Journal
CONTINENTAL SHELF RESEARCH
Volume 22, Issue 11-13, Pages 1887-1895Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0278-4343(02)00044-4
Keywords
estuarics; intertidal mudflats; intertidal sedimentation; mathematical models; morphodynamics
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We describe a mathematical model of the sediment transport resulting from cross-shore tidal currents on an intertidal mudflat. The model is integrated numerically to determine the long-term (equilibrium) behaviour of the morphodynamic system, and to investigate how the morphology of the flats depends on tidal range and sediment supply. Under a sinusoidal tide, the equilibrium flat is approximately linear below mean sea level (MSL) and convex above MSL, and advances seawards over long timescales. The cross-shore width of the flat is independent of tidal range, and increases with increasing sediment supply. Tidal asymmetry (flood- or ebb-dominance) leads to a steeper flat, and ebb-dominance can cause the flat to retreat landwards in the long term. Under a spring-neap tidal cycle, the shape of the equilibrium profile is very similar to that for a fixed tidal range, but the rate of accretion is significantly reduced. (C) 2002 Elsevier Science Ltd. All rights reserved.
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