تـأثـير قـناة الـثرثار دجـلة في الخصائص البيئيـة لنهر دجـلة شمال بـغـداد، الـعراق
محتوى المقالة الرئيسي
الملخص
هذه الدراسة تعتبر الأولى من نوعها بعد العام 2003. صُممت من اجل هدفين: الأول توضيح تأثير التغيرات الموسمية في مؤشرات الماء الفيزيائية والكيميائية لقناة الثرثار- دجلةفضلا عن نهر دجلة والثاني تقييم مدى تأثير القناة على بعض الخصائص البيئية للنهر عند منطقة الدراسة. جمعت عينات الماء شهريا للفترة من كانون الثاني الى كانون الأول 2020. تم دراسة تسعة عشر مؤشراً بيئيا شمل درجات حرارة الماء والهواء والكدرة والتوصيلية الكهربائية والملوحة والاوكسجين الذائب ونسبة الاشباع للأوكسجين والمتطلب الحيوي للأوكسجين والاس الهيدروجيني والعسرة الكلية والكالسيوم والمغنيسيوم والكبريتات ومجموع المواد الصلبة الذائبة ومجموع المواد الصلبة العالقة والقاعدية الكلية والبيكاربونات والنترات والفوسفات. بينت النتائج ان مياه النهر والقناة تتأثر بدرجة حرارة الهواء وانها جيدة التهوية وتميل نحو القاعدية بدرجة طفيفة جدا. كما ان الاوكسجين تجاوز نسبة الاشباع مرات عديدة وان المتطلب الحيوي للأوكسجين لم يتجاوز درجة 5 ملغم/لتر. بينت الدراسة أيضا ان القيم العالية للتوصيلية وللملوحة وللمواد الصلبة الذائبة وللعسرة الكلية وللكالسيوم وللكبريتات للقناة زادت من قيمها في نهر دجلة بعد الالتقاء مباشرة بينما القيم الواطئة للكدرة وللمواد الصلبة العالقة وللقاعدية الكلية وللبيكاربونات للقناة قللت من قيمها في النهر أسفل منطقة الالتقاء مباشرة. عموماً يمكننا ان نستنتج ان ذراع الثرثار يؤثر بنهر دجلة من خلال زيادة او نقصان الخصائص الفيزيوكيمياوية للنهرضمن منطقة الدراسة.
Received 9/7/2021
Accepted 24/10/2021
Published Online First 20/5/2022
تفاصيل المقالة
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