بررسی کارایی مدل هیدرولوژیک HEC- HMS در شبیه‏ سازی هیدروگراف سیلاب حوضه‏ های آبخیز جنگلی (مطالعة موردی: جنگل خیرود)

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی‏ ارشد مهندسی جنگل، دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران

2 دانشیار گروه جنگل‌داری و اقتصاد جنگل، دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران

3 دانشیار گروه احیاء مناطق خشک و کوهستانی، دانشکدة منابع طبیعی دانشگاه تهران، کرج، ایران

چکیده

روش شمارة منحنی سرویس حفاظت خاک (SCS-CN) از روش‌های بسیار کاربردی است که به‌طور گسترده برای پیش‌بینی رواناب مستقیم ناشی از بارندگی در نقاط مختلف دنیا استفاده می‌شود. در این مطالعه، برای تهیة نقشة شمارة منحنی و ورود اطلاعات مدل فیزیکی حوضة آبخیز خیرود به برنامة HEC-HMS، از الحاقیة HEC-GEOHMS، نرم‌افزار ArcGIS و تصاویر ماهواره‌ای Google Earth استفاده شد. همچنین به منظور آنالیز آماری داده‌های حداکثر بارش روزانة ایستگاه باران‌سنجی، برای ورود مدل هواشناسی حوضه به برنامه HEC-HMS، از نرم‌افزارهای SPSS، Excel، Easy Fit و Curve Expert استفاده شد و هیدروگراف سیلاب با دورة بازگشت‏های 2، 5 ،10، 25، 50 و 100 سال شبیه‌سازی شد. در‌نهایت برای واسنجی مدل پس از بررسی داده‏های هیدرومتری ایستگاه خیرود، بین سه واقعة متناظر جهت واسنجی و اعتبارسنجی، دو واقعه جهت واسنجی و یک واقعه جهت اعتبارسنجی مدل استفاده شد. نتایج مربوط به دبی اوج خروجی از هریک از زیرحوضه‏ها‏ نشان داد A1 با بیشترین دبی اوج در رتبة اول سیل‌خیزی و زیرحوضة B2 نیز به دلیل کمترین وسعت در بین سایر زیرحوضه‏ها در رتبة آخر سیل‌خیزی قرار دارد. همچنین، کارایی مدل HEC-HMS پس از واسنجی آن برای شبیه‌سازی دبی اوج سیلاب در حوضة مطالعه‌شده، مورد تأیید است.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluating the HEC-HMS Hydrologic Model in Order to Simulating Flood Hydrograph in Forest Basin (Case Study: Kheyrud Forest)

نویسندگان [English]

  • Maryam Moradnezhadi 1
  • Meghdad Jourgholami 2
  • Arash Malekian 3
1 MSc. Student of Forest Engineering, Faculty of Natural Resources, University of Tehran, Karaj, I.R. Iran
2 Associate Professor, Department of Forestry and Forest Economics, Faculty of Natural Resources, University of Tehran, Karaj, I.R. Iran
3 Associate Professor, Department of Range and Watershed Management, Faculty of Natural Resources, University of Tehran, Karaj, I.R. Iran
چکیده [English]

Soil Conservation Service Curve Number method (SCS-CN) is a widely applied technique for predicting direct runoff from rainfall has been used around the world. In this study, the curve number maps and entry physical model data of Kheyrud basin to HEC-HMS model, the HEC-GEOHMS extension in ArcGIS software and Google Earth satellite images were used. In addition to the statistical analysis of survey data of maximum daily rainfall in rainfall stations, and entry the basin meteorological model into HEC-HMS, the SPSS, Excel, Easy Fit, and Curve Expert were used. Flood hydrograph in 2, 5, 10, 25, 50 and 100 years return periods have been simulated. Finally, in order to model calibration, after a review of hydrometric data of Kheyrud station, three events corresponding to the calibration and validation, two events were used for model calibration and one event was used for validation. The results of the peak flow output from each sub basin showed that A1 sud basin with a maximum peak flow was located in the first place of floodness and the B2 sub basin are ranked in the last place of floodness due to the minimum size compared to the other sub basins. Result showed that the performance of the calibrated HEC-HMS model to simulate the flood peak flow has been approved in the studied area

کلیدواژه‌ها [English]

  • Kheyrud forest
  • floodness
  • HEC-HMS model
  • simulation
  • validation
 

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