The Research Of Design Method Of Artificial Headland Bay Beaches

Nowadays, coastal areas have become the most important areas of human activities and economic activities. Because of the sea level rise in the century, beach erosion is becoming more and more serious in the world during recent years. As a result, the width of the beach becomes narrow, the slope turns to be steep. An effective and economic engineering method is needed to deal with the increasing severe problem.It has been proved that beach nourishment and artificial beach can serve these problems at the present stage and it has been profitable in many countries in America and Europe. An artificial beach has been designed to meet with the requirement that there isn't any disturbance of local environment. Furthermore, the designed borrow sand and beach slope would lead to a stable artificial beach with relatively less quantity of sand loss every year.This paper commences with a general introduction on headland-bay beach, followed by a brief introduction of the two major empirical models for this specific coastal landform, as well as a review for the progress on headland-bay beach research by geographers and geologists. Then comes out with a neural network method, which is a more convenient way to solve the problems, including interchange of beach stability, mitigating beach retreat by headland control, as well as the plan design of recreational beaches. As to the profile design of the artificial beach, this paper introduces several criterions of evaluation, consists of the half-life period theory which decides the property of the project, as well as the remained width and erosion volume which help to decide the optimal design.Practical examples of engineering applications using the previous methods are demonstrated in the last chapter in Liaoning Bayuquan Moon Bay beach. A groin is designed to stabilize the beach, then the berm elevation, slope and grain size are determined.