Abstract
Strong low-pressure systems traveled along Japanese Main Island in October 2006. High waves and storm surge attacked Kashima Coast resulting huge and historical erosion. This study analyzes sand loss and gain in sub-aerial zone of northern part, a stretch of approximately 38 km from Ooarai Port to Kashima Port, and of southern part, a stretch of approximately 15 km from Kashima Port to Tone River, using airborne laser data measured in October 2005, November 2006 and May 2011. Eroded volumes of sub-aerial zone from year 2005 to 2006 were estimated 620,000 m3 for the northern part, and 600,000 m3 for the southern part. Recovery from year 2006 to 2011 was prominent for the southern part which was 1,000,000 m3, whereas it was small for the northern part.
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