5.پهنه‌بندی خطر سیلاب و ارتباط آن با کاربری اراضی با استفاده از مدل فرایند تحلیل شبکه (مطالعه موردی: حوضه آبخیز رضی‌چای، استان اردبیل)

نوع مقاله : مقاله علمی پژوهشی

نویسندگان

1 استاد گروه جغرافیای طبیعی، دانشکده علوم اجتماعی، دانشگاه محقق اردبیلی، اردبیل، ایران.

2 دانشجوی کارشناسی ارشد گروه جغرافیای طبیعی، دانشکده علوم اجتماعی، دانشگاه محقق اردبیلی، اردبیل، ایران.

3 دانشجوی دکتری گروه جغرافیای طبیعی، دانشکده علوم اجتماعی، دانشگاه محقق اردبیلی، اردبیل، ایران.

چکیده
زمینه و هدف: سیلاب‌ها یکی از پدیده‌های طبیعی هستند که می‌توانند خسارات زیادی به زیرساخت‌ها، مزارع و محیط‌زیست وارد کنند. این پدیده به طور عمده به دلیل بارش‌های سنگین، ذوب برف‌ها یا ترکیبی از این عوامل رخ می‌دهد. بنابراین هدف از این پژوهش پهنه‌بندی خطر سیلاب و ارتباط آن با کاربری اراضی با استفاده از مدل فرایند تحلیل شبکه در حوضه آبخیز رضی چای در استان اردبیل است.
روش‌شناسی: دراین پژوهش با استفاده از تصاویر ماهواره‌ای لندست 8 مربوط به سال 2022، نقشه DEM 30 متر استر، نقشه توپوگرافی با مقیاس 1:50000، نقشه زمین شناسی با مقیاس 1:250000 و همچنین استفاده از سایر اطلاعات تفضیلی حوضه مورد مطالعه 10 پارامتر تاثیرگذار در رخداد سیل که شامل: ارتفاع، شیب، جهت شیب، پوشش گیاهی، سازندهای زمین شناسی، فاصله از رودخانه، جهت جریان، کاربری اراضی، بارش، تراکم زهکشی مورد استفاده قرار گرفته و برای تعیین اهمیت هر متغیر از مدل فرآیند شبکه تحلیلی (ANP) استفاده شد.
یافته‌ها و نتیجه‌گیری: ازمیان پارامترهای مورد مطالعه، لایه‌های شیب (با ضریب 30 درصد)، ارتفاع (با ضریب 21 درصد)، کاربری اراضی (با ضریب 17 درصد) وزن بیش‌تری را کسب کردند. در نتیجه وقوع سیلاب در حوضه آبریز رضی چای را به شدت کنترل می‌کنند. نتایج نشان می‌دهد که حدود 36 درصد از حوضه آبریز رضی‌چای در مناطق پرخطر و بسیار پرخطر قرار دارد. این پهنه‌ها در قسمت پایین حوضه، به طور معمول در تقاطع دو آبراهه اصلی حوضه قرار دارند. با توجه به پراکندگی فضایی سکونتگاه‌ها در منطقه می‌توان گفت که اکثر سکونتگاه‌های قسمت پایین حوضه در معرض سیلاب قرار دارند.

کلیدواژه‌ها

موضوعات


عنوان مقاله English

Flood Hazard Zoning and Its Relationship with Land Use Using the Analytic Network Process Model (Case Study: Razi Chay Watershed, Ardabil Province)

نویسندگان English

Mousa Abedini 1
Houmeyra Sabouri 2
AmirHesam Pasban 3
1 Professor, Department of Physical Geography, Faculty of Social Sciences, University of Mohaghegh Ardabili, Ardabil, Iran
2 M.Sc. Student, Department of Physical Geography, Faculty of Social Sciences, University of Mohaghegh Ardabili, Ardabil, Iran
3 Ph.D Student, Department of Physical Geography, Faculty of Social Sciences, University of Mohaghegh Ardabili, Ardabil, Iran.
چکیده English

Background and Objective: Floods are one of the natural phenomena that can cause significant damage to infrastructure, farmlands, and the environment. This phenomenon primarily occurs due to heavy rainfall, snowmelt, or a combination of these factors. Therefore, the aim of this study is to map flood hazard zones and examine their relationship with land use using the Analytic Network Process (ANP) model in the Razi Chay watershed in Ardabil Province.
Methodology: In this study, data from Landsat 8 satellite imagery from 2022, a 30-meter ASTER DEM map, a 1:50,000 scale topographic map, a 1:250,000 scale geological map, and other detailed information of the studied watershed were utilized. Ten parameters influencing flood occurrence were analyzed, including elevation, slope, slope aspect, vegetation cover, geological formations, distance from the river, flow direction, land use, precipitation, and drainage density. The Analytic Network Process (ANP) model was employed to determine the importance of each variable.
Findings and Conclusion: Among the studied parameters, slope (with a weight of 30%), elevation (with a weight of 21%), and land use (with a weight of 17%) were assigned the highest weights, indicating their significant influence in controlling flood occurrence in the Razi Chay watershed. The results show that approximately 36% of the Razi Chay watershed falls within high-risk and very high-risk zones. These areas are typically located in the lower part of the watershed, often at the confluence of the two main streams. Considering the spatial distribution of settlements in the region, it can be concluded that most of the settlements in the lower part of the watershed are exposed to flood risks

کلیدواژه‌ها English

Flood
ANP
Land Use
Support Vector Machine
Razi Chay
Ardabil Province
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  • تاریخ دریافت 01 مهر 1403
  • تاریخ بازنگری 05 آبان 1403
  • تاریخ پذیرش 08 بهمن 1403
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