A COASTAL AREA MODEL CONSIDERING WAVE-CURRENT INTERACTION AND ITS APPLICATION TO WIDE-CRESTED SUBMERGED BREAKWATER

Masamitsu Kuroiwa, Ahmed Khaled Seif, Yuhei Matsubara, Yasushi Ichimura, Hajime Mase, Mazen Abualtayef

Abstract


This study is concerned with development of a 3D morphodynamic predictive model for considering wave-current interaction by using wave action balance equation. The developed model was applied to model tests associated with a detached breakwater and wide-crested submerged breakwaters, and the influences of strong currents around the structures into wave height distribution and bathymetry change were investigated. Furthermore, the morphodynamics around the artificial reefs in the Uradome Beach, Tottori, Japan, was computed. From the computed results, a large scour hole due to strong rip-currents in the opening of the reefs was reproduced. The applicability of the model was confirmed.

Keywords


morphodynamic; submerged breakwater; rip-current; numerical simulation

References


De Vriend, H.J., J. Zyserman, J. Nicholson, J.A. Roelvink, P. Pechon, and H.N. Southgate. 1993. Medium-term 2DH coastal area modeling, Coastal Engineering, 21, 193-224.http://dx.doi.org/10.1016/0378-3839(93)90050-I

Chawla, A., and Kirby, J.T. 2002. Monochromatic and random wave breaking at blocking points. Journal of Geophysical Research, 107, No. C7.http://dx.doi.org/10.1029/2001JC001042

Dally, W.R. and Brown, Ch.A. 1995. A modeling investigation of the breaking wave roller with application to cross-shore currents. Journal of Geophysical Research, 100, No. C12, pp.873-883.http://dx.doi.org/10.1029/95JC02868

Kuroiwa, M., Matsubara, Y., Kuchiishi, T., Kato, K., Noda, H. and Son, C.B. A 2002. Morphodynamic model based on Q-3D nearshore current model and application to barred beach. The Proceedings of the 28th International Conference on Coastal Engineering, pp.3409-3421.

Kuroiwa,M, J.W.Kamphuis, T. Kuchiishi and Y. Matsubara. 2004. A 3D morohodynamice model with shoreline change based on quasi-3D nearshore current model, Proceedings of 29 th International Conference on Coastal Engineering, ASCE, Kuroiwa, M., T. Kuchiishi and Y. Matsubara. 2006. Prediction System of 3D Beach Evolution with 2DH and Q3D Hydrodynamic Modes, Proceedings of 16th International Offshore and Polar Engineering Conference, 751-757.

Kuroiwa,M., T. Kuchiishi, K.Kato, S. Sunagawa and Y. Matsubara. 2008. Applicability of coastal area model to morphodynamic around river mouth, Proceedings of 31 st International Conference on Coastal Engineering, ASCE, 2218-2230.

Kuroiwa,M.,Y. Shibutani, Y. Matsubara,T.Kuchiishi and M. Abualtyef. 2010. Numerical model of 3D morphodynamic after offshore nourishment, Proceedings of The International Conference On Coastal Engineering, No. 32, Shanghai,China. Paper #:sediments.55. Retrieved from http://dx.doi.org/10.2208/proce1989.43.571

Zheng, J., Mase, H., Demirbilek, Z., and Lin, Li 2008. Implementation and evaluation of alternative wave breaking formula in a costal spectral wave model. Ocean Eng, 35, pp.1090-1101.


Full Text: PDF

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.