Transformation of long surface waves in the coastal zone with a variable bathymetry

he transformation of long linear waves in a coastal zone of an ocean with the variable bathymetry is considered. The coefficients of transmission and reflection are calculated as the functions of frequency and the total depth drop for three typical models: (i) piece-linear, (ii) piece-quadratic, and (iii) hyperbolic tangential depth profiles. Wave scattering on three models of underwater barrier/trench are also studied; the results obtained are compared with each other and with earlier obtained