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Articles

1968: Vol. XLV, No. 2

Variation of Sea Level at Alexandria

Soumise
août 11, 2015
Publié-e
2015-06-25

Résumé

The study of the variation of the mean sea level at Alexandria has not been carried out before, although the value of the mean sea level itself was determined by different authorities for other purposes. The value of the mean sea level at Alexandria was determined by the Survey Department of Egypt when it started its first order levelling in 1906. The observations available at that time covered the years 1898 to 1906. They were used to calculate the mean sea level as the mean between the daily readings of high and low levels. This value of the mean sea level is still used as the reference datum for the network of the precise levelling. Dr. Robert Von Sterneck calculated the harmonic constants for Alexandria from one year of observations (1-7-1916 to 1-7-1917). These values were published on sheet No. 2083 of the International Hydrographic Bureau’s Special Publication 26. The object of this paper is to give a general picture of the variation of the mean sea level at Alexandria in relation to the meteorological elements, namely wind speed and pressure.