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ارزیابی آلودگی نیترات آب زیرزمینی بر اساس روش مؤلفه های اصلی و تحلیل عاملی (مطالعۀ موردی: آبخوان دشت کرج) | ||
| اکوهیدرولوژی | ||
| مقاله 6، دوره 5، شماره 4، دی 1397، صفحه 1119-1133 اصل مقاله (1.02 M) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ije.2018.256758.870 | ||
| نویسندگان | ||
| منوچهر چیت سازان* 1؛ مهدی ایل‌بیگی2؛ محمود محمدرضا پورطبری3 | ||
| 1استاد، دانشکدۀ علوم زمین، دانشگاه شهید چمران اهواز | ||
| 2دانشجوی دکتری، دانشکدۀ علوم زمین، دانشگاه شهید چمران اهواز | ||
| 3دانشیار، دانشکدۀ فنی و مهندسی، دانشگاه شهرکرد | ||
| چکیده | ||
| نیترات از مهمترین آلایندههایی است که بیشتر آبخوانها، ازجمله آبخوان کرج، از آن آسیب میبینند. از آنجا که روش معمول برای بررسی فرایندهای هیدروژئوشیمیایی در آبخوان، بهصورت گرافیکی است، بهمنظور ارزیابی آلودگی نیترات در دادههای کیفی 86 چاه در آبخوان کرج طی سال 2013، از روشهای چندمتغیرۀ آماری بهعنوان یک روش تکمیلی برای درک عوامل مؤثر بر کیفیت آبهای زیرزمینی، شناسایی آلودگی و طبقهبندی نمونههای مشابه استفاده شد. به این منظور، از نرمافزار XLSTAT برای مطالعۀ آلودگی نیترات و ارتباط آن با سایر پارامترهای شیمیایی آب و عوامل مؤثر بر آن بهره گرفته شد. تجزیه و تحلیل آماری نشان میدهد خوشهبندی سلسله‌مراتبی به استخراج سه خوشه منجر شده است. نمونههای دوم و سوم خوشه غلظت بیشتری از نیترات نسبت به گروه نخست دارد. نتایج به‌دست‌آمده از تحلیل عوامل اصلی (PCA) همچنین نشان میدهد پارامتر نیترات بیشترین همبستگی با کلر و کمترین همبستگی با سدیم و سولفات را دارد. از سوی دیگر، بر اساس چرخش واریماکس، عوامل اصلی کیفیت آبخوان به دو عامل خلاصه شدند. عامل ژئوژنیک (زمین‌زاد)، نخستین عاملی است که به علت اثر مواد تشکیلدهندۀ آبخوان به وجود می‌آید و دومین عامل، یک عامل انسانزاد است که به علت فعالیتهای انسانی، بهخصوص فاضلاب تشکیل می‌شود. | ||
| کلیدواژه‌ها | ||
| آب زیرزمینی؛ تحلیل عاملی؛ خوشهبندی؛ نیترات | ||
| عنوان مقاله [English] | ||
| Evaluation of Groundwater Nitrate Pollution Based on Main Components and Factor Analysis (Case Study: Karaj Plain Aquifer) | ||
| نویسندگان [English] | ||
| Manuchehr Chitsazan1؛ Mehdi Eilbeigy2؛ Mahmood Mohammad Rezapour Tabari3 | ||
| 1Professor, Faculty of Earth Sience, University of Shahid Chamran, Ahwaz, Iran | ||
| 2Ph.D. Candidate, Faculty of Earth Science, University of Shahid Chamran, Ahwaz, Iran | ||
| 3Associate Professor, Faculty of Engineering, University of Shahrkord, Shahrkord, Iran | ||
| چکیده [English] | ||
| Nitrate is one of the most significant pollutants that most aquifers, including the Karaj aquifer, have suffered from it. Because the conventional method to investigate the hydrogeochemical processes in the aquifer is graphical ones, in order to evaluate the pollution of nitrate in the qualitative data of 86 wells in Karaj aquifer in 2013, the multivariate statistical methods has been carried out as a complementary method for understanding the factors affecting groundwater quality, pollution identification and classification of similar samples. In this regard, XLSTAT software is used to study the pollution of nitrate and its relationship to other chemical parameters of water, and the factors influencing it. The statistical analysis indicates that hierarchal clustering has led to the extraction of three clusters. The second and the third cluster samples have a higher concentration of nitrate than the first one. The results, based on the principal components analysis (PCA), also show that the nitrate parameter has the highest correlation with chlorine and the least adaptation with sodium and sulfate. On the other hand, based on the varimax rotation, the main components were summed up to two components. The first one is a geogenic factor, which is due to the effect of the material that forms aquifer and second is an anthropogenic factor that is due to human actions, especially sewage. | ||
| کلیدواژه‌ها [English] | ||
| Groundwater, Nitrate, factor analysis, Clustering | ||
| مراجع | ||
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