نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانش آموخته گروه آب و خاک، دانشکده کشاورزی، دانشگاه صنعتی شاهرود.

2 استادیار گروه آب و خاک، دانشکده کشاورزی، دانشگاه صنعتی شاهرود

3 دانشیار گروه آب و محیط زیست، دانشکده عمران. دانشگاه صنعتی شاهرود

4 استادیار گروه آب و خاک، دانشکده کشاورزی، دانشگاه صنعتی شاهرود.

چکیده

ارزیابی مخاطرات سیلاب موضوع مهمی است که می‌تواند منجر به کاهش خسارات سیل گردد. مدلسازی بارش-رواناب نقش کلیدی در مدیریت منابع آب و همچنین جلوگیری از مخاطرات سیل بازی می‌کند. اما استفاده از مدل‌های هیدرولوژیکی به منظور شبیه‌سازی رواناب نیازمند واسنجی پارامترهای مختلف می‌باشند. از این رو، در مطالعه حاضر مدل WMS11.0 جهت شبیه‌سازی دبی اوج و حجم سیلاب‌های حوضه بابلرود مورد ارزیابی قرار گرفت. برای واسنجی و اعتبارسنجی مدل به ترتیب از 3 و 2 رخداد بارش استفاده شد. سپس باران طرح منطقه مورد مطالعه، با دوره بازگشت‌های مختلف (2، 5، 10، 25، 50، 100 و 500 ساله) تعیین و سیلاب ناشی از این بارش‌ها شبیه‌سازی گردید. نتایج نشان داد که مدل WMS می تواند با دقت خوبی دبی اوج (با خطای حدود 5 درصد) و حجم سیلاب (با خطای کمتر از 26 درصد) را برآورد کند. اما مدل قادر نبود شکل هیدروگراف را با دقت خیلی خوبی شبیه‌سازی نماید. همچنین مشخص شد که دبی اوج و حجم سیلاب ناشی از بارش‌های طرح 2 تا 500 ساله، به ترتیب بین 50 تا 300 مترمکعب بر ثانیه و 6/6 تا 4/32 میلیون مترمکعب متغیر می‌باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Estimating Floods of Various Return Periods for Babolrood Catchment Using WMS Model

نویسندگان [English]

  • Toktam Imani 1
  • Mahdi Delghandi 2
  • Samad Emamgholizadeh 3
  • Zahra Ganji Noroozi 4

1 Department of Water and Soil, Faculty of Agricultural Engineering, Shahrood University of technology.

2 Department of Water and Soil, Faculty of Agricultural Engineering, Shahrood University of technology

3 Department of Water and Environmental Engineering, Faculty of Civil, Shahrood University of technology.

4 Department of Water and Soil, Faculty of Agricultural Engineering, Shahrood University of technology.

چکیده [English]

Flood hazard assessment is an important topic that can reduce flood-related losses. Rainfall-runoff modeling plays a key role in the management of water resources in addition to protecting from flood hazards. The use of hydrological models to simulate the runoff necessitates the proper calibration of the different parameters. Therefore, In the present study, the Watershed Modeling System (WMS11.0) was evaluated to simulate peak discharge and volume of floods of Babolrood catchment. WMS model calibrated and validated using 3 and 2 rainfall events, respectively. Afterwards, design precipitation (DP) for 2, 5, 10, 25, 50, 100 and 500-year return periods was determined and flood resulting from DPs simulated. The results showed that the WMS model could accurately estimate the peak discharge (the error was about 5%) and the and flood volume (the error was less than 26%). But the model was not able to simulate properly the shape of the hydrograph. It also revealed that peak discharge and flood volume arising from 2 to 500-year return periods of rainfall vary between 50 to 300 m3/s and 6.6 to 32.4 Mm3, respectively.

کلیدواژه‌ها [English]

  • Rainfall-runoff
  • design precipitation
  • peak discharge modeling
  • flood hydrograph
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