نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد آبخیزداری، گروه مرتع و آبخیزداری دانشگاه صنعتی خاتم الانبیاء بهبهان.

2 استادیار گروه مهندسی طبیعت دانشگاه علوم کشاورزی و منابع طبیعی خوزستان

3 استادیار گروه مهندسی منابع طبیعی- آبخیزداری، دانشگاه یاسوج.

10.22055/jise.2017.19100.1433

چکیده

به­منظور مدیریت رواناب شهری لازم است میزان رواناب به درستی برآورد گردد. از جمله مدل­های پرکاربرد برای برآورد رواناب شهری، مدل SWMM است که یک برای یک واقعه رگبار و یا برای داده­های پیوسته سری زمانی کیفیت و کمیت رواناب را
شبیه­سازی نماید. هدف از تحقیق حاضر ارزیابی کارآئی کانال­های جمع­آوری رواناب با استفاده از مدل
SWMM در حوضه شهری لیکک است. به این منظور ابتدا کارایی مدل مورد ارزیابی قرار گرفت. برای واسنجی مدل از سه واقعه بارندگی و به­منظور ارزیابی و اعتبار­سنجی مدل از دو واقعه استفاده شد. کارایی مدل در براورد دبی اوج و حجم جریان با استفاده از ضریب ناش - ساتکلیف، خطای مجموع مربعات و ضریب BIAS مورد ارزیابی قرار گرفت. نتایج حاصل از واسنجی مدل نشان داد که دبی اوج و حجم جریان شبیه­سازی انطباق خوبی با مقادیر مشاهداتی دارد (74/0NS=، 0052/0RMSE=، 48/10BIAS%=) و از نتایج به­دست آمده در واسنجی برای برآورد مقدار بهینه پارامترها استفاده شد. به­منظور ارزیابی و اعتبار­سنجی مدل از دو واقعه مجزا از مرحله واسنجی استفاده شد. نتایج حاصل از ارزیابی، کارایی و دقت مدل را تأیید می­کند (58/0NS=، 0027/0RMSE=، 95/10BIAS%=). با استفاده از بارش طرح و مقادیر بهینه پارامترها، اقدام به شبیه­سازی شبکه جمع­آوری رواناب گردید. نتایج نشان داد که مدل SWMM کارایی خوبی در شبیه­سازی دبی اوج و حجم سیلاب دارد. همچنین نتایج بیانگر این بود که کانال­های موجود در شهر کارایی کافی در انتقال رواناب را ندارند و در بارش­های با دوره­های برگشت مختلف ممکن است باعث آبگرفتگی شوند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Evaluating the Performance of Collection and Disposal of Surface Runoff Network Using SWMM Model (Case Study: the City of Likak, Kohgiluyeh and Boyer Ahmad Province)

نویسندگان [English]

  • Fatemeh Taatpour 1
  • Zohreh Khorsandi Kouhanestani 2
  • Mohsem Armin 3

1 M.Sc. Graduate, Department of Range and Watershed Management Engineering, The Faculty of Natural Resources, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran.

2 Assistant professor - Department of Nature Engineering, Agricultural science and Natural Resources University of Khuzestan, Mollasani, Iran

3 Assistant professor, Department of Natural Resources Engineering-Watershed Management, Yasouj University, Yasouj, Iran.

چکیده [English]

Flood is one of the most dangerous and destructive phenomena which endangers people’s lives and properties all around the world. According to statistics of a 30-year period (1974-2003), about 2162 major floods have occurred which constitute 34% of the world's disasters (Tajbakhsh and Khodashenas, 2012). Floods are frequent and ruinous in Iran due to severe weather condition. Several factors intensify the risk of flood in urban areas including urbanization, land use changes, inappropriate drainage systems, and impermeable area development (Sabeti, 2011).
Likak has faced numerous floods due to high rain density, high rate of urban development, unsafe and unproductive urban development, ignoring safety criteria in developing urban areas, road watering issues, inefficient drainage systems, and inefficacious water channels. Water channels and drainage issues have never been evaluated in this town. Applying an effective runoff management plan is the ultimate solution for the problem of flood in Likak. Storm Water Management Model (SWMM) is one of the most reliable and prevailing models for evaluating and managing the urban runoff issue. SWMM is a dynamic rainfall-runoff simulator which can be used for simulating the quantity and quality of the run-off for a single raining event or continuous long-term rains (Gironas et al, 2010). Yu et al. (2014) adapted and calibrated SWMM to Jinan, a typical piedmont city in China. Fourteen storms were used for model calibration and validation, finally verifying large-scale applicability of the model to piedmont cities. Results of this study verified that SWMM is applicable to  large-scale cities.

کلیدواژه‌ها [English]

  • urban flood
  • runoff simulation
  • SWMM
  • drainage system

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