Oujiang Estuary is a complex tidal estuary with many channels and shoals in the East China Sea, which was affected by typhoon frequently. The navigation channel of Wenzhou Port is located in the north branch of Oujiang Estuary, which happened serious sediment siltation in many times due to typhoon impact. The regulation is considered to decrease siltaion of the channel and protect shoals as well. According to the site survey data, the mathematic model is established and validated, which simulates the hydrodynamic, sediment transport and channel siltation due to typhoon in Oujiang Estuary. The channel regulation scenario is studied by the model simulation after analysis of the silation character. It indicates that the high concentration sediment from shoals north of channel is main sediment source caused siltation in the channel, which can be prevented into the channel by the regulation scenario and decrease siltation efficiently.
1. Dou G. R., Dong F. W., Dou X. B., Sediment transport capacity of tidal currents and waves Chinese Bulletin of Science, Vol. 40, no.13, pp. 1096-1101, 1995.
2. Fujita T., Pressure distribution in typhoon. Geophy Mag, Vol. 23, pp. 437-452, 1952.
3. LI M. G., The effect of reclamation in areas between islands in a complex tidal estuary on the hydrodynamic sediment environment. Journal of Hydrodynamics, Vol. 22, no.3, pp. 338-350, 2010.
4. NOAA, Meteorological criteria for standard project hurricane and probable maximum hurricane wind fields, Gulf and East Coasts of the United States, National Oceanic and Atmospheric Administration, 1979.
5. Ueno T., Non-Linear numerical studies on tides and surges in the central part of Seto Inland Sea. Oceanographical Mag, Vol. 16, no.2, pp. 53-124, 1964.
6. ZHAO D. Z., LIU J, WU H. L., Preliminary analysis of typhoon-induced sudden sedimentation in navigation channel in Yangtze Estuary over last decade. Journal of Sediment Research, Vol. 4, no.2, pp. 54-60, 2012.
7. ZUO L. Q., Further study on back silting and regulation of mouth bar in Oujing esturary. Hydro-science and engineering, Vol. 3, pp. 6-13, 2012.