الفهرس 
Introduction and Literature ReviewOnly 14 pages are availabe for public view
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Abstract
Summary
The thesis consists of three chapters: Chapter (I) Introduction and literature review; chapter (II) Materials and Methods and chapter (III) Results and dicusssion.
Chapter (I) presents details introduction aboutwater resources in Libya and groundwater of Al Jabal Al Akhdar. Also, presents physical, chemical and biological characteristics of groundwater. Additionally, chapter (I) deals with the geoelectrical resistivity survery and geolgoy of Libya.
Chapter (II) offers the detailed locations of wells in study area and used methods in analysis.Groundwater samples are collected from 10 wells atdifferent locations. The physico-chemical parameters such as pH, temperature, DO, EC TDS, calcium,magnesium, total hardness, sodium, potassium, nitrate, sulfate, iron, manganese and chloride are determinedusing standard methods and compared with WHO limits. The bacteriological analysis use the memberane filtre method (MF). For geoelectrical resistivity study, twenty seven vertical electrical sounding (VES’s), using Schlumberger array were carried out.
The obtained results in chapter (III) indicate that many of the estimated physico-chemical parameters of samples (1-7) are less than the permissible limits of WHO while, the results of the samples (8, 9 and 10) exceeds the permissible limits of WHO, reflecting that the wells arecontaminated and unfit for human consumption. Similar indicators are obtained by evaluation of the groundwater for irrigation uses.from bacteriolgoical study, for well numbers (8, 9 and 10) have faecal contamination of groundwater with coliform bacteria because the number of coliforms is highly comparative with theacceptable value whilenone of other wells were recorded any coliform number.
The interpretation of VES curves showed that the geoelectrical succession consists of threecross sections (A-A`; B-B` and C-C`).The cross section AA’ section includes two layers:First geoelectric layer: at the north Apollunia Formation with high resistivity that ranges from 450 to 480 ohm.m at the part over sea level. This resistivity decreases with depth from 36 to 39 ohm.m. Thickness of this layer varies between 10 m and 200 m. This resistivity reflect limestone and chalky limestone and it is wetted by the sea water so it decreased with the depth. The secondgeoelectric layer at the north Darnah Formation is divided laterally into two units. First unit recorded resistivity rang of 200 ohm.m which represents the effect of sea water intrusion in this unit which consists mainly of limestone.The second unit in the middle and south of the cross section limestone is dry and massive so it recorded resistivity rang of 440 to 2000 ohm.m and increased to even 4700 ohm.m and its thickness ranged from 100 to 350 m.
This cross section BB’ section has a nearly north - south direction parallel to the first geoelectric cross section and to the west of it. B-B` includes two layers. Thefirst geoelectric layer at the north Apollunia Formation with high resistivity that ranges from 220 to 420 ohm.m at the part over sea level. This resistivity decreases with depth from 24 to 27 ohm.m. Thickness of this layer varies between 10 m and 150 m. This resistivity reflects limestone and chalky limestone. Second geoelectric layer is at the north Darnahformation and is divided laterally into two units. First unit in the northern part of this section, it recorded resistivity rangeof 20 ohm.m which represents the effect of sea water intrusion in this unit which consists mainly of limestone. Second unit in the middle and south of the cross section, limestone is dry and massive so it recorded resistivity rang of 400 to 650 ohm.m and increased to even 4000 ohm.m and its thickness ranged from 100 to 350 m.
The cross section CC’ section includes two geoelectric layers. The first geoelectric layer at the top with relatively moderate resistivity that ranges from 50 to 135 ohm.m. This resistivity decreases with the increase of clay content. Thickness of this layer varies between 10 m and 50 m. This resistivity reflects Alluvium deposits. The second geoelectric layer: at the north Darnah Formation, the recorded resistivity values range from 4000 to 4880 ohm.m which represent a unit consists mainly of dry limestone.
The measured apparent resisitivities at AB=800m shows that the resistivity values increase in the south direction, which reflect the high salinity water values at the north which attributed to the presence of sea water intrusion