Preprints
https://doi.org/10.5194/os-2021-98
https://doi.org/10.5194/os-2021-98

  16 Nov 2021

16 Nov 2021

Review status: this preprint is currently under review for the journal OS.

Tide characteristics and tidal wave propagation in the Persian Gulf

S. Mahya Hoseini and Mohsen Soltanpour S. Mahya Hoseini and Mohsen Soltanpour
  • Civil Engineering Department, K. N. Toosi University of Technology, Tehran, P.C. 19967-15433, Iran

Abstract. A 2D hydrodynamic model is employed to study the characteristics of tidal wave propagation in the Persian Gulf (PG). The study indicates that tidal waves propagate from the Arabian Sea and the Gulf of Oman into the PG through the Strait of Hormuz. The numerical model is first validated using the measured water levels and current speeds around the PG and the principal tidal constituents of Admiralty tide tables. Considering the intermediate width of the PG, in comparison to Rossby deformation radius, the tidal wave propagates like a Kelvin wave on the boundaries. Whereas the continental shelf oscillation resonance of the basin is close to the period of diurnal constituents, the results show that the tide is mixed mainly semidiurnal. A series of numerical tests is also developed to study the various effects of geometry and bathymetry of the PG, Coriolis force, and bed friction on tidal wave deformation. Numerical tests reveal that the Coriolis force, combined with the geometry of the gulf, results in generation of different amphidromic systems of diurnal and semidiurnal constituents. The configuration of the bathymetry of the PG, with a shallow zone at the closed end of the basin that extends along its longitudinal axis in the southern half (asymmetrical cross section), results in the deformations of incoming and returning tidal Kelvin waves and consequently the shifts of amphidromic points (APs). The bed friction also results in the movements of the APs from the centerline to the south border of the gulf.

S. Mahya Hoseini and Mohsen Soltanpour

Status: open (until 11 Jan 2022)

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S. Mahya Hoseini and Mohsen Soltanpour

S. Mahya Hoseini and Mohsen Soltanpour

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Short summary
A 2D hydrodynamic model was employed to investigate the dynamics of tidal wave propagation in the Persian Gulf, a water body that has not been comprehensively studied before. The numerical model was verified by extensive field measurements all around the Persian Gulf. Numerical tests revealed that the Coriolis force, combined with the geometry of the gulf, results in generation of different amphidromic systems of diurnal and semidiurnal constituents.