River, derived from the old Ojibwe word misi-ziibi meaning great river (gichi-ziibi big river at its headwaters), is the second-longest named river in North America, with a length of 2320 miles (3733 km) from Lake Itasca to the Gulf of Mexico. ... Cairo is a city in Alexander County, Illinois in the United States. ... The North Atlantic Division of the U.S. Army Corps of Engineers is a Regional Business Center made up of nearly 3900 team members in six districts and a Division Headquarters. ... New York Harbor, a geographic term, refers collectively to the rivers, bays, and tidal estuaries near the mouth of the Hudson River in the vicinity of New York City. ... Long Wharf in waterfront downtown Boston was once the main commercial wharf of the port, but is now used by ferries and cruise boats. ... The United States Army Corps of Engineers South Pacific Division (SPD) is an Army organization providing civil works and military water resource services and infrastructure and supports economically viable and environmentally sustainable watershed management and water resources development in California, Arizona, Nevada, Utah and New Mexico and is also responsible... General Information Founded December 9, 1907 Coordinates  - Latitude  - Longitude 33º4239 N 118º1459 W Area  - Total  - Land  - Water 7500 acres 4200 acres 3300 acres Available Berths 270 Vessel Arrivals 2,813 (FY 2004) Annual container volume 7. ... The Port of Long Beach is the second busiest seaport in the United States and the tenth busiest port in the world. ... The United States Coast Guard (USCG) is a branch of the United States armed forces involved in maritime law enforcement, mariner assistance, search and rescue, and national defense. ... Seaport, a painting by Claude Lorrain, 1638 The Port of Wellington at night. ... This article or section does not adequately cite its references or sources. ... The Erie Canal (currently part of the New York State Canal System) is a canal in New York State, United States, that runs from the Hudson River to Lake Erie, connecting the Great Lakes with the Atlantic Ocean. ...

In a larger nautical context, as a geographical place name, the term channel is another word for strait, which is defined as a relatively narrow body of water that connects two larger bodies of water. In this nautical context, the terms strait, channel, sound, and passage are synonymous and usually interchangeable. For example, in an archipelago, the water between islands is typically called a channel or passage. The English Channel is the strait between England and France. Simplified diagram A strait is a narrow channel of water that connects two larger bodies of water, and thus lies between two land masses. ... This article is in need of attention. ... The Mergui Archipelago An archipelago is a landform which consists of a chain or cluster of islands. ... Satellite view of the English Channel The English Channel (French: (IPA: ), the sleeve; Dutch: Het Kanaal) is the part of the Atlantic Ocean that separates the island of Great Britain from northern France and joins the North Sea to the Atlantic. ... Motto (French) God and my right Anthem God Save the King (Queen) England() – on the European continent() – in the United Kingdom() Capital (and largest city) London (de facto) Official languages English (de facto) Government Constitutional monarchy  -  Queen Queen Elizabeth II  -  Prime Minister Tony Blair MP Unification  -  by Athelstan 967  Area...


  1. ^ History of the Waterways of the Atlantic Coast of the United States, USACE, January 1983

United States Army Corps of Engineers logo The United States Army Corps of Engineers, or USACE, is made up of some 34,600 civilian and 650 military men and women. ...

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