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tidal excursion

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tidal excursion [′tīd·əl ik′skər·zhən]
(oceanography)
The net horizontal distance over which a water particle moves during one tidal cycle of flood and ebb; the distances traversed during ebb and flood are rarely equal in nature, since there is usually a layered circulation in an estuary, with a net surface flow in one direction compensated by an opposite flow at depth.


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Period (Pi) and tidal excursion (Ti) were calculated for each constituent from amplitudes (Ai) and frequencies of the constituents as follows: Ti = AiPi/[pi].
The mean current magnitude is dependent on the ratio of the width of the sloping region to the distance that a particle travels in half a tidal cycle (the tidal excursion, approximately 14 kilometers for a tide of 1 meter per second), and is strongest when these two length scales match.
Within the estuary, juvenile white shrimp, in contrast to other penaeid species, are found across a wider range of environmental conditions and habitats (Kutkuhn, 1966) and often make tidal excursions between subtidal and vegetated intertidal habitats to forage (Mayer, 1985; Kneib, 1995; 2000).
 
 
 
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