An analysis of region-of-influence methods for flood regionalization in the Gulf-Atlantic Rolling Plains
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Abstract
Region-of-influence (RoI) approaches for estimating stream flow 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 n 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 Rol was restricted to predefined geographic subregions.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | An analysis of region-of-influence methods for flood regionalization in the Gulf-Atlantic Rolling Plains |
| Series title | Journal of the American Water Resources Association |
| DOI | 10.1111/j.1752-1688.2005.tb03723.x |
| Volume | 41 |
| Issue | 1 |
| Year Published | 2005 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | National Research Program - Eastern Branch |
| Description | 9 p. |
| First page | 135 |
| Last page | 143 |
| Google Analytic Metrics | Metrics page |