tidal excursion

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Figures 2(a) and 2(b) show Bland-Altman graphics of tidal inspiratory thickness and tidal excursion of the diaphragm, respectively.
Despite lack of consensus about the definition of DD, in general, DD is accepted if TF is less than 20% and if its' tidal excursion is less than 10 mm [21, 24, 26].
In (2), A is tidal excursion and it was found that the value of A was less than 10% variation in the measured quantities of this range; the data presented are for A = 20 m; [omega] is the tidal frequency.
The parameters used for the evaluation need the inclusion of the tidal force parameter [F.sub.tide] = [rho].sub.0] [Aw.sup.2] sin wt, where A is the tidal excursion; in this case A should be less than the channel width (A = 20 m) [[rho].sub.0] = 1000 kg/[m.sup.3]; v = 0.01 [m.sup.2]/s is kinematic viscosity, tidal frequency (w = [w.sub.M2] = 1.4052 x [10.sup.-4] rad/s), and earth's rotational angle velocity [OMEGA] = 7.29 x [10.sup.-5] and [alpha] = [pi]/3 as the constant geostrophic current velocity.
A special surveillance zone of overlapping tidal excursion zones has also been established.
Period (Pi) and tidal excursion (Ti) were calculated for each constituent from amplitudes (Ai) and frequencies of the constituents as follows:
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).