SAND WAVE EVOLUTION MODEL FOR EFFICIENT CHANNEL DEPTH MANAGEMENT

  • Nobuyuki Ono
  • Satoshi Nakamura

Abstract

Sand wave is a consecutive wavy bedform on seabed with several meters in wave height and several tens-hundreds of meters in wave length. If the crests of sand waves rise above the required channel depth, they often prevent vessels from safe navigation. In this study, a prediction model of sand wave evolution is applied to predict depth change at the crest of sand waves in Kanmon route, Japan. Kanmon route is a long, narrow and winding channel where strong tidal currents take place due to large tidal difference between Japan sea and Seto-island sea. In these area, a lot of bathymetric survey data have been collected to monitor the water depth. Also, channel deepening project up to -14 m is underway, and therefore reliable prediction model of sand wave evolution is needed for channel depth management in the future.

References

Kennedy, J. F. (1963): The mechanics of dunes and antidunes in erodible-bed channels, J. Fluid Mech. Vol. 16, Part 4, pp.521-544.

Nakamura, S, K. Toyama, A. Hirata (2015): Development of numerical prediction model for sand wave evolution, Journal of JSCE, B3 (Civil Engineering in the Ocean), Vol. 71, No. 2, I_281-I_286, (in Japanese)

Published
2018-12-30
How to Cite
Ono, N., & Nakamura, S. (2018). SAND WAVE EVOLUTION MODEL FOR EFFICIENT CHANNEL DEPTH MANAGEMENT. Coastal Engineering Proceedings, 1(36), sediment.97. https://doi.org/10.9753/icce.v36.sediment.97