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gfdl on-line bibliography > 2005 citations
An analysis of region-of-influence methods for flood regionalization in the Gulf-Atlantic rolling plains
| Eng, K., G. D. Tasker, and P. C. D. Milly, 2005: An analysis of region-of-influence methods for flood regionalization in the Gulf-Atlantic rolling plains. Journal of the American Water Resources Association, 41(1), 135-143. |
| Abstract: Region-of-influence (RoI) approaches for estimating streamflow characteristics at ungaged sites were applied and evaluated in a case study of the 50-year peak discharge in the Gulf-Atlantic Rolling Plains of the southeastern United States. Linear regression against basin characteristics was performed for each ungaged site considered based on data from a region of influence containing the closest gages in predictor variable (PRoI) or geographic (GRoI) space. Augmentation of this count based cutoff by a distance based cutoff also was considered. Prediction errors were evaluated for an independent (split-sampled) dataset. For the dataset and metrics considered here: (1) for either PRoI or GRoI, optimal results were found when the simpler count based cutoff, rather than the distance augmented cutoff, was used; (2) GRoI produced lower error than PRoI when applied indiscriminately over the entire study region; (3) PRoI performance improved considerably when RoI was restricted to predefined geographic subregions. |