Abstract
Field observation was carried out on a land-tied island extending near Bip Island in Van Phong Bay in Vietnam. It was found that this land-tied island extended by the deposition of sand supplied by southward longshore sand transport along the west coast of Bip Island, and its amount was estimated to be 655 m3/yr on the basis of the investigation using satellite images as well as the field observation. A sequence of beach changes showed that sand supply from the north coast of the island is the major factor for the extension of the land-tied island.
