Abstract
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.
| Original language | English |
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| Title of host publication | Balance and Uncertainty: Water in a Changing World: Proceedings of the 34th World Congress of the International Association for Hydro-Environment Research and Engineering: 33rd Hydrology and Water Resources Symposium and 10th Conference on Hydraulics in Water Engineering: 26 June to 1 July 2011, Brisbane Convention & Exhibition Centre, Brisbane, Australia |
| Publisher | Engineers Australia |
| Pages | 170-177 |
| Number of pages | 8 |
| ISBN (Print) | 9780858258686 |
| Publication status | Published - 2011 |
| Event | International Association for Hydro-Environment Research and Engineering. World Congress - Duration: 26 Jun 2011 → … |
Conference
| Conference | International Association for Hydro-Environment Research and Engineering. World Congress |
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| Period | 26/06/11 → … |
