الفهرس 
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Abstract
,
The world’s surface fresh water resources are relatively meager to
satisfythe needs of various nations. As such, groundwater is the most
suitablesource to cover the gap between water demand and the already
availableresources in many nations. It is, therefore, necessary to develop
newtechniques to locate and estimate groundwater. Geophysical methods
couldcontribute as a useful tool for groundwater investigation as it can
exploresubsurface layers in a short time and more economic to carry out
beforedrilling.
Geophysical methods deal with the application of sound and well
establishedphysical principles to the solution of geological problems. In
geophysical exploration, the geological information of an area can be used to
increaseour knowledge about the potentialities of groundwater, the
determinationof the structures controlling its flow, and the aquifer conditions
(itsrecharge,discharge, and storage).
1.1.Location of The Study Area:
The area under investigation occupies the most southwestern part of
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theWesternDesert of Egypt covering an area of about 90000 Km (Fig. 1-1).
It is locatedbetween latitudes 22° and 24° N, and longitudes 29° and 33° E.
Itsboundariesare the Egyptian - Sudanese border from the south, Aswan -
Kharga& Dakhla Oases from the north, Lake Nasser from the east, and Sir
Tarafawifrom the west.
According to the available data, the study area has been divided into
twosubareas:The first one is named the East Tarafawi area (Fig. 1-2), which
liesbetweenlatitudes 22° 33\ and 23° 52\ N, and longitudes 29° 00\ and
\
30° 06 E, and is situated south of the Kharga Oasis along Darb El Aroain
road.The second area is named the Abu Simbil area (Fig. 1-3), it is located
southof the Aswan city - near the Abu Simbil town and along the Aswan-Abu.