Technical note: comparison of methods for threshold selection for extreme sea levels
Technical note: comparison of methods for threshold selection for extreme sea levels.
Caballero-Megido, C.and Hillier, J. and Wyncoll, D. and Bosher, D. and Gouldby, B.P.
Journal of Flood Risk Management, Early view . (2018)
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|Abstract:||Extreme value analysis is an important tool for studying coastal flood risk, but requires the estimation of a threshold to define an ‘extreme’, which is traditionally undertaken visually. Such subjective judgement is not accurately reproducible, so recently a number of quantitative approaches have been proposed. This paper therefore reviews existing methods, illustrated with coastal tide-gauge data and the Generalized Pareto Distribution, and proposes a new automated method that mimics the enduringly popular visual inspection method. In total, five different types of statistical threshold selection and their variants are evaluated by comparison to manually derived thresholds, demonstrating that the new method is a useful, complementary tool.|
|Subjects:||Floods > General|
Coasts > General
|Deposited On:||29 Jan 2018 15:35|
|Last Modified:||06 Feb 2018 13:11|
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