مدل شبیه‌سازی کمّی-کیفی اندرکنش آبراهه با سفره آب زیرزمینی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار دانشکده مهندسی عمران، دانشگاه صنعتی اصفهان

2 استاد دانشکده مهندسی عمران، دانشگاه علم و صنعت ایران

3 دانشیار دانشکده مهندسی عمران، دانشگاه علم و صنعت ایران

4 استاد دانشکده مهندسی عمران، دانشگاه صنعتی شریف

5 دانشیار دانشکده مهندسی عمران، دانشگاه صنعتی شریف

چکیده

شبیه‌سازی اندرکنش کمّی و کیفی آبراهه با سفره آب زیرزمینی به عنوان ابزاری کارآمد برای مدیریت حوضه‌های آبریز مطرح می‌باشد و از آنجا که تاکنون مدل‌های توزیعی ارائه شده در مقیاسهای بزرگ به طور مجزا در نظر گرفته شده و در بیشتر موارد فقط اندرکنش‌های کمّی اعمال ‌گردیده، هدف اصلی این تحقیق تلفیق زیرمدل‌های چهارگانه به صورت توزیعی در مقیاسهای بزرگ می باشد. در این تحقیق جریان در آبراهه نادائمی، یک بعدی و در لایه آبدار اشباع سه بعدی و نادائمی فرض شده است. فرآیندهای انتقال، پخشیدگی، واکنش‌های شیمیایی و جذب به صورت پیوسته در محیط متخلخل و آبراهه در نظر گرفته شده است. براساس تحقیقاتی که تاکنون انجام شده، مدل اندرکنشی همزمان (مزدوج) جهت حل معادلات کیفی آبراهه با آبهای زیرزمینی ارائه نشده است و در این تحقیق نیز تلفیق کیفی این دو زیرمدل به صورت غیرمزدوج به صورت اعمال شرایط مرزی و اولیه حاصل از نتیجه اجرای مدل شبیه‌سازی کیفی آبراهه جهت اجرای مدل شبیه‌سازی کیفی آبهای زیرزمینی انجام گرفته شده است. مرحله تصدیق مدل نیز انجام و جوابهای مدل با جوابهای تحلیلی موجود مورد مقایسه قرار گرفته است. نتایج نشان می‌دهد که تفاوت نسبی جوابهای تحلیلی با مدل کمتر از 2 درصد می باشد.

کلیدواژه‌ها


عنوان مقاله [English]

A Quality-Quantity Simulation Model for Stream-Aquifer Interaction

نویسندگان [English]

  • Hamidreza Safavi 1
  • Abbas Afshar 2
  • Abbas Ghaheri 3
  • Ahmad Abrishamchi 4
  • Masoud Tajrishi 5
1 Assistant Professor of Civil Engineering, Isfahan University of Technology
2 Professor of Civil Engineering, Iran University of Science and Technology
3 Associate Professor of Civil Engineering, Iran University of Science and Technology
4 Professor of Civil Engineering, Sharif University of Technology
5 Associate Professor of Civil Engineering, Sharif University of Technology
چکیده [English]

Traditional lumped and conceptual hydrological models are appropriate for dealing with certain aspects of a major portion of current water resources management. However, more advanced tools are required for integrated water resources management. In this research, an integrated model to account for qualitative and quantitative stream-groundwater interactions is developed for application in large-scale, integrated, water resources management. One of the challenges in understanding the interactions between stream and groundwater systems lies in their different time scales. In this paper, the stream quantity model is developed and is embedded into groundwater quantity model using the couple method. Then the stream quality model and the groundwater quality model are integrated using an uncouple approach, with mesh generation to ensure stability of the numerical method. Confirmation of the coupled-uncoupled model was examined using analytical solution from previous studies.

کلیدواژه‌ها [English]

  • Stream
  • Groundwater Aquifer
  • Water Quality
  • Interaction
  • Numerical Solution
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