توسعه روش DRASTIC با در نظر گرفتن کاربری اراضی به‌منظور تحلیل پتانسیل آلودگی آبخوان مناطق نیمه‌خشک

افتخاری, مبین; اکبری, محمد

doi:10.22034/jewe.2020.236463.1374

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ دانش‌آموخته کارشناسی‌ارشد، عضو باشگاه پژوهشگران جوان و نخبگان، واحد مشهد، دانشگاه آزاد اسلامی، مشهد، ایران

² استادیار، گروه مهندسی عمران، دانشکده مهندسی، دانشگاه بیرجند، بیرجند، ایران

https://doi.org/10.22034/jewe.2020.236463.1374

چکیده

ارزیابی آسیب‌پذیری آب‌های زیرزمینی با هدف اولویت‌بندی این منابع از منظر بهره‌برداری، مدیریت و کنترل میزان آلودگی‌های واردشده در مناطق مختلف دارای اهمیت می‌باشد. هدف از این پژوهش ارزیابی آسیب‌پذیری کیفی آبخوان دشت بیرجند با استفاده از مدل DRASTIC-LU بود. در این پژوهش مدل پایه DRASTIC با پارامتر کاربری اراضی توسعه‌یافته، استفاده‌شد. در این روش پارامترهای مدل پایه شامل عمق آب زیرزمینی، تغذیه خالص، محیط آبخوان، جنس خاک، توپوگرافی، مواد تشکیل‌دهنده منطقه سیرنشده و هدایت هیدرولیکی به همراه متغیر کاربری اراضی به‌عنوان توسعه مدل بر اساس وزنهای استاندارد، در محیط GIS تحلیل و نقشه پهنهبندی آسیبپذیری تهیه شد. نقشه پهنه‌بندی آسیب‌پذیری مدل DRASTIC-LU، نشان داد که 27/62، 07/25، 17/10 و 38/2% از مساحت منطقه به ترتیب دارای آسیب‌پذیری کم تا متوسط، متوسط تا زیاد، کم‌ و زیاد است. همچنین، تحلیل حساسیت مدل مورداستفاده جهت ارزیابی وزن‌های اختصاص‌یافته صورت گرفت. جهت صحت سنجی مدل، همبستگی مدل با غلظت نیترات انجام شد؛ همبستگی 86% به‌دست‌آمده، نشان‌دهنده همبستگی مناسب این مدل با غلظت نیترات به‌عنوان شاخص آلودگی آب‌های زیرزمینی است.

کلیدواژه‌ها

موضوعات

مدیریت منابع آب

عنوان مقاله [English]

Development of DRASTIC Method Considering Land Use to Analyze the Potential of Aquifer Pollution in Semi-Arid Regions

نویسندگان [English]

Mobin Eftekhari ¹
Mohammad Akbari ²

¹ M.Sc. Alumni, Department of Civil Engineering, and Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran

² Assist. Professor. Department of Civil Engineering, Faculty of Engineering, University of Birjand, Birjand, Iran

چکیده [English]

Groundwater vulnerability assessment is important in order to prioritize these resources from the perspective of exploitation, management and control of pollution in different areas. The purpose of this study was to evaluate the qualitative vulnerability of Birjand plain aquifer using DRASTIC-LU model. In this research, the DRASTIC base model with the land use parameter of the developed lands was used. In this method, the basic model parameters including groundwater depth, net nutrition, aquifer environment, soil type, topography, unsaturated area constituents, and hydraulic guidance were analyzed in GIS environment along with land use variable as a model development based on standard weights and the vulnerability zoning map was prepared. Vulnerability zoning map of DRASTIC-LU model showed that 62.27, 25.07, 17.17, and 2.38% of the area have low to medium, medium to high, low and high vulnerability, respectively. In addition, the sensitivity analysis of the model used to evaluate the assigned weights was performed. To validate the model, the correlation of the model with the nitrate concentration was performed; the obtained correlation of 86% indicated the appropriate correlation of this model with the nitrate concentration as an indicator of groundwater pollution.

کلیدواژه‌ها [English]

Birjand Plain
Groundwater
Semi-Arid Regions
Sensitivity Analysis
Vulnerability

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محیط زیست و مهندسی آب

توسعه روش DRASTIC با در نظر گرفتن کاربری اراضی به‌منظور تحلیل پتانسیل آلودگی آبخوان مناطق نیمه‌خشک

مراجع

مراجع

دوره 6، شماره 4
دی 1399
صفحه 345-359

توسعه روش DRASTIC با در نظر گرفتن کاربری اراضی به‌منظور تحلیل پتانسیل آلودگی آبخوان مناطق نیمه‌خشک

مراجع

مراجع

دوره 6، شماره 4دی 1399صفحه 345-359

دوره 6، شماره 4
دی 1399
صفحه 345-359