BEACH CHANGES OF SHICHIRI-GA-HAMA BEACH IN KANAGAWA PREFECTURE AND THEIR REPRODUCTION USING BG MODEL

Abstract

  Beach changes of Shichiri-ga-hama Beach facing Sagami Bay was investigated using past aerial photographs and bathymetric survey data. The shoreline next to Point Inamura-ga-saki was severely receded with a shoreline recession up to 35 m since 1963. The breakwater of Shonan Port was extended by 1963, resulting in formation of wave shelter zone in the lee of the breakwater, and westward longshore sand transport was induced by the formation of wave shelter zone. Measured beach changes were reproduced using BG model proposed by Serizawa et al.