scholarly journals Impact of dependence in river flow data on flood frequency analysis based on regression in quantile plots: Analysis and solutions

2011 ◽  
Vol 47 (12) ◽  
Author(s):  
E. R. Boniphace ◽  
P. Willems
Author(s):  
Simon Ricard ◽  
Alexis Bédard-Therrien ◽  
Annie-Claude ACP Parent ◽  
Brian Morse ◽  
François Anctil

A flood frequency analysis is conducted using instantaneous peak flow data over a hydrologic sub-region of southern Québec following three distinct methodological frameworks. First, the analysis is conducted locally using available instantaneous peak flow data. Second, the analysis is conducted locally using daily peak flow data processed in order to consider the peak flow effect. Third, a regional frequency analysis is conducted pooling all available instantaneous peak flow data over the study area. Results reveal a notable diversity in the resulting recurrence peak flow estimates and related uncertainties from one analysis to another. Expert judgement appears essential to arbitrate which alternative should be operated considering a specific context of application for flood plain delineation. Pros and cons for each approach are discussed. We finally encourage the use of a diversity of approaches in order to provide a robust assessment of uncertainty affecting peak flow estimates.


1992 ◽  
Vol 28 (9) ◽  
pp. 2375-2385 ◽  
Author(s):  
A. Allen Bradley ◽  
Kenneth W. Potter

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