LONG-TERM BEACH CHANGES OF COASTS SURROUNDING OHARAI PORT INCLUDING IMPACT DUE TO THE 2011 GREAT TSUNAMI

Abstract

 In the previous studies on beach changes around Oharai Port in Ibaraki Prefecture, the beach changes in areas north and south of the port were separately investigated and the overall comprehensive studies were not carried out. This area was damaged by the 2011 Great Tsunami occurred on March 11, 2011. In this study, recent beach changes occurred in this area between Naka River mouth north of Oharai Port, and Narita and Kamigama coasts were investigated, including the effect of the great tsunami.