تغییرات آب‏وهوایی و بهره‏برداری از رویکرد WEF Nexus شهری برای بهره‏گیری از منابع موجود در شهر بروجرد

نوع مقاله: پژوهشی

نویسندگان

1 استادیار، دانشکده عمران، دانشگاه یزد، یزد

2 دانشجوی کارشناسی ارشد مهندسی آب و سازه‌های هیدرولیکی، دانشکده فنی و مهندسی، دانشگاه آیت‌اله العظمی بروجردی (ره)، بروجرد

3 استادیار، دانشکده فنی و مهندسی، دانشگاه آیت اله العظمی بروجردی(ره)، بروجرد

چکیده

با توجه به متغیرهای هیدرولوژیکی از جمله بارش و دما که تحت تأثیر تغییرات اقلیمی بوده و در شبیه‏سازی فرایند آب، غذا و انرژی مؤثر‌ند، بررسی تغییرات یادشده و بهره‏برداری از رویکرد WEF Nexus شهری برای بهره‏گیری از منابع موجود، ضروری است. با در نظر گرفتن محدودیت منابع آب و ارزش آن در کشاورزی، به‏کارگیری راه‌کارهای نوآورانه برای صرفه‏جویی در مصرف و استفادۀ بهینه از آب موجود، امری مهم است. در حال حاضر، معتبرترین ابزار تولید سناریوهای اقلیمی، مدل‏های سه‌بعدی جفت‌شدۀ گردش عمومی جو- اقیانوس هستند. در پژوهش حاضر سعی شده است از منابع آب موجود برای توسعۀ پایدار شهری با توجه به تغییرات اقلیمی استفاده شود. برای انجام پژوهش حاضر از خروجی مدل HADGEM2 تحت دو سناریوی انتشار RCP2.6 و RCP8.5 مربوط به پنجمین گزارش ارزیابی هیئت بین‏الدول تغییر اقلیم بهره گرفته و رویکرد WEF Nexus شهری برای منطقۀ مطالعاتی شهر بروجرد استفاده شد. نتایج نشان داد در دورۀ آتی دما بین 5/1 تا 3 درجۀ سانتی‏گراد افزایش خواهد داشت. همچنین، بارش در سناریوی RCP2.6 تا 20 میلی‏متر افزایش و در سناریوی RCP8.5 تا 40 میلی‏متر کاهش خواهد داشت. نتایج WEF Nexus نشان داد کشاورزی متمرکز شهری به‌ترتیب 29/21 و 272 درصد تقاضای محلی میوه و سبزیجات را برآورده کرده و برداشت آب باران، 6/3 درصد تقاضای منابع آب شیرین را تأمین می‏کند. همچنین، چرخۀ فاضلاب شهری و مصرف دوباره، تقاضای آب برای آبیاری کشاورزی شهری را تأمین می‏کند. تولید الکتریسیته و بیوگاز از پسماند‏های شهری می‏تواند روزانه 08/1 درصد فعلی الکتریسیته را تأمین کند که هزینۀ مدیریت فاضلاب ممکن است از نوسازی و عملیات جدید فاضلاب شهری کمتر باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Climatic Changes and the application of an Urban WEF Nexus Approach to the Utilization of the Existing Recources in Boroujerd

نویسندگان [English]

  • Mohammadreza Goodarzi 1
  • Reza Piryaei 2
  • mir rahim mousavi 3
1 Assistant Professor, Civil Engineering faculty, Yazd University, Yazd, Iran.
2 M.S. Student in Hydraulic Straucture and Water Engineering, Engineering Faculty,Ayatollah Boroujerdi University, Boroujerd, Iran.
3 Assistant Professor, Faculty of Engineering, Ayatollah Boroujerdi University, Boroujerd, Iran.
چکیده [English]

Since such hydrological factors as precipitation and temperature, affected by climate change, are influential in simulating WEF processes, it is necessary to explore the problem. Currently the most reliable instrument for generating the climatic scenarios of the paired 3D models for the general flow of atmosphere and ocean. This study aims to use the existing water resources for urban sustainable development with a view to climate change. Based on two different scenarios of RCP2.6 and RCP8.5 for the 5th Evaluation Report by on Intergovernmental committee on climate changes, the output of HADGEM2 model was used and the city of Boroujerd, Iran, was chosen as the pilot location where the WEF Nexus approach has been adopted. The findings indicate that there will be a 1.5-3C˚ increase in temperature in the next period. Furthermore, in RCP2.6 scenario, it will experience as much as 20mm increase in precipitation and in RCP8.5 it will decrease by 40mm. The results from WEF model suggest that a centralized agricultural system accounts for 21.29% of the local demand for fruits and 272% of the local demand for vegetables while rainwater harvesting is responsible for 3.6% of the demand for fresh water resources. The water demand for urban irrigation purposes is supplied with urban sewage cycle and reconsumption. Biogas production and power generation from urban waste can daily supply 1.08% of the current electricity. This means that the cost of sewage management might be lower than that of renovation and new operation in urban sewage.

کلیدواژه‌ها [English]

  • climate change
  • Urban Agriculture
  • The city of Boroujerd
  • Model HADGM2
  • WEF Nexus
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