摘要
为揭示南黄海辐射沙洲海域夏季潮流特征和变化规律，于2011年7月12日～8月11日在南通岸9t,2个固定点利用ADCP潜标进行了分层海流和水位观测。结果表明：（1）海域为规则半日潮，潮差较强（A和B站最大潮差分别为8．07m和5．89m），属强潮海域；（2）剖面各层流速垂向差异明显，表层流速最大（A和B站月均流速分别为98．2cm／s和92．Ocm／s），向底层逐渐减小（A和B站月均流速分别为62．6cm／s和55．5cm／s）；表层流速受海况影响明显，两站各层最大流速均出现在涨潮时段涨急时刻（A和B站最大流速分别为234cm／s和229cm／s）；（3）A和B站潮流均属往复流，受地形限制涨落潮主流向和深槽的延伸方向基本一致；表层流流向受风况影响显著，甚至出现单一流向；（4）A和B站余流流速从底层至表层递增，表层流速最大，流向分别为西南或偏西北与西北向，方向均为向岸型，有利于滩涂淤涨和水产养殖山／发展。
The characteristics of currents operating in a vertical profile were investigated by measuring vertical current speed and direction in two fixed locations in the southern Yellow Sea, near Nantong, Jiangsu Province. Current flow was measured from July 12 to August 11, 2011 using an ADCP. The area is macrotidal, experiencing semi-diurnal tides with a tidal range of 8.07 m and 5.89 m at monitored stations A and B, respectively. There are significant differences in tidal current velocity throughout the vertical profile. Surface currents were inferred from sea conditions. The average velocity decreased from the surface （98.2 cm/s at station A and 92.0 cm/s at station B） to the bottom （62.6 cm/s at station A and 55.5 cm/s at station B）. Intertidal and spring-neap flows are highly variable, with peak velocities of 234 cm/s and 229 cm/ s recorded during flood tidal stages at stations A and B, respectively. In the study area, the current direction alternated, and was consistent with the orientation of deep channels. The surface current was inferred from sea conditions, and consistently flowed in the same direction. In the vertical profile, average residual flow velocity was highest at the surface and lowest at the seabed. The residual flow was directed southwest at station A, and west and northwest at station B. In both cases, residual flow was toward the coastline where wetlands are located. This is likely to benefit the wetland in terms of accretion and the development of aauatic habitats.
出处
《上海国土资源》
2012年第4期34-38,47,共6页
Shanghai Land & Resources
基金
国家海洋公益性行业科研专项(200905014)
关键词
南黄海
辐射沙洲
潮流
滩涂
south Yellow Sea
radial sandbank
tidal current
wetland
