LONG-TERM TOPOGRAPHIC CHANGES AROUND SAND SPIT AND IMPACT OF EXTRAORDINARY HIGH WAVES DURING TYPHOONS

Toshiro San-nami; Takaaki Uda; Masashi Yamada; Toshinori Ishikawa

doi:10.9753/icce.v35.sediment.8

No. 35 (2016), Sediment Transport and Morphology

No. 35 (2016)

LONG-TERM TOPOGRAPHIC CHANGES AROUND SAND SPIT AND IMPACT OF EXTRAORDINARY HIGH WAVES DURING TYPHOONS

Sediment Transport and Morphology

https://doi.org/10.9753/icce.v35.sediment.8

Published 2017-06-23

Toshiro San-nami⁺⁻
Takaaki Uda⁺⁻
Masashi Yamada⁺⁻
Toshinori Ishikawa⁺⁻

Toshiro San-nami

Coastal Engineering Laboratory, Co., Ltd.

Takaaki Uda

Public Works Research Center

Masashi Yamada

Shizuoka Prefectural Government

Toshinori Ishikawa

Public Works Research Center

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Keywords

sand spit
Mihono-matsubara
typhoon waves
artificial headland
detached breakwater
beach changes
longshore sand transport

How to Cite

San-nami, T., Uda, T., Yamada, M., & Ishikawa, T. (2017). LONG-TERM TOPOGRAPHIC CHANGES AROUND SAND SPIT AND IMPACT OF EXTRAORDINARY HIGH WAVES DURING TYPHOONS. Coastal Engineering Proceedings, 1(35), sediment.8. https://doi.org/10.9753/icce.v35.sediment.8

Abstract

Around the Mihono-matsubara sand spit in Suruga Bay in Japan, the beach was eroded owing to the decrease in the fluvial sand supply from the Abe River triggered by excess riverbed mining before 1967, together with the discharge of sand into the deep sea via a steep slope near the tip of the sand spit. As a measure against beach erosion, an artificial headland (HL) composed of two detached breakwaters and the breakwaters (BWs) placed along the shoreline have been constructed along with beach nourishment, but the beach is barely maintained by these measures. In 2013, two large typhoons hit the coast, causing rapid beach changes around the structures, and these beach changes were superimposed on the long-term topographic changes that have occurred over a long time as a geomorphological process. In this study, their impact to the beaches was investigated on the basis of the field data.

https://doi.org/10.9753/icce.v35.sediment.8

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References

Itabashi, N., and T. Uda. 1998. Field observation of erosion and accretion waves on Shizuoka and Shimizu coasts in Suruga Bay in Japan, Proceedings of 26th International Conference on Coastal Engineering, 3178-3191.

Miyahara, S., T. Uda, M. Serizawa, and T. San-nami. 2015. Elongation of sand spit and profile changes on sloping shallow seabed, 8th International Conference on Asian and Pacific Coasts (APAC 2015), Procedia Engineering, 116, 245-253.

Silvester, R., and J.R.C. Hsu. 1993. Coastal Stabilization, Prentice Hall, Inc., Englewood Cliffs, New Jersey, p. 578.

Uda, T., and K. Yamamoto. 1994. Beach erosion around a sand spit - an example of Mihono-Matsubara Sand Spit-, Proceedings of 24th International Conference on Coastal Engineering, ASCE, 2726-2740.

Uda, T. 2010. Japan's Beach Erosion - Reality and Future Measures, World Scientific, Singapore, p. 418.

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LONG-TERM TOPOGRAPHIC CHANGES AROUND SAND SPIT AND IMPACT OF EXTRAORDINARY HIGH WAVES DURING TYPHOONS

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