Yoon, H.S., Kang, T.S., Nam, S.Y., Kim, J.T., and Park, J.H., 2007. Measuring coastline morphodynamics using video-based techniques at Haeundae Beach, South Korea. Journal of Coastal Research, SI 50 (Proceedings of the 9th International Coastal Symposium), 1106 – 1111. Gold Coast, Australia, ISSN 0749.0208

In this study, video-based monitoring systems were installed at three locations on high-rise buildings in Haeundae, Busan, South Korea and beach image data were obtained from September, 2003 to December, 2005. Through quantitative analyses (statistical and time-series analyses) of the observed video image data, areal changes in Haeundae Beach and the shoreline were identified and summarised as follows. 1) Shoreline changes varied according to season and could be divided into four sections (east side section I: 250 m; II: 350 m; III: 300 m; west side section IV: 250 m). The biggest change in beach width occurred in section III; the change pattern at section IV differed from that at the other sections. The shoreline usually regressed (eroded) during the typhoon period (summer) but progressed (by sedimentation) during other seasons. 2) The overall change in beach width was correlated with the frequency of typhoons during the same period with abrupt beach erosion occurring between July and September, when typhoons struck. However, beach erosion and sedimentation at both ends of the beach during winter and summer were opposite of that at the centre of the beach. 3) During the video-monitoring period the maximum beach area was approximately 42,689 m² and the minimum area was approximately 36,100 m². The beach area was reduced due to typhoons and high waves by about 15.4%. 4) The beach area decreased by 6,400 m² in summer during the typhoon period but rose by 5,300 m² through winter resulting in an 82.8% recovery. As a result, the total beach area declined by approximately 17.2% during the observation period.