غلاف الجمعية الجيولوجية -1
INSTRUCTIONS TO AUTHORS -1
All rights reserved -1
A Scientific International Journal Published By -1
EDITORIAL BOARD -1
Editor-in-Chief: -1
Prof. Dr. Selim Zeidan -1
Associate Editors: -1
Correspondence: -1
7 El – Obour Buildings, Flat 85 -1
Cairo, Egypt -1
Tel. (02) 2627061 , Email:egs@link.net -1
رقم الايداع -1
رثاء -1
SELIM ZEIDAN1 -1
Note: -1
Family names are arranged in alphabetical order. -1
EGS Board -1
CONTENT -1
1 -1
2 -1
3 -1
4 -1
5 -1
The laboratory measurements of porosity (%) were carried out on the rock samples. Each sample is well cleaned and dried. The dried and cleaned plugs were individually placed in the matrix cup of small volume porosimeter (model: Helium Porosimeter 30... -1
Horizontal Permeability: -1
Oil Saturation Determination: -1
So = Vo/Vp -1
Water saturation: -1
SUMMARY AND CONCLUSION -1
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9 -1
10 -1
Legend -1
Fig. (3): Geoidal height (the reference ellipsoid used is WGS 84). -1
Fig. (4): Location of some hot (or high) spots in Africa. -1
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The depth to the source of magnetic anomalies is valuable and important information in any geophysical interpretation of subsurface structures. In order to estimate the volume of the mineralization zone, 3D-Eular Deconvolution and 2-D Power Spectrum m... -1
(3) -1
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INTRODUCTION -1
The mutual tectonic displacements of the lithospheric blocks take place within the deep fractures dividing them into hundreds and thousands kilometers long. It is possible to suggest that the reason of the accumulation of considerable local shift def... -1
The short-arc method: -1
RESULTS AND DISCUSSIONS -1
CONCLUSION -1
REFERENCES -1
13 1
الخلاصـة: لدراسة تواجد العلاقة بين مصادر تغذية المياه الجوفية وظروف تواجدها بمنطقة الصالحية الجديدة التى تقع محصورة بين ترعة الأسماعيلية من الشمال وطريق القاهرة الأسماعيلية الصحرواى من الجنوب تم إجراء استكشاف جيوكهربىباستخدام توزيع اشلمبرجير لعمل الج... 1
وقد أظهرت الدراسة أن الطبقتين أ، ب الحاملتين للميه الجوفية تتعرضان للتغذية من مياه الترع والرى (الصرف الزراعى) وأن مياه الرى هى أكثر تأثيراً على الطبقة أ حيث يلاحظ زيادة ملوحة مياه هذه الطبقة، أما مياه الترعة (ترعة الاسماعيلية) فهى التى تؤثر على ملوحة... 1
INTRODUCTION 1
Plagued areas of land reclamation in the desert lands suffer from the lack of water resources and face some problems such as salinization of groundwater and deficiency in productivity. In this sense, geophysical studies are required to determine the d... 1
The proposed study area is located on the southern eastern edge of the Nile Delta, which represents the extension of the delta along the Cairo-Ismailia Desert Road new Salhyiah area. This area suffers from a lack of groundwater and increased salinity.... 1
According to the previous geological works, the stratigraphy of the investigated area was differentiated by many authors such as Shukri and Ayouty (1956), Shata (1956), Said and Beheri (1961), El Fayoumy (1968), Shata and El Fayoumy (1970), El Shaz... 2
The area east of the Nile Delta is occupied by Quaternary and Tertiary deposits. They have a thickness of 400-900m (Hefny, 1980). El Salhyiah area is covered by Quaternary deposits consisting of young aeolian sediments at the top and old deltaic depo... 2
According to Sallouma (1983), Gad (1995) and Dahab, et al. (2007), the main aquifer in the area is formed of Quaternary deposits (sand, sandstone, clay and shale). The clay and shale separate the aquifer into an upper unit and a lower one such that th... 2
FIELD SURVEY 2
Two geoelectrical measurements are applied; the first is Vertical Electrical Sounding (VES), the second is Two-dimensional electrical resistivity imaging (2-D), Figure (1). 2
a- Vertical Electrical Soundings (VES): 2
The area was covered by a total of 10 Vertical Electrical Soundings (VES) (Fig. 1). The Schlumberger 4-electrode configuration was applied, where the maximum current electrode separation (AB/2) used was 700 meters. The D.C. resistivity meter (Terramet... 2
b- Geoelectrical imaging (2-D) : 2
The geoelectrical imaging (tomography) survey has been applied along three profiles 2-D N0.1, 2-D N0.2 and 2-D N0.3 at locations of VES. 9, VES.6 and VES.10 respectively, with a profile 460-m in length. The main objective of conducting such a techniqu... 2
