A Study of the Growth of the Wave Spectrum with Fetch

摘要: Abstract The development of the wave spectrum with fetch in a steady wind has been studied line consecutive buoys Bothnian Sea 1976 and 1979. relationship that was found between dimensionless peak frequency ωm (=ωmU10/g) X (=gX/U102) close to previous observations. energy ¯σ2 (=g2ω2/U104) about twice observed JONSWAP experiment. In saturation range when ¯ω>4 have form S(ω) = αuU10gω−4 where αu=4.5 × 10−3, independent X. deviation from Phillips −5 power law could not be explained by influence currents or finite depth. Near peak, spectra were satisfactorily described spectrum; above frequencies difference becomes significant. A qualitative explanation is proposed for dependence on speed range. semi-theoretical method Longuet-Hi...