Experimental Research on Reduction Measures of Sediment Deposition of the Power Plant Port under the Long Period Wave

The maintenance cost of port project after its completion is very important, especially for work at outlet of power plant. Maintain regular dredging for channel and water intake is necessary, but severe deposition caused a large cost increase in the annual maintenance costs are also not in economy. Therefore, it is necessary to improve the current project scheme to reduce the deposition rate, so that long-term port maintenance costs would be greatly reduced. Because this power plant is located in the sea area under the long period waves, sediment is completely active, and deposition continually appears in the excavation process of harbour basin and channel, and the channel can’t be formed. In this paper, a physical modeling experiment of sediment under long period wave is carried out. Firstly, the sediment movement of the tale quale is validated and the reasons causing the severe deposition in the harbour basin are analyzed. Then, the deposition status and the effective controlling soil erosion in the harbour basin and the channel by using measures of lengthening the breakwater and building spur dikes are researched and their deposition intensity are analyzed. From the results, basic data and some useful measures can be provided for project optimization.