Forecasting the development of the sea coastal area based on analysis of the clif-beach dynamic system

The paper is devoted to the study of the dynamics and stability of the coast. The seaside territories are an active geodynamic system, which,being at the junction of the land and sea systems, has a high rate of change(transformation) processes. Relevance of the topic due to the economic value of the shores and a huge in-crease in anthropogenic load on them. A dynamic simulation model is presented to calculate the optimal amount of beachforming material to be maintained on the beach. The studies carried out made it possible to significantly clarify the ideas about the hydro- and lithodynamic processes occurring in the coastal zone of the beach. The influence of the parameters of waves and sediments that make up the beaches on such morphometric characteristics of the surf zone, which are important for the practice of marine coastal protection, such as the length and height of the wave run-up, the depth at the point of their collapse, is shown