أجريت هذه الدراسة لغرض مراجعة بعض التقنيات المتبعة في اعادة استخدام أو التخلص من المياه المصاحبة للاستفادة منها في الجماهيرية حيث تم ذلك من خلال الاستفادة من خبرات بعض الدول التي سبقتنا في هذا المجال. وعن طريق جمع المعلومات المتعلقة بكميات المياه المصاحبة المنتجة من بعض الحقول النفطية بالجماهيرية وإخضاعها للتحاليل الكيميائية ومعرفة تركيز الملوثات النفطية في هذه المياه ومقارنتها بالمعايير الدولية. وتم ذلك من خلال إختيار حقلي الحمادة وجالو لجمع عينات المياه المصاحبة بمعدل مرتين في كل شهر ولمدة ثلاثة أشهر،تشير النتائج المتحصل عليها في هذه الدراسة أن المياه المنتجة من الحقول التابعة لشركة الخليج العربي للنفط كانت تتراوح بين3227.7 و 58018.5 متر مكعب/يوم،كما تشير النتائج المتعلقة بنوعية المياه المستخرجة من حقل الحمادة بأن درجة تفاعل هذه المياه متعادلة تقريبا في حين أن درجة التوصيل الكهربي تراوحت بين 2,06 – 2,67 dS/m ،وتعتبر عموما متوسطة الملوحة ويمكن إعتبارها ملائمة للزراعة وفق المواصفات القياسية لمياه الري ، كما أن محتواها من العناصر الثقيلة والهيدروكاربون الكلي لم تتجاوز الحدود الحدود الغير مسموح بها في الري. بينما النتائج المتحصل عليها من تحليل عينات المياه المستخرجة من حقل جالو تشير على أن درجة التفاعل مطابقة للمواصفات في حين أن درجة التوصيل الكهربي تجاوزت الحد المسموح به لاستعمال المياه للري حيث تراوحت بين 26,7 – 60,1 dS/m . كما تم إستعراض أهم الطرق المستخدمة في بعض الدول للتخلص من المياه المصاحبة لوضع الخيارات الممكنة لاستعمالها بالجماهيرية . Abstract This study was carried out for the purpose of reviewing some technologies that are usually followed in reuse of or produced water disposal to be recommended for Libya. This was done through investigation of some countries experience in this respect, and through collecting data concerning quantities of produced water from some oil fields in Libya . To determine the produced water quality, Alhamadha and Jalou oil fields were chosen and water samples were collected twice per month for three months. The water samples were analyzed for pH, EC and hydrocarbons contents. The data obtained in this study indicate that the quantity of produced water from Arabian Gulf Petroleum Company ranged from 3227.7 to 5801.5 cubic meter per day. The results also indicate that the pH and EC of the produced water of Alhamadha oil field were neutral (about 7.0) and normal (range between 2.06 – 2.67 ds/m), respectively. The hydrocarbon and heavy metal contents were also within the permissible levels to be used for agriculture irrigation. However, the results obtained from Jalou oil fields produced water analysis indicate that it is not suitable for irrigation especially because of high salinity which was ranging from 27.7 to 60.1 ds/m.
نجوى خليفة المقري (2009)

The objective of this paper was to compare two approaches to land suitability evaluations, Fuzzy MCDA and Boolean, to model the opportunities for sorghum production in the north-western region of Jeffara Plain, Libya. In this paper a number of soil and landscape and climate criteria were identified and their weights specified as a result of discussions with local experts. The Fuzzy MCDA approach was found to be better than the Boolean approach. Boolean logic indicted that the study area has only four suitability classes (highly suitable, moderately suitable, marginally suitable and currently not suitable). In contrast, the results obtained by adopting the Fuzzy MCDA approach showed that the area of study has a greater degree of subdivision in land suitability classes for sorghum. The richer overall picture provides an alternative type of land suitability evaluation to Boolean approaches and allows subtle variations in land suitability to be explored. Index Terms—Fuzzy, MCDA, boolean, uncertainty.
Mukhtar Mahmud Elaalem(8-2012)

This article compares two fuzzy approaches to land suitability evaluations, Analytical Hierarchy Process (AHP) and Ideal Point. The methods were evaluated using a case study which models the opportunities for wheat production under irrigation conditions in the north‐western region of Jeffara Plain, Libya. A number of relevant soil and landscape criteria were identified through a review of the literature and their weights specified as a result of discussions with local experts. The results of the Fuzzy AHP showed that the majority of the study area has membership values to the set of suitability between 0.40 and 0.50, while the results of the Ideal Point approach revealed most of the study area to have membership values between 0.30 and 0.40. While the Fuzzy AHP and Ideal Point approaches accommodate the continuous nature of many soil properties and produce more intuitive distributions of land suitabilities values, the Fuzzy AHP approach was found to be better than Fuzzy Ideal Point. This was due to the latter's tendency to be biased towards positive and negative ideal values
Mukhtar Elaalem, Alexis Comber, Pete Fisher(6-2011)