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مدیریت پایدار منابع آب با استفاده از ارائۀ طرح بازچرخانی رواناب شهری با هدف آبیاری فضای سبز (مطالعۀ موردی کانال الهیه منطقۀ 3 تهران) | ||
| اکوهیدرولوژی | ||
| دوره 9، شماره 4، دی 1401، صفحه 771-782 اصل مقاله (1.14 M) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ije.2023.352783.1705 | ||
| نویسندگان | ||
| سمیه سادات تارا1؛ سیده مهسا موسوی رینه2؛ حسین یوسفی* 3 | ||
| 1رئیس ادارۀ محیط زیست و توسعۀ پایدار شهرداری منطقۀ 3 تهران | ||
| 2دانشجوی دکتری مهندسی منابع آب، گروه مهندسی آب، پردیس ابوریحان، دانشگاه تهران | ||
| 3دانشیار دانشکدۀ علوم و فنون نوین، دانشگاه تهران | ||
| چکیده | ||
| تخریب اکوسیستمهای آبی، افت کیفیت آب شهری و کمبود آب موجب شد تا کشورها به استفاده از منابع آبی نامتعارف روی آوردند. در حال حاضر، منابع آب شهرهای پرجمعیت مانند تهران بر اثر مصرف و برداشت بیش از حد با کاهش شدید مواجه شده است. در این تحقیق، کانال آب الهیه منطقۀ 3 تهران به عنوان مطالعۀ موردی برای بررسی طرح بازچرخانی و استفادۀ مجدد از آب کانال انتخاب شد. تحقیق حاضر به بررسی فرایند برداشت، تصفیه و سپس استفادۀ مجدد آب کانال شهری با هدف آبیاری بخشی از فضای سبز منطقۀ 3 تهران پرداخته است. دادههای مورد استفاده در این تحقیق به روش مشاهدۀ میدانی برداشت شده و تجزیهوتحلیلها در یکی از آزمایشگاههای معتمد محیط زیست انجام شده است. برخی از مهم‌ترین نتایج کیفیت آب به صورت زیر است: بیشترین احتمال آماری کلیفرم گوارشی 1100 در 100 میلیلیتر بوده، این مقدار نشان‌دهندۀ آلودگی میکروبی است. وجود نمکهای سدیمی موجب کاهش نفوذپذیری آب در خاک میشود و عامل بازداندۀ رشد گیاهان است، میانگین میزان سدیم آب این کانال، 34 میلیگرم بر لیتر بوده که از حد آستانه تجاوز کرده است. میانگین مقدار BOD5 و COD به‌ترتیب 38 و 72 میلیگرم بر لیتر بوده است که از نظر استاندارد EPA این مقادیر بیشتر از حد مجاز است. همچنین، نتایج آزمایش فلزات سنگین نشان داد بور با میانگین 52 ppb از حد آستانه تجاوز کرده است و محدودیت شدید در آبیاری ایجاد میکند. در نهایت، نتایج آزمایش نمونههای آب کانال، نشان داد با انجام مراحل مختلف تصفیه از جمله تصفیۀ فیزیکی، پیشرفته و گندزدایی، این آب جهت استفادۀ مجدد آمادهسازی میشود. همچنین، نتایج این مطالعه نشان داد استفاده از آب کانال الهیه برای آبیاری فضای سبز موجب کاهش فشار بر سفرۀ آب زیرزمینی میشود، چرا که در حال حاضر 560 مترمکعب در روز از چاه فخار برداشت میشود که در صورت جایگزین کردن آب کانال الهیه این مقدار در سفرۀ آب زیرزمینی به صورت ذخیره باقی خواهد ماند. | ||
| کلیدواژه‌ها | ||
| بازچرخانی آب؛ استفادۀ مجدد؛ پساب؛ آب نامتعارف؛ مدیریت پایدار آب؛ تأمین آب آبیاری | ||
| عنوان مقاله [English] | ||
| Sustainable management of water resources by reusing urban runoff for irrigation (case study of Elahieh Canal, district 3, Municipality of Tehran) | ||
| نویسندگان [English] | ||
| Somayeh Sadat Tara1؛ Seyedeh Mahsa Mousavi Reineh2؛ Hossein Yousefi3 | ||
| 11Head of Environment and Sustainable Development Department, District 3, Municipality of Tehran, Iran | ||
| 2PhD student of Water Engineering, Department of Water Engineering, Aburaihan Campus, University of Tehran, Iran | ||
| 3Faculty of New Sciences and Technologies, University of Tehran, Iran | ||
| چکیده [English] | ||
| Destruction of aquatic ecosystems, reduction of urban water quality and shortage of water caused countries to use unconventional water sources. Currently, the water resources of populated cities like Tehran are under severe pressure. In this research, the Elahieh canal in Tehran 3rd district was selected as a case study. The purpose of this study is to reuse canal water as an important method of sustainable management of water resources. The present research has investigated the supplying, purification and reuse of urban canal water with the aim of irrigating a part of the green areas in the 3rd district of Tehran. The data that is used in this research was collected by field observation method and the analyzes were done in the accredited laboratory. Some of the most important water quality results are as follows: the average amount of coliform bacteria was 1100 MPN/100cc, this value indicates microbial contamination. The presence of sodium reduces the permeability of water in the soil and inhibits the growth of plants. The amount of sodium in the water of this channel is 34 mg/lit, which has exceeded the threshold. The amount of BOD5 and COD was 38 and 72 mg/lit, respectively. Also, the heavy metal test results showed that boron exceeded the threshold with an average of 52 ppb. Finally, the testing of the samples showed that this water will be prepared for reuse by performing various stages of physical and advanced purification and also disinfection. Also, the results showed that using the Elahieh canal water for irrigation, reduces the pressure on the underground water table. Currently, 560 cubic meters per day are being pumped from the Fakhar well, if recycled water is used instead of Fakhar well, 560 cubic meters per day will be saved. | ||
| کلیدواژه‌ها [English] | ||
| Water Recycling, Reuse, Effluent, Unconventional Water, Sustainable Water Management, Irrigation Water Supply | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 170 تعداد دریافت فایل اصل مقاله: 159 |
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