OBSERVATION OF A STORMY WAVE FIELD WITH X-BAND RADAR AND ITS LINEAR ASPECTS

概要

論文の詳細を見る
An X-band nautical radar system was employed to observe the wave field during a stormaround the research pier HORS in Hasaki, Japan. The radar system provides instantaneousdistributions of wave crests in the near-shore region, with image sequences comprising aclear spatial and temporal variation of the wave pattern. The spectra of radar echo signalsand water surface elevations from wave gauge records were compared, and a relatively highcoherence for a particular bandwidth was observed. A sequence of radar images was filteredat the dominant frequency, which was used to estimate the wavenumber distribution of therefraction field. The Fast Fourier Transform (FFT) andMaximum EntropyMethod (MEM)were used to estimate the wavenumbers. The estimated wave angles were then comparedwith linear refraction analyses. The water depths along the pier were also estimated usingthe linear dispersion relationship and compared with the surveyed depths. The linearestimates of hydrodynamic parameters during the passage of the storm are presentedin this paper to demonstrate the potential of radar measurements in capturing essentialcharacteristics of coastal dynamics.
World Scientificの論文
2007-06-01