الفهرس 
acknowledgmentOnly 14 pages are availabe for public view
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Abstract
Lake (Mariut) Maryout is lying south of Alexandria City. It is the second
largest city in Egypt and it has about 40 % of the total Egyptian industrial
activities. This lake is of vital importance as it is the main source of the
common and favorite fish (Tilapia species) for most of Alexandrine people. It
is also a good nesting ground for many migrating birds and is a place for
creation, entertainment and different water sports such as line fishing.
Lake Maryout is one of four Delta shallow (brackish water) lakes or
lagoons (Fig.1), namely Manzalah. Burrulus, Edku and Maryout, adjoin the
Mediterranean coast of Egypt. This lake lies at latitudes between 31 ° 04’ and
31° 08’ Nand longitudes between 29° 49’ and 29° 56’ E, and dislikes the
other delta lakes by having no direct connection with the Mediterranean Sea
as there is a natural ridge or barrier separating the lake from the sea (more
detailed description for the historical development of the lake is present in
page 17).
Lake Maryout currently is composed of four basins (Fig. 2a); namely the
Main Basin (proper lake), Northwest Basin, Fisheries Farm Basin and
Southwest Basin, most of the fish catch comes from the Main Basin (Thomas
et ai, 1994). The average water depth of the lake is about 1 meter and the
water level is always kept at about 2.8 m below sea level. This makes the lake
to work as a sink to drain different kinds of drainage waters from neighboring
catchment areas of Alexandria and Bohaira Provinces. The surplus water
rom the lake flows first to a neighboring Omoum Drain before pumping to the
sea using several pumps at EI-Mex pumping station (Fig. 2a).