Regional flood frequency analysis based on peaks-over-threshold model : a case study for south-east Australia

Xiao Pan, Ataur Rahman

Research output: Chapter in Book / Conference PaperConference Paperpeer-review

Abstract

![CDATA[Regional flood frequency analysis (RFFA) is widely applied in hydrology to estimate flood quantiles for ungauged catchments. Most of these RFFA techniques are developed using flood quantiles estimated by annual maximum (AM) model. Recently, a RFFA technique has been recommended in Australian Rainfall and Runoff (ARR) based on the AM model, which does not include very frequent floods. In this study, at-site flood quantile estimates from 67 gauged catchments in southeast Australia based on peaks-over-threshold (POT) model are used to develop a RFFA technique for ‘very frequent’ and ‘frequent’ flood ranges. Very frequent design rainfall and baseflow index data from ARR are used as independent variables in this new RFFA. Based on an independent validation, it is found that the new POT based RFFA models can provide quite accurate flood quantile estimates for ungauged catchments in the very frequent and frequent flood range. These frequent design flood estimates can be used in urban stormwater management, environmental and ecological studies in the study area.]]
Original languageEnglish
Title of host publicationProceedings of the World Environmental and Water Resources Congress 2022, Adaptive Planning and Design in an Age of Risk and Uncertainty, Selected Papers from the World Environmental and Water Resources Congress 2022, June 5-8, 2022, Atlanta, Georgia
PublisherAmerican Society of Civil Engineers
Pages422-429
Number of pages8
ISBN (Print)9780784484258
DOIs
Publication statusPublished - 2022
EventWorld Environmental and Water Resources Congress -
Duration: 5 Jun 2022 → …

Conference

ConferenceWorld Environmental and Water Resources Congress
Period5/06/22 → …

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