A numerical model of coastline deformation for sandy beach at downstream of a jetty

A reformed numerical model based on the "one-line theory" for beach deformation is presented. In this model, the change of beach slope during coastline procession is eonsidered. A wave numerical model combined with wave refraction, diffraction and reflection is used to simulate wave climate to increase numerical accuracy. The results show that the numerical model has a good precision based on the adequate field data. The results can be applied to practical engineering.