استفاده از مدل های Fuzzy logic و AHP برای اصلاح مدل GALDIT در ارزیابی آسیب پذیری آبخوان ساحلی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد دانشکده منابع طبیعی و محیط زیست، دانشگاه آزاد اسلامی واحد علوم تحقیقات تهران.

2 استادیار گروه سنجش از دور و سیستم اطلاعات جغرافیایی، دانشکده منابع طبیعی و محیط‌زیست، دانشگاه آزاد اسلامی، واحد علوم تحقیقات تهران

3 دانشگاه تهران - پردیس ابوریحان

چکیده

آب‌های زیرزمینی در نواحی ساحلی به عنوان منبع تامین‌کننده آب شرب از اهمیت زیادی برخوردار هستند. نقشه‌های آسیب‌پذیری آب زیرزمینی می‌توانند درراستای حفاظت از کیفیت منابع آب زیرزمینی استفاده شوند. از اینرو در این مطالعه، مدل GALDIT برای ارزیابی و تعیین نواحی آسیب‌پذیر در آبخوان‌ ساحلی قره‌سو-گرگانرود نسبت به پیشروی آب ‌شور به‌کار رفته است. مدل GALDITاز مدل‌های رتبه‌ای می‌باشد و در هر منطقه بایستی کالیبره شود. نوآوری این مطالعه استفاده از مدل Fuzzy logic به منظور اصلاح مدل GALDIT است. علاوه بر این وزن‌های این مدل، با روش تحلیل سلسله مراتبی (AHP) اصلاح شد. سپس از ضریب همبستگی پیرسون برای اعتبارسنجی نتایج استفاده گردید. نتایج ضریب همبستگی بین مدل Fuzzy-AHP و GALDIT-AHP با غلظت TDS به ترتیب 63/0 و 51/0 حاصل شد. در نتیجه مدل بهینه برای ناحیه مورد مطالعه مدلFuzzy-AHP می‌باشد. نقشه آسیب‌پذیری نهایی نشان داد که نواحی شمال‌غرب و غرب آبخوان آسیب‌پذیری زیاد به پیشروی آب شور دارند. مدل Fuzzy logic می‌تواند به عنوان روشی کارآمد جهت اصلاح مدل GALDIT به کار رود و به نتایج حاصل از آن اطمینان نمود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Using Fuzzy logic and AHP models to modify GALDIT model in coastal aquifer vulnerability assessment

نویسندگان [English]

  • Mojgan Bordbar 1
  • Aminreza Neshat 2
  • Saman Javadi 3
1 Msc student of GIS/RS, Faculty of Natural resources and Environment, Science and Research Branch, Islamic Azad University, Iran
2 Department of GIS/RS, Faculty of Natural Resources and Environment, Science and Research Branch, Islamic Azad University, Iran
3 Department of Irrigation and Drainage, Aburaihan Campus, University of Tehran, Iran.
چکیده [English]

Groundwater as a source of drinking water is very important in coastal aquifers. Groundwater vulnerability maps can be used to protect the quality of groundwater resources. Therefore, in this study, GALDIT model was applied to assess and determine vulnerable areas to seawater intrusion in Gharesoo-Gorgan Rood coastal aquifer. The GALDIT model is a type of the rating models and needs to be calibrated in each study area. The novelty of this study is to use the Fuzzy Logic model to modify the GALDIT model. In addition, the weights of this model were modified by Analytical Hierarchy Process (AHP). Then, the pearson’s correlation coefficient was used to validate the results. Correlation coefficient between Fuzzy-AHP and GALDIT-AHP models with TDS concentration was 0.63 and 0.51, respectively. As a result, the optimal model for the study area is the Fuzzy-AHP model. The results of the vulnerability map indicate that the northwest and west of aquifer areas are highly vulnerable to the seawater intrusion. The Fuzzy Logic model can be used as an effective way to modify the GALDIT model and ensure its results.

کلیدواژه‌ها [English]

  • vulnerability
  • AHP
  • GIS
  • Fuzzy logic

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