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Selecting the best probability distribution for at-site flood frequency analysis; a study of Torne River
Stockholm University, Faculty of Social Sciences, Department of Statistics.ORCID iD: 0000-0003-2889-0263
Number of Authors: 32019 (English)In: SN Applied Sciences, ISSN 2523-3963, Vol. 1, no 12, article id 1629Article in journal (Refereed) Published
Abstract [en]

At-site flood frequency analysis is a direct method of estimation of flood frequency at a particular site. The appropriate selection of probability distribution and a parameter estimation method are important for at-site flood frequency analysis. Generalized extreme value, three-parameter log-normal, generalized logistic, Pearson type-III and Gumbel distributions have been considered to describe the annual maximum steam flow at five gauging sites of Torne River in Sweden. To estimate the parameters of distributions, maximum likelihood estimation and L-moments methods are used. The performance of these distributions is assessed based on goodness-of-fit tests and accuracy measures. At most sites, the best-fitted distributions are with LM estimation method. Finally, the most suitable distribution at each site is used to predict the maximum flood magnitude for different return periods.

Place, publisher, year, edition, pages
2019. Vol. 1, no 12, article id 1629
Keywords [en]
Flood frequency analysis, L-moments, Maximum likelihood estimation
National Category
Other Natural Sciences Probability Theory and Statistics
Identifiers
URN: urn:nbn:se:su:diva-177608DOI: 10.1007/s42452-019-1584-zISI: 000502039800003OAI: oai:DiVA.org:su-177608DiVA, id: diva2:1384977
Available from: 2020-01-13 Created: 2020-01-13 Last updated: 2020-02-06Bibliographically approved

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