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vol-13VERTICAL DISTRIBUTION OF IRON, PHOSPHORUS AND
OTHER ELEMENTS IN TWO SEDIMENT CORES .
FROM LAKE EDKU.
RAMZY B. NESSJM
National Institute of Oceanography and Fisheries, Alexandria, Egypt.
ABSTRACT
Lake Edku is the smallest of the Nile Deltl
brackish water coastal lakes. It is connected ~ith
the Mediterranean Sea through a short and shall”w
channel. The lake receives at its eastern and
southern margins considerable amounts of agricultural
drainage water. Two short cores in the recent
sediments were collected on October 1983. one near
the vicinity of the lake – sea connection and the
other far east near the eastern agriCUltural drah.
The sediments were sectioned at 10 ClII intervals
and analyzed for total iron and phosphorus in
addition to calcium. magnesium. sulphate. organic
matter and water content. The results showed
remarkable differences between the surface and
deep sediments of the eastern plrt of the lake
when compared with those near the mixing area.
Average percentages for all samples were: iron
3.0. phosphorus 0.04. water content 55.5. organic
..tter 6.4, sulphate 2.0. calcium 1.8…gnesium
1.9 and calctum-magnesium carbonate 15.5. These
different constituents could be arranged in a certain
order according to their abundance. Different
degrees of correlations between the studied vartables
were also given.
