The physical model test on structure types of pontoon breakwater in shallow water was done in the laboratory.

The numerical simulation method and physical model test were used for study of the hydraulic performance of the low lift head pumping station.

Based on the riverbed evolution analyses of the downstream reach of Oujiang estuary and physical model test of eight types of regulation projects,an estimation method for nondeposit velocity satisfying channel depth is presented under fixed bed model test condition.

In the physical model experiment which studies the floating body in ocean engineering, two wind-filed simulation methods are discussed.

To set the model sands for marine mobile bed physical model experiment is the key in the experiment to simulate the sediment movement.

As to the optimization of breakwater layout on sandy coasts,we suggest that the extension of the dike shall have an angle of less than 90° with the reverse direction of dominant wave directions,normally 45°~60°,which has been proved with physical model experimental results on sedimentation at the wat.

To make the marine structures of the Qingdao Olympic Games sailing base reliable,the physical modeling of two kinds of breakwaters and the stability ofarmor blocks are perrowed Under the wave conditions of different water levels,directions and return periods,the wave pressures and stable weights of the armor blocks are investigated.