| Summary: | This thesis describes an investigation of the performance of vertical single and double
wave barriers. An experimental investigation of the reflection and transmission of regular
and irregular waves was carried out. Measurements from three wave probes were used to
analyze the reflection coefficient using a least squares method. In the tests, the wave
period, wave height, barrier immersion depth, and barrier porosity were varied in order to
determine the relationship between the reflection and transmission coefficients and
parameters describing incident wave and barrier characteristics, such as the immersion
depth, the distance between barriers and the barrier porosity. The results show that the
reflection and transmission coefficients are functions of wave length, immersion depth,
distance between barriers and porosity. The frequency dependent transmission coefficient
obtained from irregular wave tests was compared with those obtained in regular wave
tests. Single barrier and double barrier results have also been compared with predictions
based on available theoretical methods. The performance characteristics of single and
double barriers have been compared, and it is found that there is a significant reduction in
wave transmission in the case of double barrier, without a corresponding increase in wave
reflection. === Applied Science, Faculty of === Civil Engineering, Department of === Graduate
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