Storm sequencing and beach profile variability at Hasaki, Japan
File(s)
Published version
Author(s)
Eichentopf, Sonja
Alsina, Jose
Christou, Marios
Kuriyama, Yoshiaki
Karunarathna, Harshinie
Type
Journal Article
Abstract
Beach profile evolution under storm sequence forcing presents an emerging research topic that has only been investigated at a limited number of sites. The occurrence and effects of storm sequencing on beach profile evolution are studied at Hasaki Beach, Japan, using weekly beach profile and two-hourly offshore wave measurements. During the 25-year study period, the supratidal beach at Hasaki is subjected to long-term accretion and steepening while the shoreline shows a long-term oscillation. In addition, oscillations of the supratidal beach volume and the shoreline at semi-annual and annual intervals are identified, which are largely controlled by the variability of the wave height. Hasaki Beach is subjected to frequent storms that often cluster in sequences, especially during the extra-tropical cyclone season (January to March). The majority of storms and sequences generate erosion of the beach above the low water level but some also lead to recovery. Despite a tendency for storms and storm sequences with larger power to cause more erosion, the present data does not demonstrate increased beach erosion by storm sequences. Following these findings, the tendency of the beach to evolve towards equilibrium and the importance of the antecedent beach morphology are demonstrated.
Date Issued
2020-06-01
Date Acceptance
2020-02-12
Citation
Marine Geology, 2020, 424
ISSN
0025-3227
Publisher
Elsevier
Journal / Book Title
Marine Geology
Volume
424
Copyright Statement
© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
License URL
Subjects
04 Earth Sciences
Oceanography
Publication Status
Published
Article Number
106153
Date Publish Online
2020-02-19