大鹏湾海域海漂垃圾迁移路径研究

doi:10.11978/2025065

Abstract

Abstract:

As a key tourist area in Shenzhen, Dapeng Bay faces an annual accumulation of hundreds of tons of beach and marine debris. This study focuses on the Dapeng Bay region, establishing a marine numerical model based on the finite volume community ocean model (FVCOM). Simulated flow and wind field data were integrated into the Lagrangian particle-tracking model OpenDrift to investigate the migration patterns of marine debris in Dapeng Bay, combined with observational data from drift buoys. The results indicate that the prevailing winds in Dapeng Bay are easterly, northeasterly, and southeasterly. Under these wind conditions, more than 70% of the nearshore floating debris in the northern and eastern parts of Dapeng Bay accumulates in Yantian Port and the four Hong Kong islands (Crooked Island, Wong Nai Chau, Ngo Mei Chau and Double Island). Therefore, daily marine debris cleanup efforts in Dapeng Bay should prioritize the above areas. Through comparative experiments across different months and tidal conditions, this study reveals that wind direction primarily governs the overall movement trajectories of marine debris, wind speed influences drift duration and distance, and tidal variations affect stranding zones and the quantity of debris reaching different regions. The movement and distribution patterns of marine debris in Dapeng Bay uncovered in this study can provide valuable references for debris cleanup operations.

Key words: Dapeng Bay, floating debris, migration paths, numerical simulation

CLC Number:

P762.8

QIU Jiafu, LIU Jiaxin, DUAN Xiaowei, CHEN Shengli. A study on the migration paths of floating debris in the sea area of Dapeng Bay[J].Journal of Tropical Oceanography, 2026, 45(2): 160-172.

Figures/Tables 14

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模型相关参数	具体配置及参数选择
开边界驱动	潮汐(OTIS)、温盐(HYCOM)
海表强迫	风(ECMWF) 气温、气压、长短波辐射和蒸发降水(NCEP/NCAR)
计算时段	202301010000—202302010000 (UTC) 202304010000—202305010000 (UTC) 202307010000—202308010000 (UTC) 202310010000—202311010000 (UTC)
计算时间步长	外模1s、内模10s
水平扩散	Smagorinsky湍流闭合方案
垂向扩散	MY-2.5阶垂向混合参数化方案
结果输出频率	5min·次^-1

时间	主要风向(占比)	最频风速/(m·s^-1)区间	当月平均风速/(m·s^-1)
2023年1月	东北风(>70%)	4~5	4.47
2023年4月	东风(38%)、东北风(36%)	3~4	4.49
2023年7月	西南风(40%)、东南风(30%)	3~4	3.41
2023年10月	东南风(54%)、东风(20%)	3~4	4.49

时间	潮汐	主要风	粒子去向主要聚集区域
2023年1月	大潮	东北风	大鹏湾西侧海岸
2023年1月	小潮	东北风	大鹏湾西侧海岸、湾外(香港南部, 出湾口往西南方向运动至珠江口)
2023年4月	大潮	东风、东北风	盐田港、吉澳洲岛、黄泥洲岛、娥眉洲岛、往湾洲岛
2023年4月	小潮	东风、东北风	盐田港、吉澳洲岛、黄泥洲岛、娥眉洲岛、往湾洲岛
2023年7月	大潮	西南风	南澳湾及其周边区域
2023年7月	小潮	东南风	盐田港、吉澳洲岛、黄泥洲岛、娥眉洲岛、往湾洲岛
2023年10月	大潮	东风、东南风	大鹏湾西侧海岸及西北角
2023年10月	小潮	东风、东南风	大鹏湾西侧海岸、湾外(香港南部, 出湾口往西南方向运动至珠江口)

区域	潮汐	驱动因素	1月	4月	7月	10月
靠近湾顶	大潮	仅流场	0.4839	0.2968	0.5702	0.5421
	大潮	仅风场	0.2682	0.3213	0.2095	0.2394
	小潮	仅流场	0.3477	0.3684	0.3136	0.5676
	小潮	仅风场	0.1264	0.2084	0.1783	0.1343
靠近湾口	大潮	仅流场	0.3394	0.3431	0.5900	0.3158
	大潮	仅风场	0.3672	0.5772	0.1988	0.2335
	小潮	仅流场	0.3212	0.5227	0.2264	0.7430
	小潮	仅风场	0.2845	0.3615	0.5181	0.5317

A study on the migration paths of floating debris in the sea area of Dapeng Bay

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