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پهنه‌‌بندی و پایش خطر سیل بهار 1398 خوزستان با استفاده از داده های لندست-8 | ||
| اکوهیدرولوژی | ||
| مقاله 8، دوره 7، شماره 3، مهر 1399، صفحه 647-662 اصل مقاله (1.21 M) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ije.2020.302703.1333 | ||
| نویسندگان | ||
| کریم سلیمانی* 1؛ شادمان درویشی2 | ||
| 1استاد گروه مهندسی علوم آبخیزداری، دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| 2دانشجوی کارشناسی ارشد سنجش از دور و سیستم اطلاعات جغرافیایی، مؤسسۀ آموزش عالی آبان هراز آمل | ||
| چکیده | ||
| پایش و پهنه‌‌بندی سیلاب کارکرد زیادی در کاهش خسارت‌های ناشی از آن دارد. هدف از مقالۀ حاضر، بررسی خطر سیل فروردین 1398 خوزستان با استفاده از داده‌های لندست-8 است. ابتدا پیشپردازش تصاویر در نرمافزار ENVI 5.3 انجام شد. سپس، برای پایش سیل فروردین 1398 از شاخصهای MNDWI و NDWI استفاده شد. پس از آن، نقشۀ پهنۀ خطر سیل در نرمافزار ArcGIS10.4 تهیه شد. نتایج نشان می‌دهد بخشهای جنوب و جنوب غربی از وضعیت خیلی شدید و بخشهای مرکزی و جنوب شرقی از وضعیت شدید خطر سیل برخوردارند که از مستعدترین نواحی سیلگیر در استان هستند. همچنین، پایش نقشههای سیل در استان خوزستان نشان می‌دهد که یک انطباق کامل بین نقشۀ پهنه‌‌بندی سیل و سیل اخیر وجود دارد. بهطوری که با بررسی نقشهها مشخص شد که سیل اخیر بیشتر در بخشهای غرب، جنوب و جنوب غربی اتفاق افتاده است. بررسی مکانی نواحی سیلابی نشان می‌دهد شهرهای هویزه، دشت آزادگان، اهواز، خرمشهر، بندر ماهشهر، آبادان و به‌خصوص شادگان بیشتر از دیگر شهرها دچار سیل شدهاند. در این میان، شهر شادگان بر اساس شاخصهای MNDWI و NDWI به‌ترتیب 191349 و 174813 هکتار از اراضی آن تحت تأثیر سیل بوده است که بیشترین میزان نسبت به دیگر شهرهای استان را نشان می‌دهد. بهطور کلی، با توجه به نتایج، استفاده از داده‌های سنجشازدور و شاخصهای MNDWI و NDWI برای پایش سیل و همچنین، استفاده از سیستم اطلاعات جغرافیایی به منظور پهنه‌‌بندی نواحی خطر سیلاب در مطالعات مرتبط پیشنهاد میشود. | ||
| کلیدواژه‌ها | ||
| سنجش از دور؛ MNDWI؛ NDWI؛ GIS | ||
| عنوان مقاله [English] | ||
| Zoning and Monitoring of Spring 2019 Flood Hazard in Khuzestan Using Landsat-8 Data | ||
| نویسندگان [English] | ||
| Karim Solaimani1؛ Shadman Darvishi2 | ||
| 1Professor, Deptrtment of Watershed Management, Sari Agriculture, Science and Natural Resources University, Sari, Iran | ||
| 2M.Sc. Student of Remote Sensing & GIS, Higher Education Institute of Haraz, Amol, Iran | ||
| چکیده [English] | ||
| Flood monitoring and zoning play an important role in reducing the damage caused by this natural crisis. The purpose of this paper is to investigate the risk of flooding of April 2019 in Khuzestan using Landsat-8 data. First, image processing was performed in ENVI 5.3 software and then MNDWI and NDWI indices were used to monitor the floods. Then, the flood hazard map was prepared in ArcGIS10.4 software. The results show that the southern and southwestern parts of the province are in a very severe situation and the central and southeastern parts are in a very hazardous condition, which is one of the most prone flood areas in the province. Also, monitoring of flood maps in Khuzestan province shows that there is a complete similarity between the recent flood and flood zoning map. Examination of the maps showing that the recent floods occurred mostly in the western, southern and southwestern parts. Spatial survey of floodplain areas shows that the cities of Hoveyzeh, Azadegan Plain, Ahvaz, Khorramshahr, Bandar Mahshahr, Abadan and especially Shadegan have been flooded more than other cities. Meanwhile, Shadegan city has been affected by floods based on MNDWI and NDWI indices of 191349 and 174813 hectares, respectively, which shows the highest rate compared to other cities in the province. In general, according to the results, the use of remote sensing data and MNDWI and NDWI indices for flood monitoring, as well as the use of geographic information system for flood risk zoning in related studies are recommended. | ||
| کلیدواژه‌ها [English] | ||
| Flood zoning, MNDWI, NDWI, Landsat 8 and Khuzestan | ||
| مراجع | ||
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