Fig. 18From: Effects of surface topography and subsurface structural irregularities of river embankments on Rayleigh wave propagationComparison of surface velocity amplitude ratios normalized by the synthetic waves calculated with the 16-order FD scheme and N = 30. a Model AP1 and (b) model AP2. Plotted points represent FD approximations of the spatial differences and grid spacings. N is the number of grid points per shortest wavelengthBack to article page