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العنوان
The Suitability of the water resources for agricultural use in some regions of eljabal el-akhder in libya =
المؤلف
Jaballah, Awad Mohamed.
هيئة الاعداد
مشرف / ماهر نسيم جورجى
مشرف / ماجدة ابو المجد حسين
مناقش / صابر عبده جاهين
مناقش / ايهاب محمد مرسى
باحث / عوض محمد جاب الله
الموضوع
Soils.
تاريخ النشر
2013.
عدد الصفحات
v,92, 6 p. :
اللغة
الإنجليزية
الدرجة
الدكتوراه
التخصص
العلوم الزراعية والبيولوجية
تاريخ الإجازة
1/1/2013
مكان الإجازة
جامعة الاسكندريه - كلية الزراعة ساباباشا - الاراضى والكيمياء الزراعية
الفهرس
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Abstract

The country of Libya covers an area of about 1,759,540 square kilometers
spanning three climatic zones: the Mediterranean, the semi-desert, and the vast desert
zone of the northern Sahara with its sprinkling of oases. The present population in
Libya is about 5.6 millions lives mainly in the Mediterranean coastal zone, with a
large proportion in its principal Cities Tripoli and Benghazi. The fertile lands of the
Jeffara Plain in the northwest of the country, Al Jabal Al-Akhder in the northeast, and
the coastal plain east of Sirt, all support a flourishing agriculture, which is dependent
upon rainfall. To the south, separated by a strip of semi-desert, the desert is
encroaching ever nearer the Gulf of Sirt. Records of rainfall distribution show 500
millimeters falling annually on Al-Jabal Al-Akhder, falling to 150 millimeters in the
coastal region around Benghazi and 200-250 millimeters fall annually along the Jebel
Nefussa and the western coast. Along the coast of the Gulf of Sirt, the annual rainfall
decreases rapidly with distance inland, and south of Jebel Nefussa and Al-Jabel Al-
Akhder it similarly diminishes until only a few millimeters are recorded annually at
Sarir in the southeast and Sabha in the southwest.
In the north of Libya, the demand for water is rapidly increasing, forcing the
intense exploitation of groundwater resources, particularly in the fertile lands of the
Jeffara Plain in the northwest and Al-Jebel Al-Akhder in the northeast of the country.
Al-Jabal Al-Akhdar area is an upland area along the northern coast of north eastern
Libya. It is crescent shaped ridge culminating at more than 870 m a.m.s.l, in its central
part. The northern flank consisting of step like plateaus bordered by escarpment. The
southern flanks are gently dipping towards a depression marked by several large
Sebkhas. To the east and mostly to the west, coastal plains are well developed
between the foot of the first escarpment and the sea.
The development of groundwater has increased rapidly during the past ten
years. Most of the water in the Mediterranean coastal zone area in Libya is used for
agricultural purposes, which on average accounts for 62% of the groundwater
consumption. Domestic water use accounts for 33% of the water supplied, and
industrial usage makes up the remaining 5%. However, the rapid increase in
groundwater withdrawals has resulted in lowering the piezometric surface,
particularly in the north regions of the country. There is suspicion that saline intrusion
is occurring along the coast in the north, with upward leakage of poor quality water at
points of heavy abstraction elsewhere.
In Libya, the situation of water supply has become more problematic, as the
population increases rapidly and low rainfall. As a result soon after the discovery of
fresh groundwater in the deserts of southern Libya, the local authority adopted and
implemented a plan of action to address its water deficit problems, mainly through
the implementation of “The Great Manmade River Project” to sustain its economy.
The Libyan government began to design and install the hydraulic infrastructure
needed to exploit the discovered fresh groundwater to the various demand sites along
its Mediterranean coast where the most of the population lives. With the exception of
Al- Jabal Al-Akhdar area, which is not considered to be supplied from the Great
Manmade River Project, as there is the availability of somewhat water resource.
Therefore, there is a need for a comprehensive knowledge and understanding of the
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groundwater resources in these areas for better strategic water management of such
huge projects that underlay the quest for self-sufficiency and national economic
prosperity. The quality of groundwater is equally important as the quantity.
Assessment of groundwater vulnerability to pollution is necessary for feasibility and
development analysis, planning management, and land use decisions.
The overall objective of the current study is to evaluate the groundwater quality
for agriculture purposes using Geostatistics in selected regions in Al-Jabal Al-Akhdar.
The purposes of this assessment are: (1) to evaluate and monitor the status of
groundwater quality and assess its suitability for irrigation; (2) to determine the spatial
distribution of groundwater quality parameters; (3) to generate a groundwater quality
map for the studied area; (4) to proposing of water managements for the low water
quality. Also, there is an urgent need to assessment of the groundwater quality for
livestock and poultry drinking.