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 south-east Australia based on peaks-over-threshold (POT) model are …

Abstract Study region Southeast Australia Study focus Regional flood frequency analysis
(RFFA) is a widely adopted statistical method to estimate design floods in ungauged
catchments. Annual maximum flood (AMF) model is the most popular method in developing
RFFA techniques. However, the AMF-based approaches are criticised for its limitations in
the range of very frequent to frequent flood estimation. As an alternative, the peaks-over-
threshold (POT) based approach has shown theoretical advantages in this flood range. POT …