New nonlinear equation of KdV-type for a non-flat bottom
  In the paper a new nonlinear equation describing shallow water waves with the topography of the bottom directly taken into account is derived. This equation is valid in the weakly nonlinear, dispersive and long wavelength limit. Some examples of soliton motion for various bottom shapes obtained in numerical simulations according to the derived equation are presented. 
Anna Karczewska, Piotr Rozmej and {\L}ukasz Rutkowski
nlin.PS