Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Egypte → The Suitability of the water resources for agricultural use in some regions of eljabal el-akhder in Libya

Alexandria University (2013)

The Suitability of the water resources for agricultural use in some regions of eljabal el-akhder in Libya

Jaballah, Awad Mohamed

Titre : The Suitability of the water resources for agricultural use in some regions of eljabal el-akhder in Libya

Auteur : Jaballah, Awad Mohamed.

Etablissement de soutenance : Alexandria University

Grade : Doctor of Philosophy (PhD) in Agricultural Sciences 2013

Résumé partiel
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.

Présentation étendue (EULC)

Page publiée le 14 mars 2019