Verification of Correspondence of Long-term Trend of Shoreline Position and Wind Wave Height Changes on the Akita Southern Coast

Abstract

Correspondence of the long-term trend of shoreline position and wind wave height changes on the Akita southern coast is verified through analyzing the variance, standard deviation and variation coefficient of both the field survey data, collected for more than the last 22 years, of shoreline position and observation data of wind wave height at the Sakata port offing for the same period of more than 22 years, and then comparing these analyzed results. Through the verification, it is confirmed that the standard deviations of the shoreline position and wind wave height changes on the Akita southern coast are gradually increasing with the years, and the time-dependent change pattern of both standard deviations is substantially the same.