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- W2046979647 abstract "A numerical method is described that may be used to determine the propagation characteristics of weakly non-hydrostatic non-linear free surface waves over a general, bottom topography. In shallow water of constant undisturbed depth, such waves are equivalent to the familiar cnoidal waves characterized by sharp crests and relatively flat troughs. For a certain range of parameters, these propagate without change of form by virtue of the weakly non-hydrostatic balance in the vertical momentum equation. Effectively, this counters the tendency for the non-linearity in a purely hydrostatic theory to lead to a continuously deforming surface wave profile. The realistic representation furnished by cnoidal wave theory of free surface waves in the shallow near-shore zone has led to its utilization in evaluating their propagation characteristics. Nonetheless, the classic analytical theory is inapplicable to the case of wave propagation over a sloping beach or off-shore sand bar topography. Under these conditions, a local change in form of the surface wave profile is anticipated before the waves break and knowing this is required in order to evaluate fully the propagation process. The efficacy of the numerical method is first demonstrated by comparing the solution for water of constant depth with the evaluation of the analytical solution expressed in terms of the Jacobian elliptic function cn. The general method described in the paper is then illustrated by experiments to determine the change in profile of weakly non-hydrostatic non-linear surface waves propagating over bed forms representative of those found in shallow coastal seas. Copyright © 2001 John Wiley & Sons, Ltd." @default.
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- W2046979647 date "2001-01-01" @default.
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- W2046979647 title "A numerical method for the determination of weakly non-hydrostatic non-linear free surface wave propagation" @default.
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- W2046979647 doi "https://doi.org/10.1002/1097-0363(20010215)35:3<299::aid-fld94>3.0.co;2-b" @default.
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