Abstract
The Longfengtou Beach in the Haitan Bay, located in Fujian Province of China and facing the Haitan Strait, has been suffering severe erosion due to the construction of seawalls. A simple beach nourishment project implemented has not achieved the anticipated beach restoration. Thus a practical solution has to rely on a combination with near-shore marine structures. In this study, a 2-D calibrated flow model is set up to investigate the effects of three different layouts of near-shore marine structures on the tidal current. It is shown that the breakwaters situated in both the north and south ends play a vital part in the protection against erosion. The offshore breakwaters can serve as a barrier to obstruct the current circulation then reduce the current velocity. The groyne linking the Guimo islet and the coast significantly reduces the south-to-north water exchange through the channel and redirects the current direction nearly perpendicular to the north breakwater, which cuts off the longshore transport that may have a negative influence on the beach, especially, the northern part. It is also noted that the monsoon at the site with different directions increases the current velocity. In general, proper layouts of marine structures can reduce the current velocity thus lead to less intense sand transport near the beach.
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XIE Zai-tuan, LAN Dong-zhao and CHEN Cheng-hui et al. Coastal erosion and prevention in Xiamen Island[J]. Journal of Oceanography in Taiwan Strait, 1993, 12(3): 293–297(in Chinese).
WANG Lin, XU Han-qiu and LI Sheng. Dynamic monitoring of the coastline changes in Xiamen Island with its surrounding areas of SE China using remote sensing technology[J]. Remote Sensing Technology and Application, 2005, 20(4): 404–410(in Chinese).
CAI Feng, SU Xian-ze and LEI Gang et al. Issues and considerations on coastal erosion along Meizhou Bay in Fujian Provinces[J]. Ocean Development and Management, 2005, (4): 94–99(in Chinese).
LIN Xin-ren. Coastal erosion of northeast Pintan Island and its influence[J]. Geology of Fujian, 2006, 25(3): 154–158(in Chinese).
YANG R. Y., WU Y. C. and HWUNG H. H. et al. Current countermeasure of beach erosion control and its application in Taiwan[J]. Ocean and Coastal Management, 2010, 53(9): 552–561.
BIRIA A. H., NESHAEI M. A. L. and GHABRAEI A. et al. Investigation of sediment transport pattern and beach morphology in the vicinity of submerged groyne (Case study: Dahane sar sefidrood)[J]. Frontiers of Structural and Civil Engineering, 2015, 9(1): 82–90.
BIRBEN A. R., ÖZÖLÇER I. H. and KARASU S. et al. Investigation of the effects of offshore breakwater parameters on sediment accumulation[J]. Ocean Engineering, 2007, 34(2): 284–302.
KUANG C. P., PAN Y. and ZHANG Y. et al. Performance evaluation of a beach nourishment project at west beach in Beidaihe, China[J]. Journal of Coastal Research, 2011, 27(4): 769–783.
KUANG C. P., HE L. L. and GU J. et al. Effects of submerged breakwater on hydrodynamics and shoreline change of the east beach of Beidaihe, Bohai Bay, China[J]. Journal of Coastal Research, 2014, 295(3): 598–614.
ZHANG W. Z., SHI F. and HONG H. S. et al. Tide-surge Interaction Intensified by the Taiwan Strait[J]. Journal of Geophysical Research: Oceans (1978–2012), 2010, 115(6): 1–17.
HU J., KAWAMURA H. and LI C. et al. Review on current and seawater volume transport through the Taiwan Strait[J]. Journal of oceanography, 2010, 66(5): 591–610.
JAN S., CHERN C. S. and WANG J. A numerical study of currents in the Taiwan Strait during winter[J]. Terrestrial Atmospheric and Oceanic Sciences, 1998, 9(4): 615–632.
HU Jian-yu, LIU Min-shi. The current structure during summer in southern Taiwan Strait[J]. Tropic Oceanology, 1992, 11(4): 42–47(in Chinese).
GUAN B., FANG G. Winter counter-wind currents off the southeastern China coast: A review[J]. Journal of Oceanography, 2006, 62(1): 1–24.
QIU Y., LI L. and CHEN C. T. A. et al. Currents in the Taiwan Strait as observed by surface drifters[J]. Journal of Oceanography, 2011, 67(4): 395–404.
ZUO Shu-hua, LI Bei. Study on hydrodynamic and sedimentation problems in development of harbors located at offshore area with many islands and tidal channels[J]. Journal of Hydrodynamics, 2010, 22(Suppl.): 587–592.
CHENG Peng-da, ZHU Hong-wei and ZHONG Baochang et al. Sediment rarefaction resuspension and contaminant release under tidal currents[J]. Journal of Hydrodynamics, 2014, 26(5): 827–834.
FANG G., YANG J. and THAO Y. A two-dimensional numerical model for tidal motion in the Taiwan Strait[J]. Marine Geophysical Researches, 1984, 7(1–2): 267–276.
DHI Hydraulics. MIKE 21 and MIKE 3 flow model hydrodynamic and transport module science documentation[M]. Copenhagen, Denmark: DHI Water and Environment, 2009, 3–4.
WU J. Wind-stress coefficients over sea surface and near neutral conditions—A revisit[J]. Journal of Physical Oceanography, 1980, 10(5): 727–740.
WU J. The sea surface is aerodynamically rough even under light winds[J]. Boundary layer Meteorology, 1994, 69(1): 149–158.
ALLEN J. I., SOMERFIELD P. J. and GILBERT F. J. Quantifying uncertainty in high-resolution coupled hydrodynamic-ecosystem models[J]. Journal of Marine Systems, 2007, 64(1): 3–14.
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Project supported by the Marine Public Welfare Program of China (Grant No. 201305003).
Biography: Jie GU (1961-), Male, Ph. D., Professor
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Gu, J., Ma, Y., Wang, By. et al. Influence of near-shore marine structures in a beach nourishment project on tidal currents in Haitan Bay, facing the Taiwan Strait. J Hydrodyn 28, 690–701 (2016). https://doi.org/10.1016/S1001-6058(16)60672-8
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DOI: https://doi.org/10.1016/S1001-6058(16)60672-8