IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 1: Extremes and Variability : Has there been a change in rainfall maxima? implications for design rainfalls
Has there been a change in rainfall maxima? implications for design rainfalls
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The majority of studies that have considered stationarity of daily rainfall totals have concentrated on central tendency statistics such as mean or median values. However, for derivation of design rainfalls using regional frequency analyses, it is the stationarity of the rainfalls in the upper tail of the distribution such as annual maxima that are of interest. The impact of record length and timing on rare rainfall estimates has been investigated using rainfall data from New South Wales, the Australian Capital Territory and surrounding areas of the neighbouring states of Queensland, Victoria and South Australia. Where statistically significant break points were identified, quantiles were derived for each of the data sets defined by the break point. No consistent differences in the quantile estimates were identified from this process and so the time series appear to be stationarity for the purposes of analysing the rainfall totals in the upper tail of the distribution. Therefore the full instrumental record can be used in regional frequency analysis, without adjustment for non-stationarity effects, to estimate design rainfall.
File Size : 312,590 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 1: Extremes and Variability
Date Published : 07/08/2012
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