الفهرس 
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Abstract
Groundwater exploration in the study area, lying in the western part
of middle Sinai, is urgently needed regarding its geopolitical position and
the strong desire for its development.
Integrated geophysical study was carried out in the area, including
land magnetic, Vertical Electrical Sounding (VES) and 2-D imaging
techniques.
Land magnetic measurements were carried out in 1279 stations
arranged along 55 parallel N-S profiles separated by 350 m. from each
other. The YES measurements were carried out through 40 sounding
stations, basically located according to the results of the magnetic survey.
Two locations were also selected to perform 2-D imaging measurements
to verify the YES measurements.
Processing and interpretation were carried out to transform the field
measurements into subsurface layering, to reveal the groundwater setup
in the area and hence to judge about its potentiality. Routine corrections
as well as Reducing to the Pole correction were applied to the magnetic
measurements. Separation of the regional magnetic anomalies using a low
pass filter and the residual anomalies using a high pass filter were carried
out to study qualitatively the change in basement depth in the area.
Magnetic modelling was applied to four successive magnetic profiles to
find out, quantitatively, the basement relief, and the appropriate sites for
carrying out the geoelectrical measurements. The interpreted magnetic
data indicated that the depth to the basement surface increases gradually
from 110m. in the eastern part of the study area to 1850 m. in its westernpart towards the Gulf of Suez. The basement block itself was found to be
dissected by several joints, dykes and faults trending mostly NE-SW and
NW-SE. Such structures formed favorable places for groundwater
accumulation and storage, such as grabens and local basins.
The interpreted geoelectrical data revealed a four layers succession
consisting- from top down of:-
Surface layer 3-12 m. thick, 600-2838 Ohm.m. In resistivity,
formed of igneous and sedimentary boulders.
_ Dry sand and gravel at a depth of 3-12m., thickness 18-90 m. and
resistivity 200-763 Ohm.m.
_ Water-bearing sand and gravel at a depth of 25-97 m., thickness of
26-10Sm. and resistivity of 25-280 Ohm.m. This water-bearing
layer is splitted in some places into two sub-layers differing in their
resistivities.
_ A zone of fractured basement in the east or a layer of clayey sand
to sandy clay in the west at a depth 110- 241 m.
The interpreted 2-D imaging data confirmed more, or less the results
reached by the interpreted YES data and hence verified the YES
measurements.
The reached results are presented in the form of contour maps and
modeled cross sections for the magnetic data, vertical sections and
extended cross sections for the YES data and 2-D cross sections for the
2-D imaging data. The results of the three geophysical techniques are displayed
together in an integrated version, so as to find the points of agreement,
contradiction or failure.
Statistical treatment of the parameters reached for the water-bearing
formation alone made it possible locating five sites for which the aquifer
potentiality is relatively the best. At this sites the specification for the
wells to be drilled is concluded such as site coordinates, ground elevation,
total depth of well, expected static water level, depth and length of well
screen, need for gravel back .... etc.
Chapter four alone is set aside for the groundwater potentiality of the
area as a whole including the five locations recommended for the drilling
of water wells.