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تهیۀ نقشۀ خطر وقوع سیلاب در حوضۀ آبریز گمناب‌چای با استفاده از مدل ANP و تکنیک GIS | ||
| اکوهیدرولوژی | ||
| مقاله 17، دوره 7، شماره 2، تیر 1399، صفحه 497-509 اصل مقاله (1.5 M) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ije.2020.298759.1298 | ||
| نویسندگان | ||
| داود مختاری* 1؛ محمدحسین رضائی مقدم1؛ توحید رحیم پور2؛ سمیه معزز2 | ||
| 1استاد گروه ژئومورفولوژی، دانشکدۀ برنامهریزی و علوم محیطی، دانشگاه تبریز | ||
| 2دانشجوی دکترای ژئومورفولوژی، دانشکدۀ برنامهریزی و علوم محیطی، دانشگاه تبریز | ||
| چکیده | ||
| مناطق کوهستانی شمال غرب کشور بهدلیل توپوگرافی خاص خود و بارش تقریباً مناسب طی سال و بهخصوص در فصل بهار، ازجمله مناطق مستعد وقوع مخاطرۀ سیل هستند. تحقیق حاضر با هدف تهیۀ نقشۀ پهنهبندی خطر وقوع سیلاب در حوضۀ آبریز گمناب‌چای واقع در استان آذربایجان شرقی انجام گرفته است. برای تهیۀ نقشۀ پهنهبندی خطر وقوع سیل از 10 فاکتور مؤثر در وقوع این پدیده استفاده شده است که عبارتاند از: بارش، لیتولوژی، کاربری اراضی، شیب، تراکم پوشش گیاهی، شاخص قدرت آبراهه، شاخص رطوبت توپوگرافیک، تراکم زهکشی، شاخص حمل رسوب، ضریب گراویلیوس. بهمنظور وزن‌دهی معیارها در تحقیق حاضر از روش تحلیل شبکهای (ANP) و نرمافزار Super Decisions استفاده شد. نتایج نهایی به‌دست‌آمده از تحقیق حاضر نشان داد وزن معیارهای 10 گانۀ یادشده به‌ترتیب 271/0، 201/0، 150/0، 118/0، 081/0، 056/0، 043/0، 032/0، 025/0 و 018/0 است که معیارهای بارش، لیتولوژی، کاربری اراضی و شیب بیشترین وزن را داشتهاند. درنهایت، با تلفیق این لایهها با توجه به وزنشان در محیط GIS، نقشۀ پهنهبندی به دست آمد. نتایج نشان داد 210 کیلومترمربع (50 درصد) از مساحت منطقه در معرض خطر وقوع سیلاب قرار دارد. بنابراین، لزوم مدیریت آبهای سطحی در منطقه بهمنظور جلوگیری از وقوع سیل و همچنین بهرهبرداری مناسب از آبهای منطقه ضروری به نظر میرسد. | ||
| کلیدواژه‌ها | ||
| حوضۀ آبریز گمناب‌چای؛ سیل؛ مدل ANP؛ Super Decisions | ||
| عنوان مقاله [English] | ||
| Preparing the Risk Map of Flood Occurrence in the Ghomnab Chai Basin Using ANP Model and GIS Technique | ||
| نویسندگان [English] | ||
| Davod Mokhtari1؛ Mohammad Hossein Rezaei Moghaddam1؛ Tohid Rahimpour2؛ Somayyeh Moazzez2 | ||
| 1Professor of Geomorphology, Department of Geomorphology, Faculty of Planning and Environmental Sciences, University of Tabriz, Iran | ||
| 2PhD Student in Geomorphology, Department of Geomorphology, Faculty of Planning and Environmental Sciences, University of Tabriz, Iran | ||
| چکیده [English] | ||
| The mountainous areas of northwest of the country are susceptible to flood risk due to their topography and relatively good rainfall throughout the year, especially in spring. The aim of this study was to prepare a map of the risk of flooding in the Gomanab Chai catchment, which is located in the East Azerbaijan province. 10 effective factors in the occurrence of this phenomenon, such as Precipitation, Lithology, Land use, Slope, Vegetation density, Stream Power Index, Topographic wetness index, Drainage density, Sediment Transport Index, Gravelius coefficient were used to prepare the zoning map. Network Analysis Method (ANP) and Super Decisions software were used to weighting the criteria in this study. The final results obtained from the present study showed that the weight of the 10 criteria were 0.271, 0.201, 0.150, 0.118, 0.081, 0.056, 0.043, 0.032, 0.025 and 0.018 respectively. Precipitation, lithology, land use and slope had the highest weights, respectively. Finally, by combining these layers according to their weight in GIS, the zoning map was obtained. The results showed that 210 km2 (50%) of the area is at risk of flooding. Therefore, the necessity of managing surface water in the area seems necessary in order to prevent flooding as well as proper exploitation of the waters of the area. | ||
| کلیدواژه‌ها [English] | ||
| Flood, ANP model, Super Decisions, Ghomnab Chai Basin | ||
| مراجع | ||
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