الفهرس 
LITERATURE REVIEWOnly 14 pages are availabe for public view
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Abstract
Due to the continuous growth of population and the urgent need
for food security, expanding the reclamation of new lands within
the unlimited desert area of Egypt, has started with the desert
fringes of the Nile Valley and Delta. In West Tahta about 5000
fcddans (21 .3 krn’) of desert lands were reclaimed along the fringes
of the Nile Valley, adjacent to the traditionally cultivated area, in
1978. The topographic level of the reclaimed area of West Tahta is
10 to 25 meters above the level of the ground surface in the
adjacent traditionally cultivated lands, To supply the reclaimed
desert area with irrigation water, four surface water pumping
station and a system of irrigation canals were constructed. The
main and lateral irrigation canals are not lined and the soils are
sandy. So, the subsurface water losses due to leakage from the
irrigation canals and irrigated areas into subsoil are considerably
high. This leakage makes continuous recharge and seepage from
the high reclaimed areas to the low traditionally cultivated areas.
Consequently a strip of 600 meters (1000 fed dans) of traditionally
cultivated lands is severely affected by waterlogging and
salinization.
To study the problem of waterlogging and groundwater condition
in West Tahta area, a two dimensional finite element groundwater
tlow pakage were modified to take into consideration the
interaction between groundwater heads in the aquifer and shallow
groundwater table in the semi-pervious layer. The finite element
technique is used because it is easy to deal with the problem and it
has less numerical problems. Then, the groundwater conditions in
the study area were simulated using the modified model. Three
solution alternative were applied to chose the suitable one .