Abstract
My Khe Beach is located in Da Nang, the biggest city in Central Vietnam. Coastal erosion occurred in December 2017 has damaged many infrastructures located along this beach. Since there is no well-documented case study about coastal erosion in this area, Google earth images since 2002 were utilized to investigate the deformation of the My Khe Beach. The analysis results indicate that formations of megacusps in this beach were noticeable in the northeast monsoon season and it is clear that beach erosions occurred at the embayments of the megacusps. In addition, these megacusps were smoothed by the calm waves in the southwest monsoon season a few months later. The megacusps observed along the My Khe Beach have the alongshore spacing from 100 m to 300 m and the maximum cross-shore amplitude of 45 m. The local beach resorts have been developed without paying attention to this seasonal fluctuation of the beach. It is necessary to consider the characteristics of shoreline fluctuation clarified in this study for coastal planning and management.
