بنية جريان المياه الجوفية الحرة العائدة لتوضعات البازلت المشقق في محيط بحيرة قطينة ودوره في نقل الملوثات
Abstract
وقع اختيارنا لهذا البحث نتيجة ملاحظة وجود ملوثات في المياه الجوفية العائدة للبازلت النيوجيني المشقق في محيط بحيرة قطينة. وقد استخدمنا لتنفيذ البحث الجولات الحقلية العملية, التي نفذنا خلالها عملية مسح هيدروجيولوجي, كما قمنا بتحديد شبكة آبار للمراقبة خلال العامين 2004-2003. وقد أكد تحليل عينات المياه المأخوذة من شبكة الآبار وجود التلوث, إضافة إلى تأكيده لتمركز أكبر قيم لشوارد F- قرب الشركة العامة للأسمدة وإثباته للدور الضعيف لذي يلعبه الجريان الجوفي في نقل الملوثات. هذا وقد تم تأكيد النتائج السابقة من خلال حساب زمن الرشح ثم حساب التصريف المفترض لمعرفة وجود اتصال بين مياه البحيرة والمياه الحرة. وبناءً عليه وضعنا خريطتي هيدروإيزوهيبس أكدتا ما توصلنا إليه من نتائج التحاليل الكيميائية وحساب زمن الرشح, وهكذا فقد أتضح تماماً دور الجريان في نقل الملوثات. حيث حد مخروط الانخفاض المحلي الموحد قرب الشركة العامة للأسمدة من انتشار الملوثات F-, القادمة من الشركة المذكورة, والتي بينت نتائج البحث أنها أهم مصدر للتلوث في منطقة الدراسة .
We have chosen to do this research as a result of finding contaminants in the Cracked Neogene Basalt around Qutina Lake. The research was carried out through practical field studies in which we had a hydrogeoelogical scan and we marked a net of observation wells for 2003 -2004. The water samples which were tested from the net were confirmed to be contaminated. Moreover, the tests showed a centralization of the highest (F-) values especially in the chemical ith area of General Fertilizer Company. The study has also proved the effect, the ground water flow has in moving the contaminants. The previous results were confirmed through calculating the filtration period and the presupposed discharge as a way to prove a link between the water of the lake and the unconfined aquifer. According to what we had so far, we put two hydroisohpis maps which also proved the results we got through chemical analysis and the calculated filtration time. Therefore, undoubtedly the flow plays a part in moving the contaminants. We can see the drawdown cone of the area near the General Fertilizer Company reduced the pollution; which was mainly caused by the work of the company, which speeds the ( F- ) anion. All the results wear clarified in this field study.
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