الگوی توزیع مکانی کیفیت آب رودخانه پیر‌غار با استفاده از شاخص کیفیت آب -(NSFWQI)‌ و سامانه اطلاعات جغرافیایی (GIS)

محورهای موضوعی : آلودگی های محیط زیست (آب، خاک و هوا)

رسول زمانی احمدمحمودی ¹ , فاطمه قائدامینی ² , مریم نجفی ³

1 - دانشیار گروه محیط‌زیست، دانشکده منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد، ایران. * (مسول مکاتبات)
2 - کارشناسی ارشد بوم‌شناسی آبزیان، گروه شیلات و محیط زیست، دانشکده منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد، ایران
3 - کارشناسی مهندسی بهداشت محیط، شرکت آب و فاضلاب استان چهارمحال و بختیاری، ایران.

تاریخ دریافت : 1395/08/05 تاریخ پذیرش : 1396/05/04 تاریخ انتشار : 1400/02/01

کلید واژه: استان چهارمحال وبختیاری, NSFWQI, رودخانه پیرغار, ‌GIS,

چکیده مقاله :

زمینه و هدف: با توجه به اهمیت رودخانه پیرغار و همچنین تخلیه آلاینده های مختلف به آن، بررسی کیفی آب رودخانه پیرغار لازم و ضروری به نظر می رسد. از طرفی پهنه بندی آلودگی و ارایه تصویر صحیح از وضعیت کیفی آب های سطحی توسط سامانه اطلاعات جغرافیایی (GIS) باعث می گردد تا هر گونه تصمیم گیری مدیریتی که اثرات محیط زیستی آن به صورت مستقیم یا غیرمستقیم متوجه آب های سطحی کشور باشد، با آگاهی بیش تری اتخاذ گردد.روش بررسی: به همین منظور نمونه های آب از 5 ایستگاه در طول مسیر رودخانه در بهمن ماه 94 برداشت شد و پارامترهای کیفی آب شامل: pH، کدورت، دما، DO، BOD، TS، نیترات، فسفات و کلی فرم مدفوعی مورد آزمایش قرار گرفت. نمونه برداری، آماده سازی و آنالیز نمونه ها، طبق روش استاندارد متد انجام پذیرفت. داده های حاصل با استانداردهای جهانی مقایسه شد و بر اساس شاخص NSFWQI مورد تجزیه و تحلیل قرار گرفت و سپس مسیر رودخانه با استفاده از نرم افزار GIS پهنه بندی گردید.یافته ها: براساس نتایج شاخص NSFWQIکیفیت آب رودخانه پیرغار در همه ایستگاه ها در وضعیت های متوسط تا خوب قرار دارد. در بهترین وضعیت، شاخص کیفی NSFWQI مربوط به ایستگاه اول با عدد 78 بوده و پایین ترین مقدار مربوط به ایستگاه پنجم با شاخص کیفی 66 می باشد. درنتیجه، آلودگی از ایستگاه 1 به سمت ایستگاه های بعدی بیش تر شده و کیفیت آب کاسته شده است.بحث و نتیجه گیری: در نتیجه جهت مدیریت اصولی آب این رودخانه باید تمهیداتی اندیشیده شود و برنامه پایش کیفی آب در آن استمرار یابد.

چکیده انگلیسی:

Background and Objective: Due to the importance of Pireghar River and discharging of various pollutants in this river, investigation of quality of Pireghar River seems to be necessary. On the other hand, the pollution zoning and give a correct image about quality status of surface water by geographic information system (GIS) to make any management decision with more awareness.Method: Water samples from 5 station along the river was collected on February 2015, and water quality parameters namely pH, turbidity, temperature, TS, BOD, DO, nitrate, phosphate, and coliforms was examined. Sampling, preparation and analysis of samples was done according to the standard methods. The resulting data was compared with world standards and then analyzed using NSFWQI index and finally path of river was zoned using GIS.Findings: Based on NSFWQI index Pireghar river water quality was fluctuated between good and medium status at all stations. The highest NSFWQI quality index was related to the first station with quality index of 78 and lowest value was related to the fifth station with quality index of 66. As a result, pollution was increased from the first station to the next stations, and water quality has decreased.Discussion and Conclusion: In conclusion, for regular management of the river`s water some legislation should be determined and its monitoring program should be continued. 

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