بررسی اثرات تغییر اقلیم بر منابع آب حوضه زرینه رود با استفاده از مدل SWAT

نوع مقاله : مقالات پژوهشی

نویسندگان

• بهاره منصوری ¹
• حجت احمدزاده ²
• علیرضا مساح بوانی ¹
• سعید مرید ³
• مجید دلاور ⁴
• سعید لطفی ⁵

¹ دانشگاه تهران

² دانشگاه تبریز

³ تربیت مدرس

⁴ دانشگاه تربیت مدرس

⁵ دفتر برنامه ریزی کلان آب و آبفا وزارت نیرو

https://doi.org/10.22067/jsw.v0i0.35633

چکیده

تحقیق حاضر آثار ناشی از تغییر اقلیم را بر دما، بارندگی و رواناب در دوره های آتی با کمک مدل آماری LARS-WG و مدل مفهومی هیدرولوژیکی SWAT مورد ارزیابی قرار می دهد. برای مطالعه موردی، حوضه زرینه رود، بزرگترین زیرحوضه دریاچه ارومیه، انتخاب شد. در گام اول، به منظور تولید داده‌های هواشناسی دوره آتی در حوضه مدل LARS-WG مورد واسنجی قرار گرفت و سپس از 14 مدل از مدل های AOGCM استفاده گردیده و خروجی این مدل ها برای دوره 2030-2015 در 6 ایستگاه سینوپتیک با استفاده از مدل LARS-WG کوچک مقیاس شدند. از مدل SWAT جهت ارزیابی تأثیرات تغییر اقلیم بر میزان رواناب حوضه استفاده گردید. بدین منظور ابتدا این مدل با استفاده از 6 ایستگاه هیدرومتری برای دوره 2007-1987 واسنجی و اعتبارسنجی شد که مقادیر ضریب تعیین (R2 ) به ترتیب بین 49/0 تا 71/0 و 54/0 تا 77/0 بدست آمد. در ادامه با معرفی میانگین نتایج ریزمقیاس شده مدل های AOGCM به مدل SWAT تغییرات رواناب خروجی از حوضه در طی دوره 2030-2015 شبیه سازی گردید. میانگین نتایج مدل LARS-WG نشان داد که متوسط ماهانه درجه حرارت حداقل و حداکثر در دوره 2030-2015 افزایش خواهد یافت. همچنین متوسط ماهانه بارندگی در فصل بهار کاهش یافته در حالی که به مقدار آن در فصل های تابستان و پاییز افزوده خواهد شد. نتایج نشان داد که در دوره‌ آتی نه تنها در مقدار بارش بلکه در الگوی بارش نیز تغییراتی رخ خواهد داد. نهایتا نتایج نشان از کاهش 28 درصدی رواناب ورودی به سد زرینه رود در دوره‌ی آتی نسبت به دوره‌ی پایه دارد.

کلیدواژه‌ها

• تغییر اقلیم
• حوضه زرینه رود
• LARS-WG
• AOGCM
• رواناب
• SWAT

20.1001.1.20084757.1394.28.6.11.1

عنوان مقاله [English]

Assessment of Climate Change Impacts on Water Resources in Zarrinehrud Basin Using SWAT Model

نویسندگان [English]

• B. Mansouri ¹
• H. Ahmadzadeh ²
• A. Massah Bavani ¹
• saeed morid ³
• M. Delavar ⁴
• S. Lotfi ⁵

¹ University of Tehran

² University of Tabriz

³ Tarbiat Modares

⁴ Tarbiat Modares University

⁵ Water Management Office, Ministry of Energy

چکیده [English]

This paper evaluate impacts of climate change on temperature, rainfall and runoff in the future Using statistical model, LARS-WG, and conceptual hydrological model, SWAT. In order to the Zarrinehrud river basin, as the biggest catchment of the Lake Urmia basin was selected as a case study. At first, for the generation of future weather data in the basin, LARS-WG model was calibrated using meteorological data and then 14 models of AOGCM were applied and results of these models were downscaled using LARS-WG model in 6 synoptic stations for period of 2015 to 2030. SWAT model was used for evaluation of climate change impacts on runoff in the basin. In order to, the model was calibrated and validated using 6 gauging stations for period of 1987-2007 and the value of R2 was between 0.49 and 0.71 for calibration and between 0.54 and 0.77 for validation. Then by introducing average of downscaled results of AOGCM models to the SWAT, runoff changes of the basin were simulated during 2015-2030. Average of results of LARS-WG model indicated that the monthly mean of minimum and maximum temperatures will increase compared to the baseline period. Also monthly average of precipitation will decrease in spring season but will increase in summer and autumn. The results showed that in addition to the amount of precipitation, its pattern will change in the future period, too. The results of runoff simulation showed that the amount of inflow to the Zarrinehrud reservoir will reduce 28.4 percent compared to the baseline period.

کلیدواژه‌ها [English]

• Climate change
• Zarrinehrud Basin
• LARS-WG
• AOGCM
• runoff
• SWAT

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