ANALYSIS OF WAVE RUN UP DYNAMICS AT JOGEHAMA BEACH JAPAN
AbstractThe big wave suddenly arrived at the beach, Niigata prefecture Japan in May 2014. And three children were carried off to the sea by the wave, though they played on the beach. When the accident occurred, the significant wave heights was 1.2m, and the wave period was 7.9 seconds. The beach characteristic topography has the cusp topography and steep slope. We tried to understand the reason why this accident occurred. Firstly, we reproduced the wave condition when the accident occurred. Secondary, we made the survey to understand the geographic feature of the beach. After the survey, we obtained the geographic data for the numerical simulation from the aerial photograph which were taken by UAV (Unmanned aerial vehicle). Finally, we comprehended the wave dynamics on the beach by the numerical simulation. We simulated the wave dynamics by the horizontal two dimensional numerical model and the vertical two dimensional numerical model.
Battjes, J.A., and J.P.F.M. Janssen. 1978. Energy loss and set-up due to breaking of random waves, Proceedings of 14th International Conference on Coastal Engineering, ASCE, 466-480.
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.
Wiegel, R.L. 1965. Oceanographical Engineering, Prentice-Hall, Englewood Cliffs, New Jersey, 531 pp.
Asai, Y., Ishigaki, T., Baba, Y. and Toda, K. 2009. Safety Analysis of Evacuation Routes Considering Aged Persons during Underground Floodingâ€, Journal of Hydraulic Engineering, JSCE, 859-864.
Coastal Development Institute of Technology. 2001. CADMAS-SURF 2Dï¼ŒTaiko-sha.
Inukai, N., Shinohara, M., Yamamoto, H., Ejiri, Y. and Ootake, T. 2017. Study on Behavior Change of the Run-up Wave on the Sandy Beach by Change of Topography and Wave Condition , Journal of JSCE, Ser. B2 (Coastal Engineering), JSCE, 72, No.2, I_1651-I_1656.
Inukai, N, Ootake, T., Yamamoto, H. and Hosoyamada, T. 2015. A Study for the Generation Mechanism of the Rip Current at the Enclosed Beach by the Groin, Proceedings of the Annual International Offshore and Polar Engineering Conferenceï¼ŒThe International Society of Offshore and Polar Engineersï¼Œ25ï¼Œ1359-1364.
JAXA. 2016. ALOSWorld 3D -30m (AW3D30), ALOS Research and Application Project of EORC, JAXA, on-line, http://www.eorc.jaxa.jp/ALOS/aw3d30/index_j.htm. JSCE. 1985. Hydraulic Official Collection, 529-531.
Marin Information Group. 2012. NOWPHAS -The Nationwide Ocean Wave information network for Ports and HArbourS. Port and Airport Research Institute, online, http://www.mlit.go.jp/kowan/nowphas/.
Maze, H., Tokoro, Y., Memita, T., Sakurai, H. and Imabayashi. T. 2006. Estimation Formula For Random Wave Runup On Seawalls Near Shoreline, Journal of JSCE, Ser. B2 (Coastal Engineering), JSCE, 62, No.1, 163-168.
Takahashi, S., Endoh, K. and Muro, Z. 1992. Experimental Study on People's Sefety against Overtopping Waves on Breakwaters -A study on Amenity-oriented Port Structures (2nd Rept.)-, Report of P.H.R.I, 34, No.4, 3-31.