Integrating with the national project of irrigation canal lining in the Egyptian countryside, the present
study is introduced. The study presents a technical comparison of differential equations that are usually
used for estimating the seeped water from the earthen irrigation canals. The quantities of irrigation water
that are lost due to seepage are great enough to decrease the wide gap between the needed and available
water quantities that Egypt seriously suffers from. So, the accurate estimation of the seeped water quantities
is very important. The study aims to select the suitable seepage equations for the Egyptian soil, climate,
and the currently used distributed irrigation system. It is also to assess the understudy network by
estimating the lost water quantities due to seepage by using the designed water sections’ dimensions and
comparing the results with those obtained using the existing field dimensions. In addition, to determining
the agricultural area that can be added to the current served area after preserving such great quantities.
From the Assiut countryside, the El-Sont canal and its network were chosen to be a case study. After
a careful technical reading of the seepage equations that researchers introduced previously, the closest
relationships to the case study were used. Results indicated that using the suggested relationship by
Nazir Ahmed and the Indian equation, gave the maximum seepage quantities for the entire El-Sont canal
network with about 21.5% of the total canal head discharge. Most of this lost water can be saved due to
the implementation of the national project for irrigation canal lining. This large amount of preserved
water can be used to irrigate 15% of the currently served area.