Flood Routing via Kinematic Wave Theory based on GIS (Case Study: Ghareh-Chay River)

Document Type : Original Article

Authors

1 Water Resources Management and Engineering Graduated, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran

2 Department of Civil Engineering, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran

3 Department of Geology, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran

Abstract

The purpose of the present study was to determine the flood Routing kinematics of the Ghareh-chay River that is done in the MATLAB programming environment. by providing the required data, the flood flow routing modeling of each station was performed by the kinematic wave method in the Ghareh-chay River basin. The results of physical characteristics of the river indicated that the study area had low slope and roughness coefficient and high soil curve number. In order to improve the kinematic wave routing, modeling was performed with input hydrograph as the initial condition and considering zero value for all zero-second discharges as the boundary condition. The obtained graphs show the conformity of the modeling performed with the observed data. Nash–Sutcliffe (NS), Coefficient of Determination (R2) and Normal Root Mean Square Error (NRMSE) indices were used to evaluate the model capability. In the results of the model performance evaluation for the Hydrometric Azna, Bazaneh, Toure and Pole Doab with the high value of Nash coefficient and Coefficient of Determination and the low error value of NRMS indicate that the model The kinematic wave has been successful in simulating flood flow and has good accuracy. and it was determined that the results of the present model can be generalized to basins with this type of shape.

Keywords

References

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Iranian Journal of Irrigation & Drainage
Volume 15, Issue 1 - Serial Number 85
March and April 2021
Pages 151-163

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