Time series surface-wave recovery from pressure gage

Measuring short‐period wind waves in a tidally forced environment with a subsurface pressure gauge

“…Investigators have also attempted to improve the conversion of subsurface pressure data by considering higher order non-linear terms in the transfer function (e.g., Lee and Wang 1984;Hashimoto et al 1997). Other investigators have created and tested alternative empirically based transfer functions to transform the pressure signal (Wang et al 1986;Kuo and Chiu 1994;Tsai et al 2001). These investigations have shown that linear wave theory adequately transforms the subsurface pressure, and wave heights can be predicted to within approximately 10%, for developed sea and swell conditions.…”

Preliminary results on suspended sediment transport by tidal currents in Gomso Bay, Korea

“…Differential subsidence of the TISDOS on the seabed occurring at the deployment sites resulted in variable measuring levels for currents and SSC. The changes in water surface elevation were measured with a pressure sensor (Digiquartz) at 4 Hz, and were used to evaluate water depth with corrections for depth attenuation effects (Wang et al 1986) and wave statistics such as the significant wave height (H s ) and peak wave period (T p ). Wave statistics were calculated by applying the zero-down crossing method to the oscillatory part of the demeaned water-surface elevation records.…”

On the recovery of surface wave by pressure transfer function

“…In order to convert the measured pressure data to the surface wave information, a simple pressure transfer function derived from the linear wave theory has long been widely used. However, numerous articles have also raised doubts on the accuracy of using the linear pressure transfer function for recovering surface waves from measurements using an underwater pressure transducer (Hom-ma et al, 1966;Cavaleri, 1980;Biesel, 1982;Wang et al, 1986). Along with these authors, Wang et al (1986) and Nielsen (1989) also proposed methods to improve the accuracy of the surface wave recovery.…”

“…However, numerous articles have also raised doubts on the accuracy of using the linear pressure transfer function for recovering surface waves from measurements using an underwater pressure transducer (Hom-ma et al, 1966;Cavaleri, 1980;Biesel, 1982;Wang et al, 1986). Along with these authors, Wang et al (1986) and Nielsen (1989) also proposed methods to improve the accuracy of the surface wave recovery. On the other hand, Bishop and Donelan (1987) did an extensive laboratory experiment and showed that the surface wave height can be satisfactorily obtained by using the linear wave transfer function.…”

“…First of all, wave gauges with pressure transducers are simple and less expensive to use in the field. Secondly, since, pressure gauges are deployed under water, they are less prone to be damaged by sea traffic, fishing activities (Wang et al, 1986) or deliberate vandalism. In order to convert the measured pressure data to the surface wave information, a simple pressure transfer function derived from the linear wave theory has long been widely used.…”