WAVE REFLECTION AND OVERWASH OF DUNES
WAVE REFLECTION AND OVERWASH OF DUNES
复制标题
海浪反射和沙丘淹没
DOI：
10.1061/(asce)0733-950x(1996)122:3(150
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
M. Hancock
中科院分区：
文献类型：
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作者：
N. Kobayashi;Y. Tega;M. Hancock
共进行了7次试验，共72次，测量了沙丘的波浪反射、过顶和冲过。实测的反射系数和过顶率与沿海结构的经验公式进行了比较。假定反射的等效均匀斜率为静水岸线的滩坡。假设溢顶的等效均匀坡度为沙丘峰顶至水深等于有效波高点之间的总坡度。假定海岸构造的趾部深度与海滩上破碎带直接向海的水深相对应。然后用这些调整的公式来预测测量的反射系数和过顶率的数量级。此外，在这些小规模试验中，测得过冲流中的平均体积砂浓度约为0.04。
Seven tests consisting of 72 runs were conduced to measure wave reflection, overtopping, and overwash of dunes. The measured reflection coefficients and overtopping rates are compared with the empirical formulas developed for coastal structures. The equivalent uniform slope for reflection is assumed to be the beach slope at the still water shoreline. The equivalent uniform slope for overtopping is assumed to be the overall slope between the dune crest and the point where the water depth equals the significant wave height. The toe depth of the coastal structure is assumed to correspond to the water depth immediately seaward of the breaker zone on the beach. The formulas with these adjustments are then shown to predict the order of magnitude of the measured reflection coefficients and overtopping rates. Furthermore, the average volumetric sand concentration in the overwash flow was measured to be approximately 0.04 for these small-scale tests.