Study on spatial-temporal distribution characteristics of tidal skewness in the Wenzhou Bay

Feng Xi; Zhou Yuchen; Sun Fengming; Xu Huan; Wen Shiwei; Sun Zhuang; Liu Shijing; Feng Weibing

doi:10.12284/hyxb2022096

Volume 44 Issue 7

Jul. 2022

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Article Navigation > Haiyang Xuebao > 2022 > 44(7): 25-36

Feng Xi，Zhou Yuchen，Sun Fengming, et al. Study on spatial-temporal distribution characteristics of tidal skewness in the Wenzhou Bay[J]. Haiyang Xuebao，2022, 44(7)：25–36 doi: 10.12284/hyxb2022096

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Study on spatial-temporal distribution characteristics of tidal skewness in the Wenzhou Bay

doi: 10.12284/hyxb2022096

1.
College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China
2.
China Harbour Engineering Company Ltd., Beijing 100027, China
3.
Jiangsu Province Water Engineering Sci-tech Consulting Company Ltd., Nanjing 210003, China

Received Date: 2021-08-12
Rev Recd Date: 2021-11-28

Available Online: 2022-07-01

Publish Date: 2022-07-01

Abstract

Abstract

The changes of shoreline caused by human activities affect the kinematic characteristics of tidal wave in the propagation process. Based on the hourly tidal level data from five tidal stations in the Wenzhou Bay from 1984 to 2019, the temporal and spatial variation of tidal wave patterns in this area and deconstructed the contribution of major tidal clusters to the tidal asymmetry is analyzed in this study . The results show that the tidal patterns in Oujiang Estuary and Yueqing Bay, two semi-enclosed embayments of the Wenzhou Bay, are obviously different. The tidal symmetry of Oujiang Estuary is flood-dominant tide and the tidal asymmetry increases continuously in the upstream direction, whilst tide is ebb-dominant in Yueqing Bay. Moreover, the tidal asymmetry shows distinct seasonal variation. The skewness ($ \gamma $) reaches maximum in June to July and December to January in the Wenzhou Bay. The tidal asymmetry in this area is mainly controlled by the component groups such as M₂/M₄, M₂/S₂/MS₄ and M₂/N₂/MN₄. The skewness caused by nonlinear interactions from M₂/S₂/MS₄, M₂/N₂/MN₄, O₁/K₁/M₂ shows obvious seasonal variation. Since 2000, the tidal asymmetry of Wenzhou Bay has been decreasing, which is related to the frequent reclamation surrounding the Oujiang Estuary.
- tidal skewness,
- Wenzhou Bay,
- tidal clusters,
- shoreline changes,
- seasonal variability,
- yearly variability,
- flood-dry seasons

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References(12)

References

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