تشخیص و پهنه‌بندی مکانی شاخص کیفی چند متغیره آب زیرزمینی با استفاده از ترکیب روش فازی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکترای منابع آب، دانشکده مهندسی عمران، دانشگاه تهران

2 دانشیار مهندسی عمران، دانشکده عمران، دانشگاه صنعتی شریف، تهران

3 دانش‌آموخته دکترای عمران- آب، دانشکده فنی، دانشگاه تهران

4 کارشناس ارشد مدیریت منابع آب، شرکت آب منطقه‌ای تهران

چکیده

روشهای ارزیابی کیفیت منابع آب زیرزمینی و تشخیص موقعیتهای مناسب برداشت برای شرب و استفاده کشاورزی، از مسائلی است که به‌لحاظ کاربردی بودن، استفاده فراوانی دارد. ارائه یک روش پهنه‌بندی کیفی جدید با تعیین حدود و شاخص کیفی مناسب از اهم اهداف تحقیق حاضر بود. در این مطالعه پس از ارزیابی متغیر‌های کیفی آب در هر چاه پایش، روشی کارا به‌منظور استنتاج شاخص کلی کیفیت آب با به‌کارگیری ساختار تشخیص و ارزیابی فازی به‌کار برده شد. در ادامه، اطلاعات 217 چاه برداشت آب در دشت قزوین که شامل 12 پارامتر شیمیایی کیفیت آب بود، به‌منظور ارزیابی شاخص کیفی پیشنهادی مورد استفاده قرار گرفت. در نهایت، شاخص کیفی فازی جدید با استفاده از یکی از جدیدترین رویکردهای تخمین مکانی بهینه شده توسط الگوریتم ژنتیک به کل منطقه دشت قزوین تعمیم یافت. نتایج نشان‌دهنده کارایی روش پیشنهادی در پهنه‌بندی کیفی آب زیرزمینی بود. یکی از نقاط قوت روش پیشنهادی، پرهیز از تجمیع قطعیت‌گرایانه کیفیت و ارائه شاخصی پیوسته به‌منظور ارزیابی کیفی آب زیرزمینی بود.

کلیدواژه‌ها


عنوان مقاله [English]

Recognition and Spatial Mapping of Multivariate Groundwater Quality Index using Combined Fuzzy Method

نویسندگان [English]

  • Mohsen Nasseri 1
  • Masoud Tajrishy 2
  • Mohammad reza Nikoo 3
  • Jamal Zaherpour 4
1 Ph.D. Student of Water Resources, Dept. of Civil Eng., Tehran University
2 Assoc. Prof. of Civil Eng., Dept. of Civil Eng., Sharif University of Tech., Tehran
3 Grad. Ph.D. of Civil and Water Eng., Dept. of Eng., Tehran University, Tehran
4 M.Sc. of Water Resources Management, Tehran Regional Water Company, Tehran
چکیده [English]

Methods for evaluatingthe quality of groundwater resources and recognition of appropriate locations for urban and agricultural water demand has been known as an important item in water resources planning. The main focus of this paper has been addressed a new water quality mapping based on coupling of fuzzy approximation and water quality indexing. In this paper, after indexing water quality in each monitoring well, based on fuzzy reasoning a new global fuzzy indexing has been presented. In this regard, 12 water quality parameters for 217 monitoring wells in the province of Ghazvin in the north have been used. In the final step, map of fuzzy evaluation over the area of interest has been provided based on an optimized new spatial approximation via Genetic Algorithm (GA). The results showed the capability of the proposed methodology for groundwater quality mapping. The most important contribution of this paper is successful combination of fuzzy reasoning and water quality indexing as a continuous function for evaluating groundwater quality mapping.

کلیدواژه‌ها [English]

  • Groundwater
  • Water Quality Index
  • Water Quality Zoning
  • fuzzy approximation
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