The Study Of Bay Beach Restoration And Nourishment

According to coast engineering theory, hydrodynamics and morphdynamics, we discuss the technology of artificial beach. Choose Xiangshan-Changweijiao beach restoration project as a case and Summarize Experience of beach restoration. The contents include location selection, beach design and beach monitoring.Through the location selection, establish a suitable sandy coast for beach restoration. In Xiangshan-Changweijiao beach restoration project adopting four factors: coastal planning, appropriate hydrodynamic conditions, history of beach evolution and water quality. The beach design should obey the dynamic equilibrium of the beach, including the slope of beach face, filled grain, the berm height and wave elements parameters. All parameters could be calculated, according to the beach formula, made the beach slope and filled grain fit littoral system environment, take into account the natural attributes and Investment, the sand placement adopt dry beach nourishmentThe stable planform of Cape-bay coast is usually a certain form of the arc, the arc in the actual project was considered closest to hyperbolical spiral. In view of the Xiangshan-Changweijiao beach restoration project is in a special environment, the planform design simulates the existing stable beach features; For long-straight beach, need adequate sand to complement the loss of sediment transport along the coast and keep stable. In addition, some of the necessary buildings, can play the role of supplementary of beach stable planform.The beach monitoring is the important work for the beach growth, and provide a reliable basis. I will try to divide beach growth into the initialize period, shaping period, maturity and decline four phases. And estimate the artificial beach in response to the two extreme conditions. Firstly, the weak hydrodynamic environment bay beach, cause beach foreshore "mud"; Second, the response to storm,before the maturity of artificial beach storm play an active role for beach growth, but damage is still the main effect.