It usually includes breakwater, quay, ship repair and shipbuilder construction. The navigation facilities (beacons, lighthouses, etc.) of the ships in and out of the port are also within the scope of the harbour water works. Port of hydraulic structure design, in addition to meet the general strength, stiffness and stability (including the stability of the earthquake resistance) and subsidence requirements outside, still should pay special attention to the waves, water, sediment, ice and other dynamic factors on the function of port hydraulic structures and environment water (mainly water) effect on the structure of the corrosion, and take the corresponding bumper, prevent sediment, seepage control, anti-wear and anti-corrosion measures.