الفهرس 
CHAPTER ONE INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Groundwater resources play an essential role in confronting the
scarcity of water resources in arid regions. The current study aims to
identify the physical properties of the Al-Hammam area aquifers North
Western Desert. The integrated geophysical tools, especially Gravity,
Electrical, and Electromagnetic methods as well as Joint inversion of
Electrical and Electromagnetic data were used to calculate the depth of the
basement rocks, determine the main fault trends affecting the region,
identify the different geoelectrical units and their horizontal extension,
determine the values of the true resistivity and their depths from the surface
of the earth, in addition to determine water-bearing unit. The
hydrogeochemical method was also used to evaluate the groundwater in
the study area.
The use of Remote Sensing and GIS data showed that the steepest
areas appear in the central and northern parts of the study area.
Groundwater may be present in faults, fractures, joints and bedding planes
for lineaments of the study area. Most of the study area has a high potential
for groundwater, a higher rate of infiltration, and a low runoff ratio. Also,
most of these areas are bare land or scrubland with some developed region.
Gravity method has been used to delineate the subsurface structures
and basement depth estimation. The results indicate that the major
structure trends are aligned in NW-SE and NE-SW while the minor
structures are alignment in E-W, WNW-ESE, ENE-WSW, NNE-SSW, NS, and NNW–SSE directions. The basement depth surface varies from
1254 to 5650 m. It was found that it is very deep at the eastern and
southeastern parts of the study area which have values more than 5000 m.
This indicates that a thick sedimentary cover. The depth decreases
ABSTRACT
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gradually in southwestern and western directions to reach depths of less
than 1230 m.
Twenty Electrical and eighteen Electromagnetic stations were
measured. Joint inversion of Electrical and Electromagnetic data was used
to determine the various geoelectric units and water-bearing units. Four
geoelectrical units have been identified in the study area, where the second,
third and fourth units represent the aquifers.
The hydrogeochemical study included (32) groundwater samples
from drilled wells in the study area to evaluate groundwater. These samples
were analyzed to determine the concentrations of major elements (cation
and anion) with different physicochemical parameters (pH, TDS, and EC)
and evaluate these samples for irrigation purposes.