What does antidune mean?

Definitions for antidune
an·tidune

This dictionary definitions page includes all the possible meanings, example usage and translations of the word antidune.


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Wiktionary

  1. antidunenoun

    A bedform found in fluvial environments, opposing the direction of flow.

Wikidata

  1. Antidune

    An antidune is a bedform found in fluvial environments. It occurs where there is supercritical flow, meaning that the Froude number is greater than 1.0 or the flow velocity exceeds the wave velocity; this is also known as upper flow regime. In antidunes, sediment is deposited on the stoss side and eroded from the lee side, opposite lower flow regime bedforms. As a result, antidunes migrate in an upstream direction, counter to the current flow. Antidunes are called in-phase bedforms, meaning that the water surface elevation mimics the bed elevation; this is due to the supercritical flow regime. Antidune bedforms evolve rapidly, growing in amplitude as they migrate upstream. The resultant wave at the water's surface also increases in amplitude. When that wave becomes unstable, breaks and washes downstream, most of the antidune bedform is destroyed.

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Numerology

  1. Chaldean Numerology

    The numerical value of antidune in Chaldean Numerology is: 4

  2. Pythagorean Numerology

    The numerical value of antidune in Pythagorean Numerology is: 7

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"antidune." Definitions.net. STANDS4 LLC, 2024. Web. 28 Mar. 2024. <https://www.definitions.net/definition/antidune>.

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