On wave spectrum in the water in Changjiang estuary

Wave spectrum was carefully analyzed in the water at Changjiang estuary in order to achieve specific model of spectrum suitable for the water.The parameter of spectrum-model was reckoned by comparing the practical wave spectrum with PM-spectrum,J-spectrum and New criterion-spectrum.In addition,by comparing the parameter of spectrum-model with the key factors of the representative wave,the relationship between them was found out.Furthermore,the recommended spectrum-model was put forward in different ranges according to the research.When the parameter of spectrum-model p is between 1.27 and 6.77,the new criterion-spectrum is recommended,otherwise J-spectrum(JONSWAP spectrum) is recommended.