ارزیابی عملکرد سیستم های منابع آب با استفاده از معیارهای اطمینان‌پذیری، برگشتپذیری و آسیب پذیری فازی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار /دانشکده مهندسی عمران، دانشگاه صنعتی اصفهان، اصفهان

2 دانشجوی دکترای مهندسی/ عمران، دانشکده مهندسی عمران، دانشکده مهندسی عمران، دانشگاه صنعتی اصفهان، اصفهان

چکیده

مقاله حاضر ضمن تبیین لزوم بازنگری در روش‍های موجود جهت تخمین معیارهای عملکرد سیستم‍های منابع آب شامل اطمینان‍پذیری، برگشت‍پذیری و آسیب‍پذیری، روشی جدید جهت مرتفع‍کردن معایب و اشکالات روش‍های کمی‌کردن این معیارها در روش‍های کلاسیک ارائه می‍دهد. اطمینان‍پذیری، برگشت‍پذیری و آسیب‍پذیری معیارهای بسیار پرکاربردی در ارزیابی عملکرد سیستم‍های منابع آب می‍باشند که در سه دهه اخیر در بسیاری تحقیقات مورد استفاده قرار گرفته‍اند. مطالعه حاضر نشان می‍دهد که روش‍های متداول جهت کمی‍کردن این معیارها، در مقادیر حدی (آستانه) از مقادیر مطلوب پارامتر مورد مطالعه مانند تأمین نیاز آبی، دارای عملکرد غیرقابل اعتماد و غیر قابل درکی نسبت به واقعیت موجود هستند. این نقطه ضعف در روش‍های قبلی با استفاده از یک مثال ساده تئوریک نشان داده شده‍است که بیان می‍کند این نقطه ضعف می‍تواند موجب تغییر مقادیر قابل درک از اطمینان‍پذیری، برگشت‍پذیری و آسیب‍پذیری در ارزیابی عملکرد سیستم‍های منابع آب شود؛ همچنین تخمین نادرست این معیارها باعث محاسبه نادرست و غیرقابل قبول شاخص پایداری برای یک سیستم منابع آب می‍شود. مطالعه حاضر روشی را جهت بهبود تخمین سه معیار عملکرد مذکور برای ارزیابی عملکرد سیستم‍های منابع آب توسعه می‌دهد. روابط جدید با استفاده از  مفهوم توابع عضویت در تئوری فازی و برپایه روابط قبلی جهت بهبود عملکرد معیارها توسعه داده شده‍است. حوضه آبریز زاینده‍رود به عنوان مطالعه موردی این تحقیق جهت مقایسه و بررسی نتایج روش جدید نسبت به روش‍‍های قبلی مورد استفاده قرار گرفته‍است. مقایسه نتایج روش فازی و روش‍های کلاسیک و جمع‍بندی آن‍ها به وسیله شاخص پایداری نشان می‍دهد که روش ارائه‍شده در تحقیق حاضر ضمن رفع اشکال روش‍های قبلی، در ارزیابی عملکرد بسیار مؤثر و کارآمد می‍باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluating the Water Resource Systems Performance Using Fuzzy Reliability, Resilience and Vulnerability

نویسندگان [English]

  • H. R. Safavi 1
  • M. H. Gol Mohammadi 2
1 Associate Professor, Department of Civil Engineering, Isfahan University of Technology, Isfahan
2 PhD Candidate, Department of Civil Engineering, Isfahan University of Technology, Isfahan
چکیده [English]

This study highlights the need to improve the estimation of the water resources performance criteria such as reliability, resilience and vulnerability (RRV) regarding common approaches. The study also proposes a new technique to obviate disadvantages of common (classic) approaches. RRV criteria are very useful for evaluating performance of water resources system which are used in many researches in the last three decades. This study explains that common approaches of quantifying these estimators have unreliable performance in thresholds of desired values of parameters under investigation such as water supply. This weak point in previous approaches has been shown by an evident example, demonstrating that this problem could change exact values of reliability, resilience and vulnerability in evaluating the water resource system performance. This would also lead to incredible inaccuracy in evaluating the sustainability index of a water system. This study developed an approach to improve PRV performance criteria for water resource systems performance evaluation. The new relations are based on previous formulas with improvements in their structures using the concept of membership functions in fuzzy theory. The Zayandehrud basin has been used as a case study to compare and assess the new and previous approaches. Comparison of the results of the new proposed approach with those of the common approaches to estimate performance criteria as well as their summaries by sustainability index showed that the new approach is very effective and practical meanwhile eliminating disadvantages of common approach

کلیدواژه‌ها [English]

  • Water Resource System Performance Evaluation
  • Reliability
  • Resilience
  • vulnerability
  • Sustainability Index
  • Fuzzy Technique
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