Study On The Law Of Wave Propagation And Variation When Wave Pass Over The Sloped-type Submerged Breakwater

Protection embankment is a common facility in coastal engineering and sea-port engineering, it plays an important role in protecting coastline from the invasion of the wave and providing safety operation for harbor basin. For the purpose of preventing more sediment entering into channel and harbor basin, and for the purpose of economizing quantities and reducing cost, the submerged breakwater is more and more used in the practice.Recently, research studies are done up on submerged breakwater home and abroad, meanwhile many achievements are obtained. But flaws remain in these achievements, which need further studies. Many present researchs take the physical model test as the main research way, on the foundation of physical model test, empirical equations and charts were made. These research results lack of support and interrelationship between theoretical and practical. Therefore, the study on submerged breakwater should be more emphasis on combining theoretical analysis and model tests, for irregular waves, study of the various changes is need.In addition to the study on wave height variation, the paper gives analies on wave height distribution, wave spectral shape changes and wave spectral parameters changes, these changes and the different factors shows a certain regularity. Through analysis of these laws, the paper gets the laws of wave height distribution and wave spectral shape, and the empirical formula for wave spectral parameters. All these provide reference for further studies of submerged breakwater.