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ارزیابی آسیبپذیری ذاتی آبخوان دشت میاندوآب نسبت به آلودگی بر مبنای مدلهای AVI، GODS،DRASTIC و DRASTIC واسنجی‌شده | ||
| اکوهیدرولوژی | ||
| مقاله 13، دوره 6، شماره 2، تیر 1398، صفحه 447-463 اصل مقاله (721.59 K) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ije.2019.271783.1008 | ||
| نویسندگان | ||
| اسفندیار عباس نوین پور* 1؛ مریم خضری2 | ||
| 1استادیار گروه زمین شناسی، دانشگاه ارومیه | ||
| 2دانشجوی کارشناسی ارشد هیدروژئولوژی، گروه زمین شناسی، دانشگاه ارومیه | ||
| چکیده | ||
| دشت میاندوآب جزء حوضۀ آبخیز دریاچۀ ارومیه است که در سالیان اخیر به‌گونه‌ای چشمگیر از کمیت و کیفیت منابع آبی آن کاسته شده است. تعیین آسیبپذیری آب زیرزمینی ابزاری مفید برای سنجش حساسیت آبخوان نسبت به آلودگی را فراهم میآورد. هدف از پژوهش حاضر، تعیین آسیبپذیری آبخوان با استفاده از مدلهای AVI، GODS وDRASTIC و همچنین مدل DRASTIC واسنجی‌شده است که سبب می‌شود پتانسیل آسیبپذیری نسبت به آلودگی با دقت بیشتری قابل تعیین باشد. در تحقیق حاضر به منظور فراهم‌آوردن لایههای اطلاعاتی مورد نیاز برای تهیۀ هر یک از مدلهای آسیبپذیری در محیط نرمافزار ArcGIS، داده و اطلاعات ارائه‌شده توسط سازمان آب منطقهای آذربایجان شرقی استفاده شد. مقادیر جدید مدل DRASTIC واسنجی‌شده با استفاده از همبستگی بین هر پارامتر و غلظت نیترات به‌دست‌آمده از آنالیز 16 نمونۀ آب برداشتشده در مردادماه 1395 انجام شد. همچنین، صحتسنجی نقشههای نهایی آسیبپذیری با مقادیر نیترات نیز صورت گرفت. مقدار ضرایب تعیین‌شده بین غلظت نیترات و مدلهای آسیبپذیری AVI،GODS، DRASTIC و DRASTIC واسنجی‌شده بهترتیب 004/0، 13/0، 18/0 و 33/0 برآورد شد. نتایج نشان داد مدل دراستیک بعد از واسنجی با دادههای نیترات بهترین مدل برای ارزیابی آسیبپذیری آبخوان دشت میاندوآب نسبت به آلودگی است. بر این اساس، مشاهده شد که بیشترین آسیبپذیری آب زیرزمینی نسبت به آلودگی در قسمتهای شمال شرقی و بخشهایی از غرب دشت و کمترین آسیبپذیری در قسمتهای جنوبی و جنوب شرقی دشت وجود دارد. | ||
| کلیدواژه‌ها | ||
| دشت میاندوآب؛ مدل GODS؛ مدل AVI؛ مدل DRASTIC واسنجی‌شده؛ نیترات | ||
| عنوان مقاله [English] | ||
| Assessment of the intrinsic vulnerability of aquifer to pollution in Miandoab Plain based on the AVI, GODS, DRASTIC and modified DRASTIC models | ||
| نویسندگان [English] | ||
| Esfandiar Abbas Novinpour1؛ Maryam Khezri2 | ||
| 2M.Sc Hydrogeology, Department of Geology , Urmia University, Urmia | ||
| چکیده [English] | ||
| Miandoab Plain is part of the Urmia Lake basin, which has significantly reduced the quantity and quality of its water resources in recent years. Groundwater vulnerability assessments provide a useful method for analyzing the sensitivity of aquifer to the contaminant. The purpose of this study was determining the vulnerability of the aquifer using AVI, GODS, DRASTIC and modified DRASTIC models so that the vulnerability potential to pollution can be determined more exactly. In this study, the data and information provided by the Regional Water Company of East Azarbaijan were used to provide layers needed for the preparation of each vulnerability model in the ArcGIS software. The new rates of modified DRASTIC model calculated using a correlation between each parameter and the nitrate concentration obtained from the analysis of 16 water samples taken in July 2016. The final mapping of the vulnerability maps was also verified by nitrate values. Also, validation of the final vulnerability maps was done with nitrate values. The coefficients of determined values between the nitrate concentration and vulnerability models of AVI, GODS, DRASTIC and modified DRASTIC were estimated to be 0.004, 0.13, 0.18, and 0.33, respectively. The results showed that after calibrating the model with the nitrate data, it is the best model for assessing the vulnerability of Aquifer. Based on this, it was observed that the most vulnerable groundwater pollution is in the northeast and parts of the west of the plain and the least vulnerable in the southern and southeastern parts of the plain. | ||
| کلیدواژه‌ها [English] | ||
| AVI model, GODS model, Miandoab Plain, Modified DRASTIC model, Nitrate | ||
| مراجع | ||
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