AN INVESTIGATION ON THE FORMATION OF SUBMERGED BAR S UNDER WAVES IN THE CASPIAN SEA COASTAL REGION

As a result of waves, cross-shore change, which will vary in stormy waves in compare to the sea normal waves. Profiles formed by stormy waves are called erosionprofiles, and profiles formed by normal waves are called cumulative profiles. Hashemi et al. (2010) conducted studies of forecasting seasonal changes in coastal profiles;They collected data on the coast of the Gulf of Tremodoc by artificial neural network. The results show that the ANN method is more accurate than other expensivenumerical models [1]. Demirci et al. (2011) studied the influence of parameters affecting sediment transport during 64 experiments in their studies. Regarding theproposed equation, the higher the wave steepness (H0/L0) increases, the amount of sediment transport increases, which will increase the size and volume of the bar. Inaddition, with increasing sediment transfer to the sea, the amount of erosion of sediments increases from the front of the beach (coastal forehead) and the distance between thecoastline to the beginning and the end of the bar increases. They also discovered that the movement of sedimentstoward the sea leads to the movement of the bars andhence the place of wave break is also displaced [2]. Chenget al. (2016) carried out studies on 165 beaches and usedtwo Unibest-TC and S beach coastal profile software toestimate storm coastal changes. They argued that theunibest-TC model could be used to determine the directionof the motion of the sandy bars and the S Beach model canbe efficient in determining the exact extent of coastal barserosion as well as shore line changes [3].