شبیه‌سازی رسوب‌گذاری در مخازن سدها با استفاده از مدل WASA-SED (مطالعه موردی سد باراسونا- اسپانیا)

نوع مقاله : مقاله پژوهشی

چکیده

در این مقاله الحاقیه جدید مدلWASA-SED که با هدف شبیه‌سازی فرآیند رسوب‌گذاری در مخازن سدها توسعه یافته مورد ارزیابی قرار گرفته است. برای ارزیابی الحاقیه جدید مدل واسا، فرآیند رسوب‌گذاری در مخزن سد باراسونا (اسپانیا) که در ناحیه­ای با فرسایش پذیری بالا قرار دارد مورد بررسی قرار گرفت. مهمترین پارامتر در شبیه‌سازی رسوب‌گذاری در مخازن سدها تعیین ضخامت لایه فعال است از اینرو برای واسنجی مدل و تعیین ضخامت لایه فعال از آمار و اطلاعات مربوط به دو بازه زمانی که یکی مربوط به دوران بهره‌برداری عادی از مخزن (1986 تا 1993) و دیگری دوران بهره‌برداری همراه با انجام عملیات فلاشینگ در مخزن بوده (1995 تا 1997) استفاده گردید. پس از تعیین ضخامت لایه فعال، فرآیند رسوب‌گذاری با استفاده از مدل واسا برای دوره زمانی 1998 تا 2006 شبیه‌سازی شد و با اطلاعات برداشت شده از مخزن سد مورد مقایسه قرار گرفت نتایج مقایسه نشان می دهد الحاقیه جدید مدل واسا در شبیه‌سازی رسوب‌گذاری در مخازن سدهایی که در حوضه های آبخیز با فرسایش پذیری بالا قرار گرفته اند از دقت مناسبی برخوردار است.

کلیدواژه‌ها

عنوان مقاله [English]

Simulation of Sedimentation in Dam Reservoirs Using WASA-SED Model (Case Study: Barasona Dam, Spain)

چکیده [English]

In this article the new sediment module of WASA-SED that aims at simulating the process of sedimentation in reservoirs is developed and evaluated. To evaluate this new module of WASA-SED, the process of sedimentation in Barasona dam reservoir (Spain), located in a region with high erosion, was examined. The most important parameter in the simulation of sedimentation in reservoirs is to determine the thickness of the active layer. Hence, for the calibration of the model, the relevant data of two time intervals when one was related to the period of normal operation of the reservoir (1986-1993) and another one to a period of the operation time along with the flushing (1995 to 1997) were used. After determining the active layer thickness, the sedimentation process was simulated for the period 1998-2006. The results of the simulation were compared with the dam reservoir hydrographic information. The results of the comparison showed that the new module of WASA-SED for simulation of sedimentation in dam reservoirs in regions with high erosion had a  proper accuracy.

کلیدواژه‌ها [English]

  • Barasona
  • dam reservoir
  • Sedimentation
  • Simulation
  • WASA-SED

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