Abstract
A set of new formulas for prediction of wave transmission coefficient of low-crested structures (LCSs) have been derived by combining Numata's formula (1975) for waves passing through LCSs and Tanaka's diagram (1976) for waves passing over LCSs. The new formulas are applied to various laboratory datasets including 851 data, and the predicted values of transmission coefficient are larger by 0.019 than the measured ones on the average with the standard deviation of the difference of 0.089. The formulas are also applied to the field data of three submerged LCSs at Itoigawa Coast, Niigata West Coast, and Yugawara Coast. The predicted values of the transmission coefficient agree well with the observed values, and the decrease of wave transmission by widening of the crest is appropriately reproduced by the new formulas. The question of model scale effects on wave transmission coefficient is also discussed.
