Simulations are used to examine the response of a shallow closed basin to a wind pulse. Features and differences of inertial oscillations and near-inertial internal waves are explored. The horizontal distribution of near-inertial energy is primarily controlled by the boundary effect on inertial oscillations, and the near-inertial internal wave makes a secondary effect. Near-inertial energy is reduced for cases with smaller water depths, due to energy transferred to seiches by barotropic waves.