• estimating wave-induced bottom velocity in the vicinity of reflective structures

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 706
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the undertow, the seaward return flow of wave mass transport, induces a seaward stress on the bottom sediment particle. a nonlinear theory equation is presented for estimating the vertical and horizontal distribution of undertow in the surf zone for reflective beaches. the present model is a modification of the original model presented by okayasu et al., (1990) for natural, non-reflective beaches wherein the wave set up, radiation stress and mass flux due to breaking waves are modified as described by mehrdad and neshaei (2004) to include the effect of partially reflected waves. furthermore, the nonlinearity of waves is provided by fenton's fourier series theory and the wave-current interaction in calculation of undertow is applied. also, the nonlinear mass drift of the incident wave is included in the proposed model. the results of experimental investigation and model development show that existence of reflective conditions on beaches results in a reduction in the magnitude of undertow and modifies its distribution across the beach profile.

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