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Abstract The development of imaging systems is nowadays established as one of the most powerful and reliable tools for monitoring shoreline changes. Video-based technology is now becoming an increasingly popular method for monitoring beach fundamentally because it can be used to build a database of frequent, long-term and spatially extensive observations of shoreline changes. It covers timescales from seconds to years and spatial scales from meters to kilometers and possible for monitoring beach morphology as well as dominant factors governing evolution in the nearshore area. In this study presents preliminary results on studying seasonal shoreline change in Gwangan beach, Busan, Korea using high resolution image analysis technique with tide correction, error analysis and mapping accuracy. It is necessary to know at least 6 controlled points in UTM system from GPS devices to calculate parameters for image analysis. For the scope of video monitoring, GCP (Ground Control Point) was measured. In this study we have developed a program from relationship between image coordinate and several real point with coordinate and image corresponding to the position of image point to analysis and interpret shoreline changes. After automatic detection the coastal line via the color spectrum, wave dynamics parameters are also determined. From shoreline change as above mentioned, it is easy to determine the daily sand volume changes. The results of research indicate that the monitoring technique on shoreline changes is very significant and it obviously illustrates a good and appropriate tendency and general picture on seasonal changes of shoreline. This study on shoreline change will be use an important role in calibration and verification for numerical model in order to forecast the long-term evolution of coastal changes.
Shin et al. (Thu,) studied this question.