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پهنه‌بندی سیلاب و شبیه‌سازی رفتار هیدرولیک رودخانه با استفاده از نرم‌افزار HEC RAS (مطالعۀ موردی: رودخانۀ مارون - جنوب غرب ایران) | ||
| اکوهیدرولوژی | ||
| مقاله 10، دوره 7، شماره 2، تیر 1399، صفحه 397-409 اصل مقاله (1.26 M) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ije.2020.298473.1293 | ||
| نویسندگان | ||
| خسرو شفیعی مطلق1؛ ناصر عبادتی* 2 | ||
| 1استادیار گروه مهندسی عمران، واحد دهدشت، دانشگاه آزاد اسلامی، دهدشت، ایران | ||
| 2دانشیار گروه زمین‌شناسی، واحد اسلامشهر، دانشگاه آزاد اسلامی، اسلامشهر، ایران | ||
| چکیده | ||
| تحقیق حاضر با هدف پهنه‌بندی سیلاب و تعیین حد بستر و حریم رودخانۀ مارون با استفاده از نرم‌افزار HEC-RAS در محیط GIS پیریزی شد. با استفاده از نرم‌افزار GIS نقشههای کاربری اراضی، توپوگرافی، و مدل رقومی ارتفاع تهیه شد. در گام بعد، مشخصات شبکۀ رودخانهای و مشخصات هندسی رودخانه با استفاده از نرم‌افزار HEC- GeoRAS استخراج شد. در نهایت، با استفاده از مدل هیدرولوژیکی HEC-HMS اقدام به مدلسازی و تخمین دبی سیلاب شد. در گام سوم، نتایج مربوط به مدل HEC-HMS همراه با مشخصات هندسی استخراج‌شده از مدل HEC-GeoRAS به مدل HEC-RAS برای مدلسازی هیدرولیکی رودخانۀ مارون وارد شد. در مرحلۀ بعد، نتایج به‌دست‌آمده از مدل هیدرولیکی HEC-RAS به نرم‌افزار Arc GIS منتقل شد و با استفاده از دادههای موجود، عمل پهنه‌بندی سیلاب برای سیلاب با دورۀ بازگشتهای 5، 10، 25 و 50 سال صورت گرفت. از 5 رویداد سیل که در ایستگاه آبسنجی و ایستگاه باراننگار تنگتکاب که دادههای ثبت‌شدۀ مناسبی داشتند، 2 رویداد برای واسنجی و 3 رویداد برای ارزیابی در نظر گرفته شد. نتایج مدل با شاخص RMSE به عنوان تابع هدف صحتسنجی شد. نتایج تحقیق نشان داد مساحت سیلخیزی برای دورههای بازگشت 5، 10، 25 و 50 ساله به‌ترتیب برابر با 1265، 1651، 2334 و 4450 هکتار و تعداد روستاهای در معرض خطر به‌ترتیب برابر با 5، 3، 2 و 9 هستند. | ||
| کلیدواژه‌ها | ||
| حوضۀ مارون؛ سیلاب؛ Arc GIS؛ HEC-RAS | ||
| عنوان مقاله [English] | ||
| Flood Zoning and Hydraulic Behavior Simulation Using HEC RAS in (GIS) (Case Study: Maroon River - Southwestern Iran) | ||
| نویسندگان [English] | ||
| Khosro Shafiei Motlagh1؛ Naser Ebadati2 | ||
| 1Assistant Prof. Professor, Department of civil Engineering, Dehdasht Branch, Islamic Azad University, Dehdasht, Iran | ||
| 2Associate Professor, Department of geology, Islamshar Branch, Islamic Azad University, Islamshar, Iran | ||
| چکیده [English] | ||
| The present project was designed with the aim of zoning the flood and determining the limits of the boundary and the boundaries of the Maroon River using the software (GIS) and HEC -RAS. The (HEC-HMS) model was used to simulate the flood hydrograph and determine the flood characteristics including peak discharge and run-off volume in Maroon watershed. Using (GIS) software, land surface maps, topography, curve numbers and elevation digital models were developed. In the next step, the profile of the river network and the geometric characteristics of the river were extracted using the (HEC-GeoRAS) toolbox. Finally, modeling and flood discharge estimation were done using (HEC-HMS) hydrologic model. And the results of the (HEC-HMS) model were combined with the geometric specification extracted from the (HEC-GeoRAS) model to the (HEC-RAS) model for the hydraulic modeling of the Maroon River. The final step is to transfer these results from the (HEC-RAS) hydraulic model to the Arc (GIS) software. At this stage, using available data, flood zoning was conducted for flood with a return period of 5, 10, 25 and 50 years. In this project, five flood events, which were well documented at the Tang-e-Takab Rain Station, were selected to calibrate and evaluate the model. The results of this study indicate that the flood area for 5, 10, 25 and 50 years return periods was 1265, 1651, 333 and 4450 ha, and the number of vulnerable villages arrangements equal to 2.3, 4 and 9 villages are in jeopardy. | ||
| کلیدواژه‌ها [English] | ||
| Flood, Maroon Basin, (HEC-RAS), Arc (GIS) | ||
| مراجع | ||
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