Abstract
The maximum nonbreaking wave height on a horizontal bed is examined through laboratory tests by changing the slope of an approach section from 1/5 to 1/80. As the slope becomes steep, the maximum wave height gradually decreases from the breaker height in water of constant depth: the maximum wave height on the slope 1/80 is about 94% and that on the slope 1/5 is about 80% of the breaker height in water of constant depth. The decrease is induced by the free harmonic waves generated at the junction point of the approach slope and the horizontal bed. Test results also yield a recommendation that the water depth on a horizontal bed be maintained equal to or greater than 10 cm in order to avoid scale effects on wave breaking phenomenon there.
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