Causes of the different behaviour against erosion: Study case of the Benidorm Beaches (1956–2021)

Coastal erosion is a natural phenomenon that becoming growing problem along coastlines around the world. In this research, evolution of two beaches located in Benidorm (Spain) has been studied: Poniente Beach and Levante Beach. Both have similar characteristics, but present different morphological behaviour. An analysis shoreline carried out using aerial images. Then, waves incident storms were studied and, finally, sedimentological was performed. From results obtained, eastern zone presents higher rates than western zone. This trend disappeared last analysed period due to change incoming wave regime. A decrease frequency coming from east caused tilting suffered by beach. Beach, intensity reduced, making lower. Furthermore, important differences found study, such as lack homogeneity sediment grain sizes worse wear behaviour on compared which means these behave differently facing erosion. accurate knowledge factors mentioned will provide adequate tools for its future management.