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vol-18TIDAL LEVELS IN ALEXANDRIA EGYPT
ZEINAB A. MOURSY
National institute of Oceanography and Fisheries, Kayet-Bey, Alexandria, Egypt.
ABSTRACT
The precise behaviours of tidal levels at Alexandria were
Inveatlgated during one year period (1976). The mein
feature. of this semi-diurnal tide were defind by the tidal
phenomena (MHWS, HHWN,MLWS, MLWN, HHWL AND LLWL) which
determined from the major four harmonic constituents (“2′
S2′ K1 and 0,) and cOfl1)ared witg the one obutned from the
recorded tidal levels.
Theoretical and observed highest, lowest and mean
astronomical tide were determind.
Ttdal ranges were studied and showed largest value of 36
cm and smallest range of 4 cm.
Special attention has been paid to the theoretical
relation of tide level (T.L.) to sea level (S.L.) which
ahowed a lower of tide level by 0.02 cm, while the ratio of
T.L to S.L Is almost constant during a yeer.
j. Attention has been also paid to the frequency
distribution of both T.L and S.l where the deviation between
them ~ave been noted during winter months which attributed
to meteorological factora.
