Reliability, Resiliency, Robustness, and Vulnerability Criteria for Water Resource Systems

Hashimoto, T., Loucks, D.P., & Stedinger, J.R. (1982). Reliability, Resiliency, Robustness, and Vulnerability Criteria for Water Resource Systems. IIASA Research Report (Reprint). IIASA, Laxenburg, Austria: RR-82-040. Reprinted from Water Resources Research, 18(1) [1982].

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Abstract

Three criteria for evaluating the possible performance of water resource systems are discussed. These measures describe how likely a system is to fail (reliability), how quickly it recovers from failure (resiliency), and how severe the consequences of failure may be (vulnerability). These criteria can be used to assist in the evaluation and selection of alternative design and operating policies for a wide variety of water resource projects. The performance of a water supply reservoir with a variety of operating policies illustrates their use.

When water resource investments are made there is little assurance that the predicted performance will coincide with the actual performance. Robustness is proposed as a measure of the likelihood that the actual cost of a proposed project will not exceed some fraction of the minimum possible cost of a system designed for the actual conditions that occur in the future. The robustness criterion is illustrated by its application to the planning of water supply systems in southwestern Sweden.

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