Results
Effects of Wave Frequency
As can be seen in the figures below, the calculated wave height values are consistently lower than the values that were measured during the experiment. This trend can be observed in all cases for both short and long breakwaters as well as for both wave frequencies.
Additionally, there is a greater difference between the observed and calculated values in cases of the lower frequency (T=1.82s).
Effects of Breakwater Length
The two figures below show a clear indication that the longer breakwater is more effective at reducing wave height. In all points measured after the breakwater (3-6) showed that wave height was decreased more than the short breakwater. Sample point 2, however showed an increased wave height. This is the point that was right offshore from the opening of the breakwater. The reason for the increased wave height is because of the conditions of the experiment. Since the wave tank was narrow and was even further narrowed by the addition of the breakwaters, the water was forced through a small opening and therefore increase the amplitude of the wave and the entrance of the small opening.
Kd Values
Through a comparison of the calculated and observed values of Kd, it was determined that the calculated Kd values were a close match with the observed Kd values. When comparing the short and long break waters with the lower frequency waves, it appeared that there was a greater disparity between the calculated and observed Kd values with the calculated values being lower than the observed values.
