EFFECTS OF SHORT-CRESTED WAVES ON THE SCOURING AROUND THE BREAKWATER

Ming-Chung Lin, Chi-Tung Wu, Yen-Chi Lu, Nai-Kaung Liang

Abstract


The aim of this research is to investigate quaiitatively the influence of short-crested waves on the scouring around the breakwater through mainly some laboratory studies. At first, we succeed to observe clearly in laboratory some sedimentary bed forms such as troughs, holes, triangle bars and longitudinal bars under short-crested wave actions. Then we elucidate the associstion of their formation mechanism with theory of short-crested waves, also indicate its effect on scouring at the toe of breakwaters. In addition, it is shown that the breaking wave height of short-crested waves is certainly higher than that of twodimensional standing waves. Finally we demonstrate some facts of failure of breakwater caused by short-crested wave breaking basing on some field results.

Keywords


breakwater; short crested waves; scour

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