Abstract:At present,artificial beach nourishment is considered an ideal way to protect sandy beaches,which has little impact on the ecological environment.However,it faces problems such as a high nourishment loss rate and a short replenishment cycle.This paper studies the design of sandy beach protection in the western section of Yalong Bay.In view of the characteristics of significant wave-current action,high beach erosion intensity,high landscape requirements,and strict ecological and environmental protection requirements in the project area,this paper analyzes the causes of beach erosion,summarizes key indicators such as the loss amount,loss rate,and replenishment cycle of different methods,explores the suitability of different methods for different scenarios,and combines model test research to creatively propose an “integrated four-in-one” beach ecological protection design model,which integrates ecological revetments,dry beach nourishment,nearshore nourishment,and underwater sand retaining dams.It is expected that the loss rate will be reduced by more than 20% within 5 years,and the replenishment cycle will be nearly doubled.
