Results of an experimental study of the formation of sand bedforms under the action of soliton and bound states of solitons in a wave flume are reported.  Solitons are generated in a resonator by harmonic force. 

Numerical simulations  of  Boussinesq  equations  show  a good agreement between calculated and measured  surface wave displacement. It is shown that bar with superimposed ripples appear, with bar crests beneath the nodes of surface wave, when bars are formed  with crests beneath  the antinodes of surface wave fore standing wave without solitons.