Laboratory modelling has been carried out for internal waves propagating along the shelf in a twolayer fluid. There were studied perturbations of a stratified fluid induced in the shelf zone versus the stratification parameters and amplitudes of passing internal waves. It has been revealed that propagation of internal waves along the shelf margin may induce a shear flow in the shallow part of the shelf or generate the 3D internal wave motion normal to the direction of propagation of the initial wave system.