ارزیابی کیفیت آب رودخانه کارون در محدوده شهر اهواز بر اساس استانداردهای موجود

نوع مقاله : پژوهشی اصیل (کامل)

نویسندگان
1 دانش‌آموخته‌ی کارشناسی ارشد مهندسی محیط زیست، دانشکده مهندسی عمران و معماری، دانشگاه شهید چمران اهواز
2 استادیار دانشکده مهندسی عمران و معماری، دانشگاه شهید چمران اهواز
3 استاد، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی جندی شاپور، اهواز
چکیده
با توجه به نرخ افزایش جمعیت و به تبع آن افزایش حجم پساب‌های شهری و صنعتی، کیفیت آب در دسترس بشر به شدت در معرض تهدید قرار گرفته است. تحقیق حاضر با استفاده از توسعه یک مدل شبیه‌سازی، به بررسی و ارزیابی تغیییرات کیفیت آب رودخانه کارون در محدوده شهری اهواز با استفاده از استانداردهای موجود پرداخته است. پس از تهیه مدل، واسنجی و صحت سنجی آن، تغییرات کیفیت رودخانه در محدوده مورد مطالعه در فصول مختلف سال مورد بررسی قرار گرفت. نتایج شبیه‌سازی کیفیت رودخانه در فصول سال حاکی از وابستگی شدید متیغرهای کیفی رودخانه به فصل سال است، به طوریکه در فصل تابستان (خشک‌ترین فصل سال) و پاییز (مرطوب‌ترین فصل سال) تغییرات اکسیژن محلول در طول بازه مورد مطالعه به ترتیب برابر 49 درصد و 15 درصد بوده است. مقایسه شرایط موجود در رودخانه با استانداردهای ملی و بین‌المللی حاکی از آن است که به جز فصل پائیز که رودخانه بیشترین دبی عبوری را تجربه می‌کند، وضعیت کیفیت آب در رودخانه اکثر استانداردهای موجود را تامین نمی‌کند. سناریوی آخر مدلسازی رودخانه در این تحقیق به این پرسش پاسخ می‌دهد که اگر همه پساب‌های ورودی به رودخانه در طول محدوده مورد مطالعه استانداردهای موجود تخلیه پساب را رعایت کنند، آیا شرایط کیفیت رودخانه به حالت مطلوب خواهد رسید؟ نتایج به دست آمده نشان می‌دهد که پاسخ این پرسش منفی است و حتی با وجود رعایت حداقل استانداردهای موجود توسط صنایع و آلاینده‌های ورودی به رودخانه، کیفیت رودخانه در شرایط مطلوب قرار نمی‌گیرد. این امر مبین اهمیت در نظر گرفتن شرایط خاص هیدرولیکی هر رودخانه و همچنین اثر تغییرات زمانی بر کیفیت رودخانه در بروزرسانی استانداردهای موجود است.

کلیدواژه‌ها

موضوعات


عنوان مقاله English

Assessment of Water Quality in the Karun River of Ahvaz City According to Existing Standards

نویسندگان English

Mahsa Shafiee 1
Mohamad Azizipour 2
Hossein Sasani 2
Afshin Takdastan 3
1 Graduate Student at Faculty of Civil Engineering and Architecture, Shahid Chamran University of Ahvaz
2 Assistant Professor, Faculty of Civil Engineering and Architecture, Shahid CHamran University of Ahvaz
3 Professor of Environmental Engineering ,Ahvaz jundishapur university of medical sciences
چکیده English

The quality of water available to humans has been seriously threatened due to population growth and the resulting increase in urban and industrial wastewater. To evaluate changes in the water quality of the Karun River in the urban area of Ahvaz, a simulation model was developed and used to assess the river's water quality based on existing standards. Results show that the quality variables of the river are highly dependent on the season of the year, with the largest changes in dissolved oxygen occurring during the driest and wettest seasons. Comparison of the river's current situation with national and international standards indicates that the water quality does not meet most standards, except during the autumn season when the flow rate is highest. Even if all effluents entering the river comply with existing discharge standards, the quality of the river does not meet desired standards. This highlights the importance of considering specific hydraulic conditions and the effect of time on river quality when updating existing standards.

کلیدواژه‌ها English

River Water Quality
effluent
water quality modeling
QUAL2KW
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