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Training or entrance training refers to coastal structures built to constrain a river discharging across a littoral coast so that it discharges only where desired. Untrained entrances on sandy coasts tend to move widely and violently to discharge into the ocean, often upsetting those enjoying land nearby.
English: Charting a river - measuring its width at a given location using the intercept theorem. The intercept theorem can be used to determine a distance that cannot be measured directly, such as the width of a river or a lake, the height of tall buildings or similar. The graphic to the right illustrates measuring the width of a river.
The Ocoee Whitewater Center, near Ducktown, Tennessee, United States, was the canoe slalom venue for the 1996 Summer Olympics in Atlanta, [1] [2] and is the only in-river course to be used for Olympic slalom competition. A 1,640 foot (500 m) stretch of the Upper Ocoee River was narrowed by two-thirds to create the drops and eddies needed for a ...
A final 100-foot (30 m) section ends in the river, with or without a drop, depending on the river level. Overall slope adds another seven feet of drop, for a total course drop of 15 feet (4.6 m), plus zero to four feet (0 to 1.2 meters) into the river at the end. The following map shows the arrangement of the visible and submerged features.
The Center's recirculating river is filled with 12 million gallons of water, which is cleaned every 24 hours by a filtration and ultraviolet system. [ 2 ] [ 5 ] The whitewater portion of the river has a total of 3,750 feet (1,140 m) of channel divided between two channels: the Olympic-standard slalom competition channel and the longer ...
The U.S. Army Corps of Engineers developed Inland Electronic Navigation Charts (IENCs) on much of the 8,200 miles of rivers in the U.S. Inland River System. This initiative began in 2001 in response to demand from the inland navigation industry and new capability of technology with small computers and availability of accurate GPS/DGPS positioning.
Stream power is the rate of potential energy loss per unit of channel length. [7] This potential energy is lost moving particles along the stream bed. = where is the stream power, is the density of water, is the gravitational acceleration, is the channel slope, and is the discharge of the stream.
Military airbases may include smaller paved runways known as "assault strips" for practice and training next to larger primary runways. [8] These strips eschew the standard numerical naming convention and instead employ the runway's full three digit heading; examples include Dobbins Air Reserve Base 's Runway 110/290 and Duke Field 's Runway ...