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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.
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 ...
The most recent significant crest on the Ohio River was at just below 65 feet on March 5, 1997. That ranked as the ninth-highest crest recorded on the river in Cincinnati. The river crossed the ...
The river finally fell below the major stage on Oct. 30, dropped to the moderate stage on Nov. 7 and is expected to fall below the minor flooding stage today, Nov. 12.
Crest (hydrology), the highest level above a certain datum or reference point that a river will reach in a certain amount of time; Crest (physics), the section of a wave that rises above an undisturbed position; Crest factor, a dimensionless number quantifying the shapes of waves; CREST syndrome, a limited form of the disease scleroderma
The Congaree River is expected to crest at about 31 feet on Monday, which is just short of the nearly 32 feet it reached during the devastating floods of 2015 in the Columbia area.
Depending on context, wave height may be defined in different ways: For a sine wave, the wave height H is twice the amplitude (i.e., the peak-to-peak amplitude): [1] =.; For a periodic wave, it is simply the difference between the maximum and minimum of the surface elevation z = η(x – c p t): [1] = {()} {()}, with c p the phase speed (or propagation speed) of the wave.