MODEL FOR PREDICTING FORMATION OF BLOWOUT ON COASTAL SAND DUNE USING CELLULAR AUTOMATON METHOD

  • Takuya Yokota
  • Akio Kobayashi
  • Takaaki Uda
  • Masumi Serizawa
  • Atsunari Katsuki
  • Yasuhito Noshi

Abstract

On a sand dune, a blowout is often formed owing to wind effect. The formation of a blowout was observed on November 25, 2016 at the Node coast facing the Pacific Ocean, where a blowout has been formed to leave a concave topography. Then, a model for predicting the formation of a blowout was developed using a cellular automaton method, in which two important factors of saltation and avalanche were taken into account. The results of the numerical simulation were compared with the measured results on the Node coast, and the predicted and measured shapes of the blowout were in good agreement. Also, it was found that the direction of the beach access must be extended in the direction normal to the direction of prevailing wind to prevent blowout formation.

References

Andreotti, B., P. Claudin, and S. Douady. 2002. Selection of dune shapes and velocities Part 1: Dynamics of sand, wind and barchans, Eur. Phys. J., B28,321-339.

Katsuki, A., and M. Kikuchi. 2006. Simulation of barchan dynamics with interdune sand stream, RIMS Kokyuroku, 1472, 67-70. (in Japanese)

Katsuki, A., H. Nishimori, M. Kikuchi, N. Endo, and K. Taniguchi. 2011. Cellular model for sand dunes with saltation, avalanche and strong erosion: collisional simulation of barchans, Earth Surface Processes and Landforms, 36, 372-382.

NEDO: http://app8.infoc.nedo.go.jp/nedo/

Pye, K., and H. Tsoar. 1990. Aeolian Sand and Sand Dunes, Unwin Hyman, London, 42-43.

Yokota, T., A. Kobayashi, T. Uda, M. Serizawa, A. Katsuki, and Y. Noshi. 2017. Model for predicting formation of blowout on coastal sand dune using cellular automaton method, Proceedings of 9th International Conference on Asian and Pacific Coasts (APAC2017), 572-583.

Published
2018-12-30
How to Cite
Yokota, T., Kobayashi, A., Uda, T., Serizawa, M., Katsuki, A., & Noshi, Y. (2018). MODEL FOR PREDICTING FORMATION OF BLOWOUT ON COASTAL SAND DUNE USING CELLULAR AUTOMATON METHOD. Coastal Engineering Proceedings, 1(36), papers.40. https://doi.org/10.9753/icce.v36.papers.40

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