ارزیابی راهکار‌های کاهش شوری آب رودخانه کارون با استفاده از سناریو‌های مدیریتی

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه مهندسی سازه های آبی، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران، ایران

چکیده

رودخانه کارون بزرگترین و طولانیترین رودخانه ایران است که در سالهای اخیر بارگذاری منابع آلاینده موجب افزایش شوری آب رودخانه شده است. هدف از این تحقیق، بررسی راهکارهای مدیریتی برای کاهش شوری رودخانه بصورت  سناریوهای حذف و کاهش بارگذاری منابع آلاینده نقطهای در محدوده ملاثانی تا فارسیات (مهمترین بازه تراکم جمعیتی، صنعتی و کشاورزی) با مدل MIKE11است. نتایج سناریوی حذف منابع آلاینده نشان داد، حذف منابع کشاورزی در فصل خشک و حذف منابع صنعتی و شهری در فصل تر به ترتیب در بالادست و پاییندست شهر اهواز تاثیر زیادی در کاهش شوری رودخانه دارد. نتایج سناریوی کاهش نشان داد، کاهش از مرز بالادست در انتهای محدوده مطالعاتی در فصل تر و خشک به ترتیب با متوسط کاهش 35/10و 26/10درصد شوری رودخانه مؤثر است. نتایج شبیهسازی گزینههای ترکیبی نشان داد که، سناریوی کاهش %52شوری از مرز بالادست همراه کاهش %30از منابع نقطهای در دو فصل تر و خشک به ترتیب با متوسط 60و 46درصد کاهش شوری عملکرد بهتری نسبت به سایر گزینهها در کاهش شوری رودخانه دارد. مقایسه نتایج سناریوهای برتر با حدود مجاز استاندارد شوری آب نشان داد که در هر دو فصل تر و خشک، شرایط حد مجاز آب شرب و کشاورزی قابل تأمین است .

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Evaluation of Karun River Water Salinity Reduction Strategies Using Management Scenarios

نویسندگان [English]

  • B. Fakouri Dekahi
  • M. Mazaheri
  • J. Mohammad Vali Samani
Department of Water Structures, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
چکیده [English]

Karun River poses the largest and longest river of Iran that its water Salinity has been decreased in recent years owing to pollutant sources loading. The aim of this study is evaluating management practices to reduce river salinity in form of removal and reduction scenarios of point contaminant sources ranging from Mollasani to Farsiat (most critical range of population, industrial and agricultural density) using MIKE11 model. Reduction scenario results showed that the scenario of reducing from upstream boundary at the end of study area is influential on river salinity with the average reduction of 35.10 and 26.10% in wet and dry seasons, respectively. Results related to the simulation of combined options implied that the 52% reduction scenario from upstream boundary together with decreased point sources by 30% in both wet and dry seasons, respectively, with an average salinity of 60 and 46% outperform other options to reduce the river salinity. Comparing the results of premier scenarios with standard water salinity limits showed that in both wet and dry seasons, standard limit conditions connected with drinking and agricultural water could be met. The outcomes of this research demonstrate that rivers water quality can be increased by employing contaminant sources management strategies.

کلیدواژه‌ها [English]

  • Karun River
  • Management Strategies
  • Loading Removal
  • Loading Reduction
  • MIKE1

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نشریه مهندسی عمران امیرکبیر
دوره 50، شماره 2
خرداد و تیر 1397
صفحه 245-256

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