抄録
A field survey was conducted at Oiso Beach, Seisho Coast, Kanagawa Prefecture. Three geotextile sand packs were placed in order to examine the applicability of sand packs to beach erosion control. Nourishment was introduced together with the sand packs. Frequent high resolution monitoring of beach topography was conducted by using a 3D laser scanner. Development of beach cusps and entrapment of gravels by sand packs were described on the basis of thirteen measurements performed in the period from September 2010 to February 2011. The wavelength of the beach cusp was found to be dependent on characteristics of waves and tides, and shortened by the presence of sand packs. The applicability and limitations of stereo imagery on beach topography monitoring was discussed.
