Pipelines 2020
Resilience of Sewer Networks to Extreme Weather Hazards: Past Experiences and an Assessment Framework
Publication: Pipelines 2020
ABSTRACT
With the rise in the intensity and frequency of extreme weather events, short- and long-term planning have become more necessary to enhance the capability of sanitary and combined sewer networks to cope with potential disruptions in their serviceability. Based on the previous reports and observations, separation of pipe joints, leaks, breaks, and collapses are among the most frequent failures in buried wastewater and storm water pipelines. Moreover, many cities experienced uprooting trees as a result of high winds during hurricanes and tornadoes, which caused damage to shallow buried sewer pipes. Besides the immediate consequences, extreme weather events may have long-term impacts such as formation of voids around the pipes, exacerbation of the structural integrity of corroded pipes, and acceleration of the degradation of pipes. These immediate and long-term consequences can lead to severe environmental issues, health problems, and economic losses. These consequences as well as critical factors such as aging, deterioration, and population growth highlight the need for enhancing the resilience of these infrastructure systems. In this study, a brief review of several case studies related to the resilience of existing and future sewer pipe networks is presented. Subsequently, a resilience assessment framework is proposed that consists of four models: (1) hazard models; (2) component and system fragility models; (3) response models; and (4) restoration models. This comprehensive framework can be used to analyze and enhance the resilience of sewer pipe networks in the face of extreme weather events.
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Information & Authors
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Published In
Pipelines 2020
Pages: 50 - 59
Editors: J. Felipe Pulido, OBG, Part of Ramboll and Mark Poppe, Brown and Caldwell
ISBN (Online): 978-0-7844-8321-3
Copyright
© 2020 American Society of Civil Engineers.
History
Published online: Aug 6, 2020
Published in print: Aug 6, 2020
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