Tidal wave and tidal current characteristics of the M<sub>2</sub> constituent in a semi-enclosed rectangular basin with a coastal barrier

Qian Xuesheng; Chen Yongping; Zhang Changkuan

doi:10.3969.issn.0253-4193.2014.09.005

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Qian Xuesheng, Chen Yongping, Zhang Changkuan. Tidal wave and tidal current characteristics of the M2 constituent in a semi-enclosed rectangular basin with a coastal barrier[J]. Haiyang Xuebao, 2014, 36(9): 37-44. doi: 10.3969.issn.0253-4193.2014.09.005

Citation:

Qian Xuesheng, Chen Yongping, Zhang Changkuan. Tidal wave and tidal current characteristics of the M₂ constituent in a semi-enclosed rectangular basin with a coastal barrier[J]. Haiyang Xuebao, 2014, 36(9): 37-44. doi: 10.3969.issn.0253-4193.2014.09.005

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Tidal wave and tidal current characteristics of the M₂ constituent in a semi-enclosed rectangular basin with a coastal barrier

doi: 10.3969.issn.0253-4193.2014.09.005

1.
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098,China
2.
College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098,China

Received Date: 2013-08-01
Rev Recd Date: 2013-11-25

Abstract

Abstract

A model of a semi-enclosed rectangular basin with a coastal barrier is schematized from the Bohai Sea, the Huanghai Sea and Shandong Peninsula. Using the DELFT3D-FLOW numerical model, we have conducted the analyses of the tidal characteristics of the M₂ constituent , the formation mechanism of the amphidromic points and the radial tidal current field in the basin. The results show that,due to the Coriolis force and the barrier reflection, there will always present an amphidromic point in front of the coastal barrier. However, the radial tidal field is absent in the case of uniform water depth with an exception of the existence of mild slope in the nearshore topography. It is found that the locations of the focal point of the radial tidal current field and the amphidromic point are affected by the mean water depth. With the increase of the mean water depth, the location of the amphidromic point will shift to the entrance and the central axis of the basin, while the focal point of the radial tidal current field will move towards the entrance of the basin. The findings in the paper will facilitate the understanding of the formation mechanism and dynamic characteristics of stationary tidal wave in this type of the basin.
- rectangular basin with a coastal barrier,
- M₂ tidal constituent,
- stationary tidal wave,
- amphidromic point,
- radial tidal current field

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