Seabed gouging by ice
http://dbpedia.org/resource/Seabed_gouging_by_ice an entity of type: Election
Lorsqu’une formation de glace flottante (typiquement un iceberg ou un fragment de banquise) dérive dans une zone peu profonde, il arrive que la partie immergée (la quille) de cette glace touche le fond de l’eau. Elle se met alors à racler les sédiments en y laissant un sillon – c’est le phénomène de l’affouillement (Wadhams 2000, Weeks 2010, ch. 13). Si ce phénomène est le plus souvent observé dans les mers et les océans, on le remarque également dans les rivières et les lacs (Noble and Comfort 1982, Grass 1984).
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Seabed gouging by ice is a process that occurs when floating ice features (typically icebergs and sea ice ridges) drift into shallower areas and their keel comes into contact with the seabed. As they keep drifting, they produce long, narrow furrows most often called gouges, or scours. This phenomenon is common in offshore environments where ice is known to exist. Although it also occurs in rivers and lakes, it appears to be better documented from oceans and sea expanses.
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Affouillement des fonds marins par la glace
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Seabed gouging by ice
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1452030
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1118960680
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Lorsqu’une formation de glace flottante (typiquement un iceberg ou un fragment de banquise) dérive dans une zone peu profonde, il arrive que la partie immergée (la quille) de cette glace touche le fond de l’eau. Elle se met alors à racler les sédiments en y laissant un sillon – c’est le phénomène de l’affouillement (Wadhams 2000, Weeks 2010, ch. 13). Si ce phénomène est le plus souvent observé dans les mers et les océans, on le remarque également dans les rivières et les lacs (Noble and Comfort 1982, Grass 1984).
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Seabed gouging by ice is a process that occurs when floating ice features (typically icebergs and sea ice ridges) drift into shallower areas and their keel comes into contact with the seabed. As they keep drifting, they produce long, narrow furrows most often called gouges, or scours. This phenomenon is common in offshore environments where ice is known to exist. Although it also occurs in rivers and lakes, it appears to be better documented from oceans and sea expanses. Seabed scours produced via this mechanism should not be confused with strudel scours. These result from spring run-off water flowing onto the surface of a given sea ice expanse, which eventually drains away through cracks, seal breathing holes, etc. The resulting turbulence is strong enough to carve a depression into the seabed. Seabed scouring by ice should also be distinguished from another scouring mechanism: the erosion of the sediments around a structure due to water currents, a well known issue in ocean engineering and river hydraulics – see bridge scour.
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27204
