Tidal energy budget in the Zhujiang (Pearl River) Estuary

BAI Peng; GU Yanzhen; LI Peiliang; WU Kejian

doi:10.1007/s13131-016-0850-9

珠江河口潮能收支研究

doi: 10.1007/s13131-016-0850-9

1.
物理海洋教育部重点实验室, 中国海洋大学, 青岛, 266100
2.
信息科学与工程学院, 中国海洋大学, 青岛, 266100

基金项目: The National Natural Science Foundation of China under contract No. 41476002; the Shandong Province Natural Science Foundation under contract No. ZR2014DQ013; the Shandong Scientific and Technological Development Program under contract No. 2013GHY11502.

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- 收稿日期: 2015-06-22
- 修回日期: 2015-10-21

Tidal energy budget in the Zhujiang (Pearl River) Estuary

1.
Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China
2.
College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China

摘要

摘要: 本文基于高分辨率斜压ROMS海洋模型对珠江河口内潮能收支进行研究。利用最小二乘法对模型输出水位进行调和分析并将结果与珠江河口及其临近沿岸18个验潮站潮汐调和常数做对比,所得M₂,S₂,K₁和O₁分潮的振幅平均绝对误差依次为4.6,2.8,3.2和2.8 cm,迟角平均绝对误差依次为9.8°,15.0°,4.6°和4.6°。同时,还利用11个验潮站观测所得水位时间序列对模型进行了评估,结果良好。依模拟结果,旱季进入珠江河口的总潮能通量为343.49 MW多于雨季336.18 MW,这种现象由旱季较雨季河口处海水密度更大且平均海表面高度更高引起。M₂,K₁,S₂,O₁和N₂分潮是珠江河口潮能贡献比重前五的分潮,可依次在旱季(雨季)向河口内输入242.23 (236.79), 52.97 (52.08), 24.49 (23.96), 16.22 (15.91) 和7.10 (6.97) MW的能量。孤立海岛和尖锐海岬处由底摩擦调控的涡旋所增强的湍动混合,潮流与海脊地形或与狭窄收缩水道间的相互作用等因素在河口内形成五个高潮能耗散区,约38%的总潮能于该五处区域耗散。
- 潮能通量 /
- 能量耗散 /
- 珠江河口 /
- ROMS模型
Abstract: Tidal energy budget in the Zhujiang (Pearl River) Estuary (ZE) is evaluated by employing high-resolution baroclinic regional ocean modeling system (ROMS). The results obtained via applying the least square method on the model elevations are compared against the tidal harmonic constants at 18 tide stations along the ZE and its adjacent coast. The mean absolute errors between the simulation and the observation of M₂, S₂, K₁ and O₁ are 4.6, 2.8, 3.2 and 2.8 cm in amplitudes and 9.8°, 15.0°, 4.6° and 4.6° in phase-lags, respectively. The comparisons between the simulated and observed sea level heights at 11 tide gauge stations also suggest good model performance. The total tidal energy flux incoming the ZE is estimated to be 343.49 MW in the dry season and larger than 336.18 MW in the wet season, which should due to higher mean sea level height and heavier density in the dry season. M₂, K₁, S₂, O₁ and N₂, the top five barotropic tidal energy flux contributors for the ZE, import 242.23 (236.79), 52.97 (52.08), 24.49 (23.96), 16.22 (15.91) and 7.10 (6.97) MW energy flux into the ZE in dry (wet) season, successively and respectively. The enhanced turbulent mixing induced by eddies around isolated islands and sharp headlands dominated by bottom friction, interaction between tidal currents and sill topography or constricted narrow waterways together account for the five energy dissipation hotspots, which add up to about 38% of the total energy dissipation inside the ZE.
- tidal energy flux /
- energy dissipation /
- Zhujiang Estuary /
- regional ocean modeling system

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珠江河口潮能收支研究

doi: 10.1007/s13131-016-0850-9

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Tidal energy budget in the Zhujiang (Pearl River) Estuary

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