Shoreline Change Modeling on Emergency Beach Nourishment Project on West Beach of Beidaihe,China

摘要

By use of a shoreline-change numerical model(GENESIS)based on one-line theory,a preliminary modeling study on shoreline changes caused by a beach nourishment project in Beidaihe,China,is presented in this paper.Firstly,the GENESIS model is verified and model sensitivity to the major parameter changes is discussed by simulating a hydraulic model test.The beach nourishment project,after that the shoreline change is kept being monitored,is a small-scale emergency one carried out to use two bathing places on the west beach in the summer,2008.In this paper the shoreline changes caused by the beach nourishment project are modeled by the GENESIS model,and the computed results fit well with the measured shorelines.With the same model and parameters,a long-term performance of the project is predicted,and the result shows that the bathing places only can be suitable for bathing in 2 to 3 years without subsequence nourishment project.Therefore,it is proposed to nourish the beaches in time to keep the service life of the beach in recent years and carry out the beach nourishment project for the whole west beach as soon as possible.