بررسي ميزان بالاروي بيشينه امواج نامنظم از موج شكن هاي سكويي

In this paper, the maximum wave run-up levels on berm breakwaters have been investigated. A berm breakwater is kind of reshaping breakwater, which its initial profile is changed to a (S) shaped one after impinging of waves. Therefore, the relations related to wave run-up levels on composite slopes can not be used for this type of sructure. A series of experimental tests were performed in the wave flume of soil conservation and watershed management research center (SCWMRC), the Ministry of Jihad-e-Keshavarzy. The waves were generated using JONSWAP wave spectrum. To investigate the effects of wave and structural parameters on wave run-up levels, three parameters including significant wave height, structure freeboard and storm duration have been selected. Totally 28 tests were carried out and the experimental results were plotted as graphs showing the maximum wave run-up levels versus the surf similarity parmeter and deep water wave steepness. According to the experimental results, the maximum wave run-up levels can be determined as a function of a new parameter, called as non-dimensional reshaping parameter (S). This parameter is a function of significant wave height, structure freeboard, mean wave period, acceleration of gravity and nominal diameter of stones of armour layer.