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 : Towards a new regional flood frequency analysis method for tasmania
Towards a new regional flood frequency analysis method for tasmania
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This paper compares a number of regional flood frequency analysis (RFFA) methods for Tasmania using data from 53 catchments. The analysis uses a Bayesian generalised least squares (BGLS) regression approach in developing prediction equations for selected flood quantiles (Quantile Regression Technique QRT) or the first 3 moments of the LP3 distribution (Parameter Regression Technique PRT). In forming the regions two methods are used: in the fixed region approach all the 53 sites are assumed to form one region; in the region of influence (ROI) approach, a region is formed around each of the 53 sites based on the minimum model error variance. The developed prediction equations are validated using one-at-a-time cross validation. It has been found that ROI outperforms the fixed regions and that QRT-ROI and PRT-ROI methods perform very similarly. The findings from this study and other on-going studies will form the basis of recommendations for new RFFA methods in ARR for Tasmania.
File Size : 427,004 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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