نشریه آبیاری و زهکشی ایران

نشریه آبیاری و زهکشی ایران

ارزیابی اثر تغییراقلیم برمتغیرهای حدی دما و بارش در حوضه آبریز تجن تحت سناریوهای SSP

نوع مقاله : مقاله پژوهشی

نویسندگان
1 گروه مهندسی آب، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری ایران.
2 گروه مهندسی آب، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران
3 گروه مهندسی آب، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران.
4 گروه مهندسی آبیاری و آبادانی، دانشکدگان کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران.
چکیده
انقلاب صنعتی در قرن نوزدهم و ازدیاد غلظت گازهای گلخانه‌ای سبب تغییر دمای منطقه‌ای و جهانی، الگوی بارندگی و دیگر شرایط اقلیمی شده‌است. در این پژوهش از گزارش ششم (AR6) و مدل SDSM برای ریزمقیاس‌سازی دما و بارش در دو دوره زمانی آینده نزدیک (2048–2025) و آینده دور (2088–2065) استفاده شده‌است. شاخص‌های آماری مورد استفاده کارایی خوب مدل در شبیه‌سازی دما را نشان دادند. همچنین برای بارش، به‌غیر از شاخص RMSE، سایر شاخص‌ها در محدوده مناسب‌ بوده‌اند. نتایج نشان داد که دمای بیشینه ایستگاه سلیمان‌تنگه بین 8/1 تا 4/0 و 8/1 تا 6/0 و ایستگاه قراخیل 8/1 تا 7/0 و 8/1 تا 6/0 درجه و دمای کمینه ایستگاه سلیمان‌تنگه به ترتیب 1/0 تا 1 و 1/0 تا 1/1 و ایستگاه قراخیل 1/0 تا 5/1 و 5/0 تا 6/1 درجه به‌ترتیب در آینده نزدیک و دور افزایش خواهند یافت. مدلSSP5-85 بیشترین بارندگی‌ها را برای ماه‌های سرد پیش‌بینی نموده‌است و این افزایش می‌تواند منجر به وقوع سیلاب‌ها و تغییرات شدید در الگوی بارندگی گردد که ضرورت اجرای برنامه‌های جامع مدیریت منابع آب و خاک، بازنگری و به‌روزرسانی طراحی سازه‌های مهندسی مرتبط با کنترل سیلاب و اتخاذ راهکارهای موثر برای مواجهه با مخاطرات اقلیمی را نشان می‌دهد.
کلیدواژه‌ها

عنوان مقاله English

Assessment of the Impact of Climate Change on Extreme Variables of Temperature and Precipitation in the Tajan Watershed under SSP Scenarios

نویسندگان English

Elnaz Aghaee Kahlik Bolaghi 1
Ramin Fazloula 2
Mohsen Masoudian 3
Mehdi Yasi 4
Mehdi Nadi 3
1 Water Engineering Department, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
2 Water Dept., Agricultural Eng. College, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
3 Water Engineering Department, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
4 Department of Irrigation and Reclamation Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran.
چکیده English

The Industrial Revolution of the 19th century, coupled with the increasing concentration of greenhouse gases, has significantly altered regional and global temperatures, precipitation regimes, and other climatic parameters. This study integrates projections from the Sixth Assessment Report (AR6) with the Statistical DownScaling Model (SDSM) to assess future temperature and precipitation patterns for two-time horizons: the near future (2025–2048) and the far future (2065–2088). Model evaluation using multiple statistical indices demonstrated high accuracy in simulating temperature, while precipitation simulations were satisfactory across all metrics except RMSE. Results indicate that the maximum temperature at Soleyman-Tangeh station will rise by 0.4–1.8°C and 0.6–1.8°C, and at Qarakheil station by 0.7–1.8°C and 0.6–1.8°C, in the near and far future, respectively. Minimum temperature at Soleyman-Tangeh is expected to increase uniformly by 0.1–1.0 °C and 0.1–1.1 °C across both periods, whereas at Qarakheil it is projected to rise by 0.5–1.5°C and 0.6–1.6°C, respectively. Under the SSP5-8.5 scenario, the largest increases in precipitation are anticipated during the cold months, potentially heightening flood risk and inducing substantial shifts in rainfall patterns. These results highlight the necessity for comprehensive water and soil resource management strategies, periodic reassessment and modernization of flood-control infrastructure, and the implementation of adaptive measures to mitigate climate-induced hazards.

کلیدواژه‌ها English

Climate change
Soleyman-Tangeh
Qarakheil
Climate model
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