شبیه‌سازی هیدروگراف جریان رودخانه با مدل هیدرولوژیکی-توزیعی انعطاف‌پذیر WetSpa-Python

نوع مقاله : یادداشت فنی (5 صفحه)

نویسندگان

1 دانش‌آموخته دکتری علوم و مهندسی آبخیزداری دانشگاه علوم کشاورزی و منابع طبیعی گرگان-ایران.

2 استاد دانشگاه علوم کشاورزی و منابع طبیعی گرگان-ایران.

3 دانشیار دانشگاه علوم کشاورزی و منابع طبیعی گرگان-ایران.

4 استادیار دانشگاه علوم کشاورزی و منابع طبیعی گرگان-ایران.

5 دانشجوی دکتری علوم و مهندسی آبخیزداری دانشگاه علوم کشاورزی و منابع طبیعی گرگان-ایران.

چکیده

مدل‌های شبیه‌سازی هیدرولوژیکی ابزارهای ارزشمندی برای بررسی موضوعات چالش‌برانگیز مرتبط با مدیریت حوضه آبخیز هم­چون اثر تغییر اقلیم بر منابع آب، تأثیر شهرسازی بر سیلاب­‌ها و خشکسالی‌­ها هستند. در این مقاله از مدل شیءگرا، مدولار و فرآیندمحور WetSpa-Phyton که بر اساس رویکرد مدل­‌سازی انعطاف‌­پذیر تهیه شده و با زبان برنامه‌­نویسی پایتون کدنویسی شده است، جهت شبیه‌سازی هیدروگراف روزانه در حوضه ارازکوسه استفاده شده است. ورودی‌­های مدل شامل نقشه­‌های رقومی ارتفاع، تیپ خاک و کاربری اراضی و سری­‌های زمانی بارش، دما و تبخیر است که از آمار 9 ایستگاه هواشناسی در یک دوره ده ساله (سال آبی 85-84 تا 94-93) استفاده گردید. واسنجی مدل به‌­طور محدود با تخصیص مقادیر منطقی به 8 پارامتر گلوبال (کلی) مدل، بر مبنای بهترین انطباق بین هیدروگراف شبیه‌سازی و مشاهده­‌ای انجام شد. ارزیابی مدل بر اساس شاخص کلینگ-گوپتا، صورت گرفت که به‌­ترتیب برای دوره واسنجی و اعتبارسنجی مقادیر 0/6 و 0/52 به­دست آمد. هم­چنین نتایج محاسبات بیلان آبی توسط مدل نشان داد که جریان خروجی از حوضه به ترتیب 13/2 و 18/1 درصد از کل بارش را در دوره واسنجی و اعتبارسنجی به خود اختصاص داده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Simulation of Stream Flow Hydrographs Using Flexible Distributed Hydrological Modelling (WetSpa-Python)

نویسندگان [English]

  • Muhammad Ozhan 1
  • Abdolreza Bahremand 2
  • Vahedberdi Sheikh 3
  • Choghibairam Komaki 4
  • Maryam Mohammadrezaei 5
1 Ph.D. Graduate of Watershed Management Sciences and Engineering, Gorgan University of Agricultural Sciences & Natural Resources, Iran.
2 Professor of Agricultural Sciences & Natural Resources, Gorgan University, Iran.
3 Associate Professor of Agricultural Sciences & Natural Resources, Gorgan University, Iran.
4 Assistant professor of Agricultural Sciences & Natural Resources, Gorgan University, Iran.
5 Ph.D. Candidate of Watershed Management Sciences and Engineering, Gorgan University of Agricultural Sciences & Natural Resources, Iran.
چکیده [English]

Hydrological simulation models are valuable tools for examining challenging issues related to watershed management such as the impact of climate change on water resources, the impact of urban planning on floods and droughts. In this study, WetSpa-Python model was developed to simulate daily flow hydrographs at the Arazkouse basin. This is an object-oriented, process-based modular model which has been developed based on the principles of flexible modeling in python. Data inputs included DEM, soil type, land-use, precipitation time series, temperature, and evapotration, which were acquired from nine meteorological stations for a ten-year period (from 2006-07 to 2015-16). Model calibration was performed in a limited manner by assigning rational values to 8 global parameters based on the best fit between the simulated and observed hydrographs. Model performance was tested via the Kling-Gupta index, and obtained 0.6 and 0.52 for the calibration and validation periods, respectively. The results of the water-balance analysis with the model indicated that the outflow of the basin constitutes 13.2 and 18.1% of total precipitation in the calibration and validation periods. 

کلیدواژه‌ها [English]

  • Flexible modelling
  • WetSpa-Python
  • Runoff simulation
  • Arazkouse Basin
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