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ارزیابی آسیب‌پذیری آبخوان آبرفتی ملکان با استفاده از مدل DRASTIC و اعتبارسنجی آن به کمک منحنی مشخصه عملکرد گیرنده

نوع مقاله : مقاله پژوهشی

نویسندگان

مهدی اسدی 1
تقی مهدوی 2

1 استادیار، گروه عمران، دانشکده فنی و مهندسی، دانشگاه آزاد اسلامی واحد گناباد، گناباد، ایران.

2 استادیار، گروه عمران، دانشکده فنی و مهندسی، دانشگاه آزاد اسلامی واحد مراغه، مراغه، ایران.

https://doi.org/10.22077/jaaq.2026.10880.1138
چکیده
راه‌های زیادی برای استخراج مناطقی از آب‌های زیرزمینی مستعد آلوده شدن وجود دارد تجزیه‌وتحلیل‌های دقیق محلی پرهزینه هستند، اما کاربرد مدل DRASTIC نسبت به روش‌های کمی و کیفی دیگر کم‌هزینه‌تر است. این مطالعه بر ارزیابی مناطق آسیب‌پذیر آب زیرزمینی در دشت آبرفتی ملکان در شرق دریاچه ارومیه متمرکز است که به جهت وجود جمعیت متمرکز و اراضی مستعد کشاورزی در کنار شهرک‌های صنعتی در حال رونق، به‌شدت در برابر آلودگی آسیب‌پذیر است. این مطالعه برای بررسی آسیب‌پذیری آب‌های زیرزمینی دشت ملکان توسط مدل DRASTIC به‌طور ابتکاری ابزارهای GIS را به همراه تکنیک‌های اعتبارسنجی با غلظت نیترات بکار گرفته است. با استفاده از تحلیل ROC، مدل دقت بالایی را نشان می‌دهد (AUC=0.8) و بینش‌های عملی را برای مدیریت پایدار آب ارائه می‌کند. نقشه آسیب‌پذیر نهایی نشان می‌دهدبه میزان 27 درصد از آبخوان دارای درجه آسیب‌پذیری کم و بقیه قسمت‌های آبخوان (73 درصد) که درجه آسیب‌پذیری متوسط دارد، غالباً نرخ نفوذ بالا، خاک درشت‌بافت، عمق آب زیرزمینی کم و تراز آب زیرزمینی نزدیک به سطح زمین دارد. این تحقیق با شناسایی مناطقی که امکان نفوذ و پخش آلاینده‌ها از سطح زمین به آب‌های زیرزمینی در آن‌ها وجود دارد، کمک می‌کند تا از آلودگی منابع آب زیرزمینی جلوگیری شده و اقدامات پیشگیرانه و ترمیمی به موقع انجام گیرد.

کلیدواژه‌ها

آب زیرزمینی
غلظت نیترات
مدل DRASTIC
منحنی مشخصه عملکرد گیرنده
موضوعات

عنوان مقاله English

Vulnerability assessment of Malekan alluvial aquifer by using DRASTIC model and its validation by using receiver operating characteristic curve

نویسندگان English

Mehdi Asadi 1
Taghi Mahdavi 2
1 Assistant Professor, Department of Civil Engineering, Faculty of Technology and Engineering, Gonabad Branch of Islamic Azad University, Gonabad, Iran
2 Assistant Professor, Department of Civil Engineering, Faculty of Technology and Engineering, Maragheh Branch of Islamic Azad University, Maragheh, Iran.
چکیده English

There are many ways to extract groundwater areas susceptible to contamination. Accurate local analyses are costly, but the application of the DRASTIC model is less costly than other quantitative and qualitative methods. This study focuses on assessing groundwater vulnerable areas in the Malekan alluvial plain in the east of Lake Urmia, which is highly vulnerable to contamination due to the presence of a concentrated population and agriculturally suitable lands alongside booming industrial settlements. This study innovatively uses GIS tools along with validation techniques with nitrate concentration to investigate the groundwater vulnerability of the Malekan plain using the DRASTIC model. The final vulnerability map shows that 27 percent of the aquifer has a low vulnerability level and the remaining parts of the aquifer (73 percent) have a moderate vulnerability level, often with high infiltration rates, coarse-textured soil, shallow groundwater depth, and groundwater levels close to the ground surface. By identifying areas where contaminants can penetrate and spread from the surface to groundwater, this research helps to prevent contamination of groundwater resources and take timely preventive and remedial measures.

کلیدواژه‌ها English

Groundwater
Nitrate Concentration
DRASTIC Model
Receiver Operating Characteristic Curve
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دوره 7، شماره 1
شهریور 1405
صفحه 41-64

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