بررسی اثر تغییر اقلیم بر جریان ورودی به آبگیر سد درودزن در استان فارس طی دوره‌های آتی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری مهندسی منابع آب، دانشکده ی علوم آب –دانشگاه شهید چمران اهواز

2 استاد گروه هیدرولوژی و مهندسی منابع آب، دانشکده ی علوم آب - دانشگاه شهید چمران اهواز

3 دانشیار گروه مهندسی عمران، دانشکده ی مهندسی دانشگاه شهید چمران اهواز

4 استادیار گروه هیدرولوژی و مهندسی منابع آب، دانشکده ی علوم آب- دانشگاه شهید چمران اهواز

چکیده

ارزیابی دگرگونی و آسیب‌پذیری ناشی از تغییر‌اقلیم جهت برنامه­ریزی آینده منابع آب ضروری می­باشد. در این تحقیق، شبیه­سازی­های اقلیمی با کاربرد 4 شبیه­ساز گردش عمومی(GCM) ارائه شده در گزارش چهارم ارزیابی تحت دو نمایشنامه­ی انتشار  A2و B1 انجام شده است. نتایج نشان دادند که میانگین تغییرات دما بین 13/0- تا 96/0 و 72/0 تا 85/1 درجه­ی سانتیگراد به ترتیب برای دوره­های 2038-2016 و 2061-2039  می­باشد. علاوه بر این، میانگین تغییرات بارندگی ماهانه­ی شبیه­سازی شده دوره­های مذکور نسبت به دوره­ی مشاهداتی(2010-1988) به ترتیب بین 5/3- تا 182 و 7/20- تا 123درصد است. همچنین، شبیه­سازی بارش- رواناب روزانه با کاربرد شبیه­ساز IHACRESS انجام شد، چنان که میزان R2 برای واسنجی و صحت­سنجی در بهینه­ترین حالت به ترتیب برابر با 684/0 و 635/0 به دست آمده است. به طورکلی، میانگین حجم رواناب سالانه ورودی به آبگیر سد درودزن طی دوره‌های آتی نسبت به دوره­ی پایه به ترتیب به میزان 4/8 و 15/28 درصد کاهش خواهد یافت. علاوه بر این، بیشترین کاهش در میانگین حجم رواناب ماهانه­ی حوضه طی دوره­های آتی به ترتیب برابر با 34/42 و 13/54 درصد در نوامبر نسبت به دوره­ی پایه پیش‌بینی شده است.

کلیدواژه‌ها


عنوان مقاله [English]

Climate Change Impact on the Future Inflow of the Doroodzan Reservoir in the Province of Fars

نویسندگان [English]

  • Farshid Safshekan 1
  • Ali Mohammad Akhoond-Ali 2
  • Ali Haghighi 3
  • Heidar Zarei 4
چکیده [English]

The Fourth Assessment Report of the Intergovernmental Panel on Climate Change presents four general circulation models under the SRES emission scenarios of A2 and B1. The take-home message of these documents is the expected change in the atmospheric temperature, which undoubtedly would affect the hydrology of watersheds. These warnings dictate the necessity of prediction of the future change in the flow of rivers and the vulnerability of the people who depend on them for their water supplies. Results indicated that the average temperature variations are from -0.13 to 0.96°C  and 0.72 to 1.85°C for 2016-2038 and 2039-2061 periods, respectively. Furthermore, the average monthly rainfall variations in the baseline period in comparison to the observed period (1988-2010) are from -3.5 to 182% and -20.7 to 123 % for those two periods, respectively. The daily rainfall- runoff simulation using the IHACRES model yielded the R2 of 0.684 and 0.635 for the calibration and validation stages, respectively. Overall, the mean volume of annual runoff into the Doroodzan Reservoir would decrease by 8.4 and 28.15 % as compared with the baseline period for the 2016-2038 and 2039-2061, respectively. Furthermore, the most decrease in the mean volume of monthly runoff of the basin in comparison with the baseline period has been predicted for November to be 42.34 and 54.13 % for those two periods, respectively.

کلیدواژه‌ها [English]

  • Climate Change
  • Inflow of the basin
  • Doroodzan Dam Basin
  • Downscaling
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