An Alternative Approach for Laboratory Wave Recording Using Pressure Transducers

In this study, an alternative approach for recording water level fluctuation in a two-dimensional wave flume based on using pressure transducers is investigated. Two sets of simultaneous measurements were carried out at the same place using a water level meter and a pressure sensor. Spectral analysis is applied to find conversion coefficient between these sets of data. The conversion coefficients attained by this method are found to be considerably different from those obtained from linear wave theory.  It is also concluded that the deployed sensors are accurate to record the oscillation amplitude of harmonics with maximum 2 Hz frequencies. These sensors can record the simulated natural young seas with periods greater than 3s in full scale, supposing a length scale of 25 would be applied. It is revealed that the maximum frequencies dependent to depth attenuation correction were greater than theoretical values. In the accomplished laboratory data acquisition, the resulted relative error was diminished from approximately from 20% to about 1.5% by using the proposed method.