Vertical structure of tidal currents in the Xuliujing Section of Changjiang River Estuary
Vertical structure of tidal currents in the Xuliujing Section of Changjiang River Estuary
复制标题
长江口徐六泾段潮流垂直结构
DOI：
10.1007/s13131-021-1976-y
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发表时间：
2023-02
影响因子：
1.4
通讯作者：
Shengping Wang
中科院分区：
文献类型：
--
作者：
Zhigao Chen;Ya Ban;Xiaoye Chen;Dajun Li;Shengping Wang
首次利用三台长期固定的声学多普勒流速剖面仪对长江口徐六泾断面的潮流垂向结构进行了观测。此外，三个不同的时期（春季，夏季和秋季）也被认为是调查的季节变化。半日潮的能量最大，M2分潮的沿槽流速可达80 cm/s，占各站的优势，其能量占各站的65%~ 75%。能量最大的半日分潮M2的潮汐椭圆形状表现出明显的平行于河岸的水流极化，其短半轴一般小于长半轴的20%。平均流速最大值均出现在表层，且随深度增加流速减小。河床冲淤后，局部地形复杂，可能是造成流向季节性变化的主要原因。观测到M2椭圆四个参数的垂向变化，与最优拟合的顶、中层摩擦解吻合较好。而在低水位区，摩擦力模型与实测资料有明显差异。这种差异可能是由于层结作用的影响，在夏季和秋季，由于长江口出流的淡化作用，层结作用增强。
Three long-term fixed acoustic Doppler current profilers were first used for investigating the vertical structure of tidal currents in Xuliujing Section of Changjiang River Estuary. Moreover, three different periods (spring, summer and fall) were also considered for investigating seasonal variations. The semi-diurnal tides were the most energetic, with along-channel speed of up to 80 cm/s for M2constituent, which dominates at all stations with percent energy up to 65%–75% during seasons. The shape of tidal ellipses of the most energetic semi-diurnal constituent M2showed obvious polarization of the flow paralleling to the riverbank, with the minor semi-axis being generally less than 20% of the major one. The maximum velocity of mean current is appeared in top layers at all the three stations, and the velocity decreased with the depth. The seasonal variations of direction are also observed, which is probably caused by complex local topography since the erosion and deposition in riverbed. Observed vertical variation of four parameters of M2ellipses, agreed well with the optimally fit frictional solutions in top and middle layers. However, there was an obvious difference between frictional model and observed data in the lower water column. Discrepancies are probably on account of stratification, which strengthens in summer and fall due to the freshening influence of the Changjiang River Estuary outflow.
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DOI：
10.1016/0278-4343(82)90004-8
发表时间：
1982-11
期刊：
--
影响因子：
--
作者：
D. Prandle
通讯作者：
D. Prandle
DOI：
10.1088/1755-1315/750/1/012023
发表时间：
2021
期刊：
IOP Conference Series: Earth and Environmental Science
影响因子：
--
作者：
H. Siagian;A. Ismanto;T. W. Putra;Pranata
通讯作者：
H. Siagian;A. Ismanto;T. W. Putra;Pranata
影响因子：
--
作者：
D. Ullman;D. Codiga
通讯作者：
D. Ullman;D. Codiga
影响因子：
2.3
作者：
BEARDSLEY, RC;LIMEBURNER, R;CANNON, GA
通讯作者：
CANNON, GA
影响因子：
4.4
作者：
Pawlowicz, R;Beardsley, B;Lentz, S
通讯作者：
Lentz, S