الفهرس 
INTRODUCTION
Calculation of seepage flow using flow netOnly 14 pages are availabe for public view
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Abstract
The study of the effect of the outflow seepage problem resulting from the
variation of water-level in open channels is of great importance. It may cause
slope erosion as well as catastrophic failure. This problem usually occurs in
irrigation channel or canal embankments. It occurs due to differences in
water-level through the embankment and the canal.
The main aim of this thesis is to detect the effect of the outflow seepage
on the stability of the embankment slopes, to find the position of phreatic
line and seepage face. It is also aims to find the emperical formulae that
predict the rate of drawdown in respect of the other variables, and to evaluate
the amount of eroded sand due to the outflow seepage.
To achieve the main aim of this thesis a comprehensive literature review
of the publications which contain the subject oftbe research has first been
done. Secondly a laboratory-testing programme has been established to study
the most important parameters that affect the slope stability subjected to
rapid drawd own, such as the height” of water through the embankment, the
slope angle, the discharge and the change in the phreatic surface with time.
Then an analytical study using the data obtained from laboratory results has
followed.