Abstract




 
   

IJE TRANSACTIONS B: Applications Vol. 32, No. 5 (May 2019) 654-660   

PDF URL: http://www.ije.ir/Vol32/No5/B/5-3066.pdf  
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  EVALUATING SEISMIC EFFECTS ON A WATER SUPPLY NETWORK AND QUANTIFYING POST-EARTHQUAKE RECOVERY
 
R. R. Biswas
 
( Received: August 09, 2018 – Accepted in Revised Form: May 02, 2019 )
 
 

Abstract    This paper summarises the impact of major earthquakes, 2010–2011, on Christchurch’s water supply network and what recovery measures have been applied, what worked well, what did not and why. A number of issues related to the open nature of the Christchurch water supply network were identified during earthquakes. It was difficult to manage large water supply pressure zones during the post-earthquake emergency response due to multiple failures of assets. The performance of the post-earthquake, post-rebuild 2017 water supply network was compared with the pre-earthquake water supply network to investigate the success of the post-earthquake rebuild programme. A multi-million dollar repair and rebuild works helped to return the level of service of the network to the pre-earthquake level and the water leakage of the 2017 water supply network was found similar to the pre-earthquake level. Hydraulic model was used for immediate earthquake emergency response, what/if scenarios investigations and earthquake damage assessments. Hydraulic models were built for pre and post-earthquake water network of Christchurch. The performance of pre and post-earthquake hydraulic models were compared and the results are also reported in this paper. Hydraulic modelling was found to be a very powerful tool engineers can use to assess the impact of an earthquake on a water supply network and formulate alternative plans during emergency response.

 

Keywords    Earthquake Recovery; Evaluate Seismic Effects; Hydraulic Model; Water Supply; Infoworks WS

 

چکیده   

این مقاله خلاصه تاثیر زمین لرزه های عمده 2010-2011 را در شبکه آبرسانی کریستچرچ و اقدامات بهبودی را اعمال می‌کند، چه کار می‌کند، چه چیزی کار نمی‌کند و چرا. تعدادی از مسائل مربوط به ماهیت باز شبکه تامین آب کریستچرچ در طی زلزله شناسایی شد. در حین واکنش اضطراری پس از زلزله، به دلیل خرابی های متعدد دارایی، مدیریت مناطق بزرگ فشار آب را دشوار می‌نماید. عملکرد زلزله پس از زلزله، شبکۀ آبرسانی پس از بازسازی سال 2017 با شبکه تامین آب قبل از زلزله برای بررسی موفقیت برنامه بازسازی پس از زلزله مقایسه گردید. کارهای تعمیر و بازسازی چند میلیون دلاری به بازگشت سطح خدمات شبکه به سطح قبل از زلزله کمک کرد و نشت آب شبکه آبرسانی 2017 مشابه سطح پیش از زلزله بود. مدل هیدرولیکی برای پاسخ فوری زلزله فوری، تحقیقاتی که در مورد سناریوها و ارزیابی آسیب زلزله صورت گرفته است، استفاده شد. مدل‌های هیدرولیکی برای شبکه آبرسانی قبل و بعد از زمین لرزه کریستچرچ ساخته شد. عملکرد مدل‌های هیدرولیکی پیش از و پس از زلزله مقایسه شد و نتایج نیز در این مقاله گزارش شده است. مدل‌سازی هیدرولیکی به عنوان ابزار بسیار قدرتمندی بود که می‌توانست برای ارزیابی تاثیر زلزله بر روی یک شبکه تامین آب و برنامه‌های جایگزین در واکنش اضطراری استفاده گردد.

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