AbstractIn August 2016, four swimmers were carried away by the waves and drowned at Ishikari-hama beach in Hokkaido. In recent years, several other similar accidents occurred around the Ishikari coast. Therefore, in this paper, we tried to comprehend the features of the current dynamics in Ishikari Bay and Ishikari-hama beach. As research contents, we grasped the accident that occurred in the past years around the Ishikari coast. In this case, we used the on-line database of the newspaper article. As the result, we comprehended the feature of the accident in Ishikari Bay. Secondary, we made a field survey at Ishikari-hama beach. Thirdly, we confirmed the fluctuation of the current in Ishikari Bay due to short time fluctuation of the wind direction. Finally, we simulated the rip current and the wind driven current in Ishikari Bay.
Horikawa, K (1991).“Coastal Engineering,” University of Tokyo Press, 40-42.
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 Conference, The International Society of Offshore and Polar Engineers，Vol. 25，pp.1359-1364.
Inukai, N, Sakurai, R, and Yamamoto, H (2017). “Rip Current Dynamics around Detached Breakwaters,”， Journal of JSCE, Ser. B2 (Coastal Engineering), JSCE, Vol. 72, No.2, I_186-I_191.
JMA: Japan Meteorological Agency, “AMeDAS: Automated Meteorological Data Acquisition System,” http://www.jma.go.jp/jp/amedas/.
Inukai, N, Hayakawa, N, Fukushima, Y, and Sheng, P (2001). “A Numerical Study on the Wind-Driven Current Affected by the Wind Blowing along the Straight Shore,” Proceedings of Coastal Engineering, JSCE, Vol. 48, No.1, 391-395.
JODC: Japan Oceanographic Data Center, “500m Gridded Bathymetry Data” http://jdoss1.jodc.go.jp/cgi-bin/1997/depth500_file.jp.
MIG: 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/.
Unoki, S (1995). “ Physical Oceanography of the coast,” The Association of Japanese University Press, .252-256.
Yamashita, T, Kinoshita, T, Hoshi, H, Narumi, H, Hashimoto, T, Fukumoto, T, and Tada, A (1998). “Characteristics of Three-Dimensional Currents around Ishikari New Port,” Proceedings of Coastal Engineering, JSCE, Vol. 45, No.1 391-395.
Yamashita, T, Hoshi, H, Niiyama, M, Hasebe, T, Fukumoto, T, and Tada, A (1999). “Characteristics of Three-Dimensional Currents along the Coast of Ishikari Bay in Winter,” Proceedings of Coastal Engineering, JSCE, Vol. 46, No.1 426-430.
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