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A seiche (/ s eɪ ʃ / SAYSH) is a standing wave in an enclosed or partially enclosed body of water. Seiches and seiche-related phenomena have been observed on lakes, reservoirs, swimming pools, bays, harbors, caves, and seas. The key requirement for formation of a seiche is that the body of water be at least partially bounded, allowing the ...
Seiche warning CFW – Rapid, large fluctuations in water level in the Great Lakes (similar to the sloshing in a bath tub) caused by storms or high winds, resulting in both lakeshore flooding and critically low water levels at different times. Issued as a lakeshore flood warning with reference of being a seiche warning.
Witnessing a seiche is like looking at the storm surge and waves from a hurricane. When seiches occur during the winter, they add heavy snow and ice into the mix on top of the flood threat.
Seiche may refer to: Seiche, a standing wave in a body of water; Seiche (river), a river in Brittany, France, which is a tributary of the Vilaine; seiche, a French term for a cuttlefish or bobtail squid. Seiches may refer to: Seiches-sur-le-Loir, a commune in the Maine-et-Loire department of France.
The long and narrow rectangular shape of the Adriatic Sea is the source of an oscillating water motion (called seiche) along the basin's minor axis. [5]The principal oscillation, which has a period of 21 hours and 30 minutes and an amplitude around 0.5 meters at the axis' extremities, supplements the natural tidal cycle, so that the Adriatic Sea has much more extreme tidal events than the rest ...
The lake has a natural seiche rhythm of eleven minutes. The seiche effect normally is only about 3 ⁄ 4 inch (1.9 cm) but can be greatly amplified by earth movement, winds, and atmospheric pressure changes. Because of its great depth, the lake as a whole does not completely freeze in winter, but an ice sheet covering between 10% and 90% of the ...
Different kinds of Secchi disks. A marine style on the left and the freshwater version on the right. The Secchi depth is reached when the reflectance equals the intensity of light backscattered from the water. 1.7 divided into this depth in metres yields an attenuation coefficient (also called an extinction coefficient), for the available light averaged over the Secchi disk depth.
Queenstown is on the northern shore of the lake close to the eastern end of its middle section. It has a seiche period of 26.7 minutes which, in Queenstown Bay, causes the water level to rise and fall some 200 millimetres (8 in). [3] Lake Wakatipu is known for its scenery and is surrounded by mountains.