تعیین آسیب‌پذیری آبخوان باراندوزچای دشت ارومیه با استفاده از ترکیب شاخص‌های DRASTIC، SI و SINTACS

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه زمین شناسی دانشگاه ارومیه

2 فارغ التحصیل گروه علوم - زمین شناسی

3 دانشکده علوم زمین دانشگاه تبریز

چکیده

با توجه به نیاز روز افزون جوامع بشری به منابع آب زیرزمینی، به ویژه در مناطق خشک و نیمه‌خشک مانند ایران، حفاظت و جلوگیری از آلودگی این منابع امری ضروری تلقی می‌گردد. بدین منظور، ارزیابی آسیب‌پذیری آب‌های زیرزمینی می‌تواند نقشی حیاتی در حفاظت و بهره‌برداری از این منابع ایفا نماید. در دشت باراندوزچای، به دلیل رونق زیاد کشاورزی و استفاده از کودهای شیمیایی، مواد آفت‌کش و عمق کم سطح ایستابی، احتمال آلودگی آبخوان وجود دارد، به همین منظور، ابتدا به پتانسیل‌یابی آلودگی منابع آب زیرزمینی دشت از مدل‌های DRASTIC، SINTACS و SI پرداخته شد و سپس با روش ترکیبی، نقشه نهایی از مناطق آسیب‌پذیر تهیه گردید. مقایسه نتایج به‌دست آمده از مدل‌ها با داده‌های نیترات بر اساس شاخص همبستگی (CI) نشان داد که روش ترکیبی سه مدل دارای همبستگی بیشتری نسبت به مدل‌های منفرد DRASTIC، SINTACS و SI دارد. براساس روش ترکیبی حاصل از سه مدل 25، 40 و 35 درصد مساحت از آبخوان دشت باراندوزچای به ترتیب در محدوده آسیب‌پذیری کم، متوسط و زیاد قرار دارد. با توجه به میزان استاندارد جهانی نیترات، آب دشت برای مصارف شرب مناسب بوده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Determining the vulnerability of Barandouzchi aquifer Plain, Urmia, using the combination of DRASTIC, SI, AND SINSTAC Indices

نویسندگان [English]

  • Sahar Yaghoubi gardvisheh 2
  • Asghar Asgharimoghadam 3
2 master faculty of science- Geology
3 Department of Geology, tabriz university
چکیده [English]

Due to the increasing need of human societies to groundwater, especially in arid and semi-arid regions such as Iran, Protection and prevention of pollution of these water resources are considered necessary. For this purpose, evaluating the vulnerability of groundwater can play a vital role in protecting and exploiting these resources. In the Barandozhay plain, due to the high agricultural activities, chemical fertilizers, pesticides application, and low depth of water table, there is the probability of aquifer contamination. For this purpose, at first, the potential of contamination of groundwater resources in the plain was studied using DRASTIC, SINTACS and SI models and then, the final map of vulnerable areas was prepared using the combination method. Comparison of the results obtained from the models with nitrate data based on the correlation index (CI) indicated that the combined method of the three models had more correlation than individual models of DRASTIC, SINTACS, and SI. Based on the combined method of the three models, 25, 40 and 35 percent of the Barandozchai plain aquifer area are located in the low, medium and high vulnerability range, respectively. Plain water is suitable for drinking according to the international standards of nitrates.

کلیدواژه‌ها [English]

  • Nitrate density
  • combined method
  • correlation index (CI)

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