Water System Reliability?Balance of Cost and Risk

by John P. Velon, Harza Engineering Co, Chicago, IL, USA,

Document Type: Proceeding Paper

Part of: Water Forum '86: World Water Issues in Evolution


Reliability of water distribution systems to perform adequately during stress situations is dependent both on operation/maintenance preparedness as well as the limitations of the physical network. A distribution network, which may reliably provide a good level of service during a period of peak demands, may be vulnerable to situations when components of the system (mains, pumps, etc) are inoperable. Such situations are often overlooked in network design. The paper presents a procedure for identifying the vulnerability of networks to such situations, quantifying the costs of improvements, and evaluating the risks of not making the improvements.

Subject Headings: Water supply systems | System reliability | Risk management | Benefit cost ratios | Emergency management | Disaster preparedness | Systems management

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