Version 1
: Received: 24 October 2017 / Approved: 24 October 2017 / Online: 24 October 2017 (11:22:37 CEST)
How to cite:
Seong, K. A Practical Approach Deriving Optimal Unit Hydrograph from Noisy Runoff in absence of Rainfall Data. Preprints2017, 2017100158. https://doi.org/10.20944/preprints201710.0158.v1
Seong, K. A Practical Approach Deriving Optimal Unit Hydrograph from Noisy Runoff in absence of Rainfall Data. Preprints 2017, 2017100158. https://doi.org/10.20944/preprints201710.0158.v1
Seong, K. A Practical Approach Deriving Optimal Unit Hydrograph from Noisy Runoff in absence of Rainfall Data. Preprints2017, 2017100158. https://doi.org/10.20944/preprints201710.0158.v1
APA Style
Seong, K. (2017). A Practical Approach Deriving Optimal Unit Hydrograph from Noisy Runoff in absence of Rainfall Data. Preprints. https://doi.org/10.20944/preprints201710.0158.v1
Chicago/Turabian Style
Seong, K. 2017 "A Practical Approach Deriving Optimal Unit Hydrograph from Noisy Runoff in absence of Rainfall Data" Preprints. https://doi.org/10.20944/preprints201710.0158.v1
Abstract
As a procedure deriving UH (unit hydrograph), the root selection method necessitates only storm runoff data. However, this method must deal with the uncertainty related to the noise fluctuation of runoff ordinates and derive one optimal UH from many storms. This study proposes a procedure that applies the Savitzky-Golay filter to smooth the noise fluctuation of the runoff ordinates and uses the linear combination of UHs from individual storms to derive an optimal UH. The proposed method is applied to the storms of the Nenagh River basin in Ireland. The applicability of the Savitzky-Golay filter for smoothing the noise fluctuation of storm runoffs is examined by means of the Nash-Sutcliffe efficiency index. Furthermore, the root selection method is extended to also estimate IUHs. The results show that the adoption of the Savitzky-Golay filter improves the applicability of the root selection method and that the optimal UH predicts accurately the time-to-peak and peak discharge.
Keywords
root selection method; unit hydrograph; Savitzky-Golay filter; Nash-Sutcliffe index
Subject
Engineering, Civil Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
