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A reliability-based selective index for regional flood frequency analysis methods

✍ Scribed by Gwo-Fong Lin; Lu-Hsien Chen

Publisher: John Wiley and Sons
Year: 2003
Tongue: English
Weight: 138 KB
Volume: 17
Category: Article
ISSN: 0885-6087
DOI: 10.1002/hyp.1267

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✦ Synopsis

Abstract

In this paper, a new index is proposed for the selection of the best regional frequency analysis method. First, based on the theory of reliability, the new selective index is developed. The variances of three regional T‐year event estimators are then derived. The proposed methodology is applied to an actual watershed. For each regional method, the reliability of various T‐year regional estimates is computed. Finally, the reliability‐based selective index graph is constructed from which the best regional method can be determined. In addition, the selection result is compared with that based on the traditional index, root mean square error. The proposed new index is recommended as an alternative to the existing indices such as root mean square error, because the influence of uncertainty and the accuracy of estimates are considered. Copyright © 2003 John Wiley & Sons, Ltd.

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