پیش ‏بینی بارش در حوضۀ آبریز کرخه با استفاده از مدل LARS-WG

نوع مقاله : پژوهشی

نویسندگان

1 استادیار گروه انرژی‏ های نو و محیط زیست، دانشکدۀ علوم و فنون نوین، دانشگاه تهران

2 دانشجوی کارشناسی ‏ارشد مهندسی اکوهیدرولوژی، دانشکدۀ علوم و فنون نوین، دانشگاه تهران

چکیده

یکی از مسائل مهم در مدیریت و برنامه‏ریزی منابع آب کشور، پیش‏بینی تغییرات بارش در دوره‏های آینده است. هدف از تحقیق حاضر، بررسی روند تغییرات بارش 19 سال آینده حوضة آبریز کرخه با استفاده از 6 ایستگاه سینوپتیک (اسلام‏آباد غرب، بستان، خرم‏آباد، روانسر، کنگاور و ملایر) است. ابتدا داده‏های اقلیمی دورة پایه از سال 1998 تا سال 2016 به صورت روزانه فراهم شد. سپس، داده‏های خروجی مدل گردش عمومی جو IPCM4 با سه سناریوی تغییر اقلیم A1B، A2 و B1 توسط مدل LARS-WG در حوضة آبریز کرخه ریزمقیاس شد. نتایج به‌دست‌آمده از تغییرات بارش، در 6 ایستگاه سینوپتیک حوضة آبریز کرخه در دورة پایه (2016-1998) و دورة آینده (2017ـ 2035) ‌ارزیابی و تجزیه‌وتحلیل شد. نتایج به‌دست‌آمده‌ از بررسی میانگین بارش نشان می‏دهد در ایستگاه‏های اسلام‏آباد غرب، بستان، روانسر و ملایر میزان بارندگی 19 سال دورة آینده نسبت به 19 سال دورة گذشته بر اساس هر سه سناریوی A1B و A2 و B1 افزایش پیدا می‏کند و سناریوی اقلیمی A2 افزایش بیشتری را نسبت به دیگر سناریوها نشان می‏دهد. همچنین، میزان بارندگی دورة آینده نسبت به دورة گذشته در ایستگاه کنگاور، طبق هر سه سناریوی A1B و A2 و B1 کاهش خواهد یافت. در ایستگاه خرم‏آباد فقط طبق سناریوی A2 افزایش بارندگی در دورۀ آینده نسبت به دورۀ گذشته خواهد بود و طبق سناریوهای A1B و B1 میزان بارندگی دورة آتی روند کاهشی خواهد داشت.

کلیدواژه‌ها


عنوان مقاله [English]

Forecasting of Precipitation in Karkheh Catchment Area through LARS-WG Model

نویسندگان [English]

  • Mohammad Hossein Jahangir 1
  • Arad Asadi 2
  • Eghbal Noroozi 2
  • Maryam Talei 2
1 Assistant Professor, Facuty of New Sciences & Technologies, University of Tehran, Iran
2 M.Sc. Student of Ecohydrolog Engineering, Facuty of New Sciences & Technologies, University of Tehran, Iran
چکیده [English]

Forecasting of precipitation changes in the next periods is one of the most important issues in water resources management and planning. The present paper aims to investigate the trend of precipitation changes of Karkheh Catchment Area in 19 following years through 6 synoptic stations (Eslam Abad Gharb, Bostan, Khorram Abad, Ravansar, Kangavar, and Malayer). Firstly, climate data of the basic period was provided daily from 1998 to 2016. Then, output data of IPCM4 Atmospheric General Circulation Model became microscale through A1B, A2, and B1 scenarios of climate change through LARS-WG Model in Karkheh Catchment Area. Results obtained from precipitation changes were evaluated and analyzed in 6 synoptic stations of Karkheh Catchment Area in the basic period (1998-2016) and the next period (2017-2035). Results of investigating precipitation average represent that the precipitation during the next 19 years will increase compared to 19 previous years based on all A1B, A2 and B1 scenarios in stations of Eslam Abad Gharb, Bostan, Ravansar, and Malayer, and A2 Scenario shows more increase rather than the others. Moreover, according to all three scenarios, precipitation during the next period will decrease compared to the previous period in Kangavar Station. According to A2 Scenario, there will be more precipitation in the next period compared to the previous period in Khorram Abad Station and the precipitation during the next period will decrease according to A1B and B1 Scenarios.

کلیدواژه‌ها [English]

  • Climate Change
  • IPCM4 Model
  • Scenario
  • Greenhouse Gases
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