Fig. (1): Location map of the VES stations, Well, 2-D geoelectrical resistivity imaging and the geoelectrical cross sections in El-Salhyiah El-Gedidah 2
INTERPRETATION AND RESULTS 3
1- Groundwater Exploration: 4
a- Interpretation of the Vertical Electrical Sounding Data: 4
Figure (2) shows the resistivity sounding curves with different varieties: KQQH, QQQ, HK and AH types which have been carried out in the investigated site. From this figure, it is obvious that the apparent resistivity values at the surface and near th... 4
The detailed quantitative interpretation of the field measurements was carried out by using a computer program “RESIST” written by Velpen (1989). It is an iterative and inverse modeling program for interpreting the resistivity curves in terms of a lay... 4
The quantitative interpretation of the geoelectrical resistivity sounding data is discussed in terms of the geoelectrical parameters of the resulting geoelectrical zones i.e., resistivity and thickness. The resistivities are related to the lithology a... 4
The vertical and horizontal extensions of the detected geoelectrical layers are illustrated as geoelectrical cross sections (A-A’) and (B-B`), figure (3) from north to south and (C-C`) and (D-D`) from west to east direction figure (4). The details of ... 4
b- Interpretation of the imaging profiles : 5
For the interpretation of the imaging data, use was made of the computer program RES2DINV, ver. 3.48a written by Loke (1998). Three imaging profiles were conducted at three sites. The first is close to VES N0.9, in a NE-SW direction, the second lies a... 6
2- Groundwater Conditions: 7
From the geoelectrical cross sections (Figures. 3, 4) and the geoelectrical imaging profiles (Figure. 5), it is obvious that groundwater occurrence in the investigated area could successfully recognize two main water-bearing layers; the upper one repr... 7
The lower layer “B” is thick with much relatively higher resistivity values than the upper zone (more than 20 Ohm.m). The resistivity distribution within this layer reflects anomalous flow layers where the effect of recharging water has extended later... 7
The groundwater potentiality of these layers in the area has been evaluated in view of the distribution of the electrical resistivity exhibited by the concerned layers. This has been achieved through isoresistivity maps for the water bearing layers in... 7
may represent water occurrences, are localized at the southern part of the investigated area. 7
The groundwater potentiality within the concerned layers increases by increasing the resistivity values due to increasing the density of the water saturation. On the other hand, the groundwater potentiality decreases by decreasing the resistivity valu... 7
According to the resistivity distribution (Fig. 6), layer “A’ reflects degree of recharging water from drain canal that lies to the north of the investigated area and the infiltration water due to irrigation within the concerned layer increasing towar... 7
Figure (9) shows the horizontal and vertical resistivity variations of the different layers and the impact of recharging resources on the water bearing layers in the investigated the area. 8
SUMMARY AND CONCLUSIONS 9
A geoelectrical study has been carried out with the purpose of detecting groundwater existence and delineating the relation between feeding resources and groundwater. Geoelectrical resistivity sounding and two-dimensional electrical imaging measuremen... 9
The results of the geoelectrical resistivity sounding and geoelectrical imaging revealed that the subsurface succession in the area consists of three main layers without surface layer. The surface layer has a wide resistivity range which reflects a va... 9
According to this study the following findings can be concluded: 9
Generally, the resistivity values and the thickness of the water bearing layers are increasing toward the north direction in the study area and increasing the groundwater potentiality of water, and water quality. The best site for production wells is... 9
This study is an example which can be applied on large scale. Accordingly, reaching a decision for locating production wells needs carrying out further integrated geoelectrical studies to detect the sites with the best conditions, concerning thickness... 9
REFERENCES 9
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Airborne Spectrometric Data: -1
Airborne Magnetic Data -1
REFERENCES -1
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