بررسی تأثیر تحلیل هیدرولیکی مبتنی بر فشار در قابلیت اطمینان کیفی شبکه‌های توزیع آب (از نظر کلر باقی‌مانده و ترِی‌هالومتان) با بهره‌گیری از نرم‌افزار EPANET-MSX

نوع مقاله : مقاله کامل پژوهشی

نویسندگان

دانشکده مهندسی عمران، دانشکدگان فنی، دانشگاه تهران

10.22034/ceej.2025.64179.2394

چکیده

ارزیابی عملکرد شبکه‌های توزیع آب بر اساس پارامترهای کیفی و رعایت مقدار کلر باقی‌مانده در گره‌های مصرف از اهمیت به‌سزایی برخوردار است. مدل‌های شبیه‌سازی مبتنی بر تقاضا در شرایط کمبود فشار، نتایجی به ­دور از واقعیت ارائه می‌دهند. از سوی دیگر، برای شبیه‌سازی کیفی آب، رویکرد تک‌گونه‌ای، ناکارآمد و تا حدودی غیرواقعی است؛ زیرا در شبکه‌های توزیع آب، مواد زیادی با هم تعامل دارند. در این مقاله، به‌منظور ارزیابی دقیق عملکرد شبکه از نظر پارامترهای کیفی کلر و تری­هالومتان در شرایط نرمال و کمبود فشار، مدل شبیه‌ساز کیفی چند‌گونه‌ای EPANET-MSX توسعه داده شده است. این برنامه توسعه ‌یافته که تحت عنوان نرم‌افزار EPANET-MSX-HDSM یاد شده است، قادر به شبیه‌سازی هیدرولیکی و کیفی شبکه به‌صورت توأمان و دینامیکی است و قابلیت استفاده در شرایط نرمال و کمبود فشار را دارد. مدل پیشنهادی بر روی دو شبکه توزیع از جمله شبکه توزیع آب شهر محلات مورد آزمایش قرار گرفته و با بهره‌گیری از منحنی‌های جریمه‌ای که برای کلر و ترِی‌هالومتان تعریف شده، قابلیت اطمینان شبکه از نظر این پارامترها بررسی شده است. بر اساس نتایج، استفاده از نرم‌افزار توسعه داده شده در شرایط وجود کمبود فشار می‌تواند به‌طور قابل ملاحظه‌ای نتایج قابلیت اطمینان کیفی شبکه را تحت تأثیر قرار دهد. چنان­که در شبکه نمونه اول، در سناریویی که در آن 64 درصد تقاضا تأمین می‌شود، کاهش 36 درصدی در قابلیت اطمینان کیفی تلفیقی و در شبکه نمونه دوم، در سناریوی تأمین 30 درصد تقاضا نسبت به سناریوی تأمین 90 درصد تقاضا، کاهش تقریبی 70 درصدی این شاخص مشاهده می‌شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigating the Effect of Pressure-Based Hydraulic Analysis on the Quality Reliability of Water Distribution Networks as for Residual Chlorine and THM using EPANET-MSX

نویسندگان [English]

  • Massoud Tabesh
  • Fatemeh Sajjadi
  • Niloufar Karimi
School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Iran
چکیده [English]

In recent decades, with the rapid growth of industries and population, environmental pollution, especially water resources, has increased greatly. One of the common methods to disinfect water and eliminate pathogenic microbes is chlorination. But this process, especially when the water contains naturally occurring organic matter (NOM), can lead to the production of dangerous byproducts such as trihalomethanes (THMs). These compounds, which have carcinogenic properties, can give an unpleasant taste and smell to water. To investigate and model these complex processes in water distribution systems, specialized software such as EPANET-MSX is used. which, based on the demand-based hydraulic analysis, enables simultaneous simulation of qualitative species interacting with each other. One of the important points in these studies is paying attention to water pressure in distribution networks. Pressure-based analysis helps researchers to better understand the actual performance of the network and provide appropriate solutions to improve water quality. In the present study, the undeniable role of HDSM (Head Depend Simulation Method) hydraulic analysis on the quality analysis results of the network was considered, and the EPANET-MSX multispecies qualitative analysis model is combined with the HDSM hydraulic analysis model. Also, in this study, based on the laws and criteria of drinking water quality standards, penalty curves are provided for the quality parameters of residual chlorine and trihalomethane, and based on that, the quality reliability of the network is checked in terms of these two important parameters.

کلیدواژه‌ها [English]

  • EPANET-MSX
  • Reliability
  • Residual chlorine
  • Trihalomethane
  • Water distribution network
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