astronomical tide

astronomical tide

[‚as·trə′näm·ə·kəl ′tīd]
(oceanography)
An equilibrium tide due to attractions of the sun and moon.
References in periodicals archive ?
According to the BMD bulletin, the low-lying areas of some coastal districts are likely to be inundated by storm surge of 8- 10 feet height above normal astronomical tide.
5 metre high above astronomical tide would inundate low-lying areas of Guntur, Krishna, West and East Godavari districts at the time of landfall, it said.
The new channel, which required the dredging of 65 million cubic metres, has a minimum depth of nine metres at lowest astronomical tide and a minimum width of 200 metres.
The minimum depth is 9 metres at lowest astronomical tide, and the minimum width is 200 metres.
Mr Stutter left Holyhead beach in a boat which was "unsuitable for the sea" at around 7am on March 30 - a day when it was the biggest astronomical tide of the year.
2 m lower than the highest astronomical tide, only very large tides are able to cover the marshes with a significant depth of water.
These calculated values were then used in a separate equation to calculate the storm surge expected at both high and low astronomical tide for a specific location in Charleston, South Carolina based on the sites' elevation above mean sea level, for a variety of landfall possibilities.
5 metre over the astronomical tide is likely to inundate low lying areas of Chennai, Kancheepuram, Tiruvallur and Nellore districts, it said.
With its deep-water berth, maintained at over 8 metres Lowest Astronomical Tide (LAT) all year round, this also ensures the offshore base is open to larger vessels.
The wind-driven surge of height 5-7 feet above the normal astronomical tide is inundating the low-lying areas in Cox's Bazar, Chittagag, Noakhali, Feni, Laxmipur, Bhola, Barisal, Patuakhali, Barguna, Chandpur, Pirozpur, Jhalakathi, Bagerhat, Khulna, Satkhira and their off shore islands and chars," a met office spokesman told Gulf News.
When a storm tide coincides with an exceptionally high astronomical tide and shallow water depths, the results may be little short of catastrophic.

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