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The Modified One-Dimensional Hydrodynamic Model Based on the Extended Chezy Formula

1
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China
2
College of Mechanics and Materials, Hohai University, Nanjing 210098, China
3
Nanjing Maritime Safety Administration, Nanjing 210009, China
*
Author to whom correspondence should be addressed.
Water 2018, 10(12), 1743; https://doi.org/10.3390/w10121743
Received: 17 October 2018 / Revised: 18 November 2018 / Accepted: 21 November 2018 / Published: 27 November 2018
(This article belongs to the Section Hydraulics)
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PDF [1954 KB, uploaded 27 November 2018]
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Abstract

Although steady uniform friction formulas have been introduced to the framework of a one-dimensional (1D) hydrodynamic model for centuries, the error of friction calculation inevitably undermines the performance of flood routing. Based on successful results of unsteady channel friction research studies, a newly proposed unsteady friction model is introduced to establish a modified 1D hydrodynamic model (namely, the modified SVN model). With the help of a carefully designed parameter calibration method, the performance of the modified SVN model was compared with that of the original SVN model in a simulation test for a hydraulic experiment. This study’s results revealed that compared with the original SVN model, the modified SVN model could achieve a better simulation in both the flow depth and the sectional averaged velocity simulations. Furthermore, it could reduce the peak value error and the time-at-peak error as well, indicating that the use of an unsteady friction model can efficiently improve the performance of a 1D hydrodynamic model. View Full-Text
Keywords: unsteady channel friction; 1D hydrodynamic model; flood routing; parameter calibration unsteady channel friction; 1D hydrodynamic model; flood routing; parameter calibration
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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 (CC BY 4.0).
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Zhou, J.; Bao, W.; Li, Y.; Cheng, L.; Bao, M. The Modified One-Dimensional Hydrodynamic Model Based on the Extended Chezy Formula. Water 2018, 10, 1743.

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