Tidal propagation in the Gulf of Khambhat, Bombay High, and surrounding areas

Unnikrishnan, A. S. ; Shetye, S. R. ; Michael, G. S. (1999) Tidal propagation in the Gulf of Khambhat, Bombay High, and surrounding areas Proceedings of the Indian Academy of Sciences - Earth and Planetary Sciences, 108 (3). pp. 155-177. ISSN 0253-4126

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Official URL: http://www.ias.ac.in/j_archive/epsci/108/3/155-177...

Related URL: http://dx.doi.org/10.1007/BF02842329


The continental shelf on the west coast of India is widest off Bombay and leads into a strongly converging channel, the Gulf of Khambhat. Tides in the Gulf are among the largest on the coast. We use data on amplitude and phase of major semi-diurnal and diurnal constituents at forty-two ports in the Gulf and surrounding areas to define characteristics of the tides. We then use a barotropic numerical model based on shallow water wave equations to simulate the sea level and circulation in the region. The model is forced by prescribing the tide along the open boundaries of the model domain. Observed sea level at Bombay and currents from the Bombay High region at the centre of the model domain and from a shallow station off the port of Dahanu compare favourably with the fields simulated by the model. The simulated amplitudes and phases of the four most prominent tidal constituents also compare favourably with those observed along the coast, except at a few locations where the model spatial resolution (6.37 km × 6.37 km) appears to be inadequate to resolve the local geometry. Though this encourages us to conclude that the circulation in the region is dominated by barotropic tides, a concern is that the observational database on hydrography and directly measured currents in the region is weak.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Tidal Constituents; Tidal Circulation; Bombay High; Gulf of Khambhat
ID Code:54076
Deposited On:11 Aug 2011 12:03
Last Modified:18 May 2016 06:56

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