توسعۀ مدلی برای محاسبۀ شاخص‎ پایداری کمی و کیفی منابع آب زیرزمینی

نوع مقاله : پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، دانشکدۀ محیط زیست دانشگاه تهران

2 دانشیار، دانشکدۀ محیط زیست دانشگاه تهران

چکیده

امروزه یکی از دغدغه‏‎های مهم در بسیاری از کشورهای جهان، تأمین آب به‌منظور توسعۀ پایدار است. برای مدیریت مؤثر منابع آب زیرزمینی به‌منظور توسعۀ پایدار از یک سو به ابزار مناسب برای مدل‎سازی و از سوی دیگر به معیاری برای محاسبۀ پایداری نیاز است. این تحقیق وضعیت پایداری آبخوان با استفاده از مدل ترکیبی را که شامل مدل‎ هیدرولوژیکی SWAT، مدل جریان آب زیرزمینی MODFLOW و مدل انتقال آلاینده MT3DMS می‌شود، در حوضۀ مطالعاتی اصفهان‌ـ برخوار بررسی می‎کند. خروجی مدل SWAT به‌عنوان ورودی مدل MODFLOW و خروجی مدل MODFLOW به‌عنوان ورودی مدل MT3DMS استفاده می‌شود. ارتفاع و غلظت آب در هر سلول مدل کمی و کیفی (MODFLOW و MT3DMS) به‌عنوان ورودی MATLAB برای محاسبۀ شاخص پایداری (با استفاده از سه معیار عملکرد اطمینان‎پذیری، برگشت‎پذیری و آسیب‎پذیری) تحت سه سناریوی مدیریتی (ادامۀ برداشت روند فعلی، افزایش 30 درصدی برداشت از آبخوان و کاهش 30 درصدی برداشت از آبخوان) استفاده می‌شود. نتایج نشان‌دهندۀ شاخص پایداری طی دورۀ شبیه‎سازی برابر 052/0 و به‌ترتیب تحت سناریوی اول، دوم و سوم برابر 040/0، 033/0 و 050/0 است. نتایج نشان می‎دهد با کاهش 30 درصدی بهره‎برداری از آبخوان، شاخص پایداری کمی و کیفی آبخوان در بیشتر نقاط به‌طور شایان توجهی بهبود خواهد یافت.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Development of a Model for Calculation of Sustainability Index of Groundwater Resources

نویسندگان [English]

  • Asghar Kamali 1
  • Mohammad Hossein Niksokhan 2
1 Msc Student, Faculty of Environment, University of Tehran
2 AssociateProfessor, Faculty of Environment, University of Tehran
چکیده [English]

Nowadays, one of the most important concerns in many countries is water supply for sustainable development. So for efficient management of groundwater resources, on the one hand, we need an appropriate tools for modeling, on the other hand, we need measure sustainability to check the performance of scenarios. This paper analyzes the sustainability condition using an integrated modeling framework that consists in sequentially a watershed agriculturally based hydrological model (Soil and Water Assessment Tool, SWAT) with a groundwater flow model developed in MODFLOW, and with a TDS mass-transport model in MT3DMS in Esfahan-Borkhar in Iran. SWAT model outputs are used as MODFLOW inputs to simulate changes in groundwater flow and storage and impacts on stream–aquifer interaction. MODFLOW output (groundwater velocity field from MODFLOW) are used as MT3DMS inputs for assessing the fate and transport of TDS. Heads and concentrations of each cell of model (MODFLOW and MT3DMS) are used to calculate the developed Sustainability Index (whith 3 performance criteria, Reliability, Resilience and Vulnerability) under three scenarios. The results indicate that SI in simulation period is 0.052 and under first, second and third scenarios are respectively 0.040, 0.033 and 0.050.

کلیدواژه‌ها [English]

  • sustainability index
  • SWAT
  • MODFLOW
  • MT3DMS
  • MATLAB
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