Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5752204 | Journal of Hydrology: Regional Studies | 2017 | 23 Pages |
Abstract
The rigorous similarity criteria are useful for identification of catchments. Similarity in runoff response has the least identification power. For the PUB, a linear regression between index-flood and catchment area (R2Â =Â 0.95) performed superior to a power-law (R2Â =Â 0.80) and a linear regression between at-site quantiles and catchment area (e.g. R2Â =Â 0.88 for a 200Â year flood). There is considerable uncertainty in regional growth curves (e.g. â6.7% to â13.5% and +5.7% to +24.7% respectively for 95% lower and upper confidence limits (CL) for 2-1000 years return periods). The peaks of hourly AMS are 2-47% higher than that of the daily series. Quantile estimates from at-site flood frequency analysis (ASFFA) for some catchments are outside the 95% CL. Uncertainty estimation, sampling of flood events from instantaneous or high-resolution observations and comparative evaluation of RFFA with ASFFA are important.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth-Surface Processes
Authors
Teklu T. Hailegeorgis, Knut Alfredsen,