Abstract
Nha Trang coast, which is located in the south central coast of Vietnam, is frequently affected by severe erosion in several months every year. Although the past studies have shown the shift of shoreline on this coast, detailed process of shoreline change is not clear. In this study, shoreline change in the north area, where the most serious erosion has been observed, is extracted from continuous images of coastal surveillance camera system. The seasonal shoreline variation on Nha Trang coast is one of distinct features and the change is characterized by seasonal variation of climate conditions. The retreat of shoreline in the north area and the advance of shoreline in the south area of Nha Trang coast occur during the northeast monsoon period with strong northeast winds and high waves. While in the remaining periods with the dominant of moderate winds and calm waves, shoreline advances in the north area and retreats in the south area.
