Water Science and Engineering 2012, 5(3) 243-258 DOI:   10.3882/j.issn.1674-2370.2012.03.001  ISSN: 1674-2370 CN: 32-1785/TV

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Keywords
open channel flow
flood wave
dynamic wave model
flood routing
numerical experiments
sensitivity analysis
Authors
REZA -Barati
SAJJAD -Rahimi
GHOLAM HOSSEIN -Akbari
PubMed
Article by Reza,.B
Article by Sajjad,.R
Article by Gholam Hossein,.A

Analysis of dynamic wave model for flood routing in natural rivers

Reza BARATI*1, Sajjad RAHIMI2, Gholam Hossein AKBARI3

1. Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran
2. Social Development and Health Promotion Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
3. Department of Civil Engineering, University of Sistan and Baluchestan, Zahedan, Iran

Abstract

 Flooding is a common natural disaster that causes enormous economic, social, and human losses. Of various flood routing methods, the dynamic wave model is one of the best approaches for the prediction of the characteristics of floods during their propagations in natural rivers because all of the terms of the momentum equation are considered in the model. However, no significant research has been conducted on how the model sensitivity affects the accuracy of the downstream hydrograph. In this study, a comprehensive analysis of the input parameters of the dynamic wave model was performed through field applications in natural rivers and routing experiments in artificial channels using the graphical multi-parametric sensitivity analysis (GMPSA). The results indicate that the effects of input parameter errors on the output results are more significant in special situations, such as lower values of Manning’s roughness coefficient and/or a steeper bed slope on the characteristics of a design hydrograph, larger values of the skewness factor and/or time to peak on the channel characteristics, larger values of Manning’s roughness coefficient and/or the bed slope on the space step, and lower values of Manning’s roughness coefficient and/or a steeper bed slope on the time step and weighting factor.

Keywords open channel flow   flood wave   dynamic wave model   flood routing   numerical experiments   sensitivity analysis  
Received 2012-04-16 Revised 2012-07-08 Online: 2012-09-25 
DOI: 10.3882/j.issn.1674-2370.2012.03.001
Fund:
Corresponding Authors: Reza BARATI
Email: r88barati@gmail.com; reza.barati@modares.ac.ir
About author:

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