نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناس ‌ارشد، گروه مهندسی عمران مدیریت منابع آب دانشکده فنی و مهندسی، دانشگاه یاسوج، یاسوج، ایران

2 استادیار، گروه مهندسی عمران مدیریت منابع آب دانشکده فنی و مهندسی، دانشگاه یاسوج، یاسوج، ایران

3 دانشجوی کارشناسی ارشد مهندسی عمران مدیریت منابع آب دانشکده فنی و مهندسی، دانشگاه یاسوج

چکیده

رودخانه‌ها یکی از مهم‌ترین منابع تأمین آب در بخش‌های مختلف ازجمله کشاورزی، آشامیدنی و صنعتی می‌باشند؛ که در سال‌های اخیر به منبعی برای تخلیه فاضلاب شهری، صنعتی و پساب کشاورزی تبدیل‌شده است. با توجه به ظرفیت محدود رودخانه‌ها برای پذیرش آلاینده‌ها دارد به همین دلیل بررسی کیفیت رودخانه‌ها یک امر ضروری می‌باشد. در این پژوهش به‌منظور بررسی کیفیت آب رودخانه گرمارود از سه شاخص کیفیت آب بنیاد ملی بهداشت (NSFWQI)، شاخص آلودگی رودخانه (RPI) و شاخص کیفیت وزنی حسابی آب (WAWQI) برای نمونه‌های مختلف از سه ایستگاه در طی رودخانه در دو بازه زمانی تابستان و زمستانسال 1398 استفاده و مورد ارزیابی قرار گرفت. در این پژوهش جهت محاسبه شاخص‌های NSFWQI و RPI از پارامترهای DO، دما، BOD، کولی فرم مدفوعی، کدورت، TS، pH، نیتروژن آمونیاک و فسفات و برای محاسبه شاخص-WAWQI از پارامترهای TS، نیترات، کلراید، سختی کل، سولفات، منیزیم، کدورت، pH، کلسیم استفاده شد. نتایجحاصل از تجزیه‌وتحلیل پارامترها نشان داد که ارزش شاخص NSFWQI در دامنه 6/75-66/50 ارزش شاخص آلودگی رودخانه (RPI) در دامنه 5/5-2/25 و ارزش شاخص (WAWQI) در دامنه 92/55-33/48 قرار دارد که نتایج هر سه شاخص بیانگر کیفیت نسبتاً خوب ایستگاه شماره 1 و کیفیت بد در ایستگاه‌های شماره 2 و 3 است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Water Quality Assessment of Garmarood River Using the National Sanitation Foundation Water Quality Index (NSFWQI), River Pollution Index (RPI) and Weighted Arithmetic Water Quality Index (WAWQI)

نویسندگان [English]

  • Reza Kkhalili 1
  • Mohammad Parvinnia 2
  • Abolfazl Zali 3

1 M.Sc. Student, Department of Civil Engineering, Faculty of Engineering, Yasouj University, Yasouj, Iran

2 Assist. Professor, Department of Civil Engineering, Faculty of Engineering, Yasouj University, Yasouj, Iran

3 M. Sc. Student, Department of Civil Engineering, Faculty of Engineering, Yasouj University, Yasouj, Iran

چکیده [English]

Rivers are recognized as the most important water supply resources in various sectors, including agriculture water, drinking water, and industrial water. Over recent years, however, urban, industrial, and agricultural sewage have mostly been discharged into rivers. Taking into account that rivers have a limited capacity for toleration of pollutants, river water quality assessment is indispensable. In the present study, three water quality indicators namely the National Sanitation Foundation Water Quality Index (NSFWQI), River Pollution Index (RPI), and Weighted Arithmetic Water Quality Index (WAWQI) were used to assess the quality of Garmarood River water.  Sampling was performed at 3 stations along the river during summer and winter of 2019. A variety of parameters namely DO, temperature, BOD, fecal coliform, turbidity, TSS, pH, NH3-N, and phosphate were measured to calculate NSFWQI and RPI indices. The parameters used to measure WAWQI, included TS, NO3-, chloride, total hardness, SO42-, Mg, turbidity, pH, and Ca. The results obtained from analysis of the above-mentioned parameters showed that the value of NSFWQI, RPI, and WAWQI indices fall within the 50.66-75.6, 2.25-5.5 and 48.33-55.92 ranges. The results obtained from all 3 indices are indicative of relatively high quality of water at station 1 and poor quality of water at stations 2 and 3.

کلیدواژه‌ها [English]

  • NSFWQI
  • River
  • RPI
  • Weighted Arithmetic Water Quality Index (WAWQI)
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