الفهرس 
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Abstract
The present thesis entitled: the distribution of
some trace elements in the River Nile from Isna to Al-
Kanater, Egypt, along a distance of 805 km, comprises
three main chapters. The first one deals with the
importancy of the selected metals (iron, manganese, zinc
and copper) with respect to aquatic life such as
phytoplankton and zooplankton, with indication of sources
and the factors affecting their spatial and seasonal
distribution for these metals in the aquatic environment.
The effects of building Aswan High Dam on Nile water
quality and fertility of the sediments beside the
degradation of the two banks of the River Nile are
explained. Sources of pollution along the River Nile are
also given. The previous studies on the distribution of
trace metals in water, biota and sediments are also
outlined.