Methods for Extracting Dispersion Curve of Scholte Wave in the Bottom of Shallow Water

In order to evaluate the performances of different methods for extracting dispersion curves of Scholte waves in the bottom of shallow water, the dispersion curves of phase velocity and group velocity of Scholte wave are extracted by F-K transformation, t-p transformation and moving window analysis method respectively, in which the seismic wave data in the shallow water simulated by high-order staggered grid finite difference method, then results are compared with the theoretical values. Performances of three methods are evaluated by parameters of relative error, mean square error and correlation coefficient. The results show that among the above three methods, the phase velocity and group velocity dispersion curves given by F-K transformation have the best correlation with the theoretical values, and those given by t-p transformation with the highest accuracy. Moving window analysis can only extract the group velocity dispersion curve, and its computational accuracy is between that of others.