  The aim of this work is to investigate gravity-capillary waves resonantly
excited by two topographic obstacles in a shallow water channel. By considering
the weakly nonlinear regime the forced fifth-order Korteweg-de Vries equation
arises as a model for the free surface displacement. The water surface is
initially taken at rest and the initial value problem for this equation is
computed numerically using a pseudospectral method. We study near-resonant
flows with intermediate capillary effects. Details of the wave interactions are
analysed for obstacles with different sizes. Our numerical results indicate
that the flow is not necessarily governed by the larger obstacle.
