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In hydrology, crest is the highest level above a certain point (the datum point, or reference point) that a river will reach in a certain amount of time. This term is usually limited to a flooding event and from ground level.
the river will rise above flood stage around 4 am tuesday. the river will crest near 8.2 feet around 7 am tuesday. the river will fall below flood stage around 12 pm tuesday. at 8.0 feet...flood stage is reached. minor flooding begins. suwanee creek park begins to flood. this crest compares to a previous crest of 8.2 feet on sep 25 1997.
Example graph of stream stages showing Action Stage, Flood Stage, Moderate Stage, Major Stage, and Record Stage on a river. Flood stage is the water level, as read by a stream gauge or tide gauge, for a body of water at a particular location, measured from the level at which a body of water threatens lives, property, commerce, or travel. [1]
A crest is a point on a surface wave where the displacement of the medium is at a maximum. A trough is the opposite of a crest, so the minimum or lowest point of the wave. When the crests and troughs of two sine waves of equal amplitude and frequency intersect or collide, while being in phase with each other, the result is called constructive ...
Since most of these devices operate by controlling the water surface elevation being stored or routed, they are also known as crest gates. In the case of flood bypass systems, floodgates sometimes are also used to lower the water levels in a main river or canal channels by allowing more water to flow into a flood bypass or detention basin when ...
A fixed-crest dam is a concrete barrier across a river. [46] Fixed-crest dams are designed to maintain depth in the channel for navigation. [47] They pose risks to boaters who may travel over them, as they are hard to spot from the water and create induced currents that are difficult to escape. [48]
The lowest average daily flow ever recorded at the same location was 601.0 cubic feet (17.02 m 3) /s in September 1966 [2] The highest crest of the Potomac ever registered at Little Falls was 28.10 ft, on March 19, 1936; [43] [28] however, the most damaging flood to affect Washington, DC and its metropolitan area was that of October 1942. [44]
The Pawtuxet River (PAH-tucks-it [1]), also known as the Pawtuxet River Main Stem and the Lower Pawtuxet, is a river in the U.S. state of Rhode Island. It flows 12.3 miles (19.8 km) [ 2 ] and empties into the upper Narragansett Bay of the Atlantic Ocean.