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http://dx.doi.org/10.5762/KAIS.2012.13.11.5578

A Study on the Prediction of Discharge by Estimating Optimum Parameter of Mean Velocity Equation  

Choo, Tai Ho (Division of Civil Environmental Engineering, Pusan National University)
Chae, Soo Kwon (Division of Environmental Health and Safety, Eulji University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.13, no.11, 2012 , pp. 5578-5586 More about this Journal
Abstract
The accurate estimation of discharge is very essential as the important factor of river design for the utilization and flood control, hydraulic construction design. The present discharge production is using the stage-discharge relationship curve in the river. The rating curve uses the method by predicting the discharge based on regression analysis using the measured stage and discharge data in a flood season. The method is comparatively convenient and has especially advantages in that it can predict the discharge having the difficulty of observation in a flood season. However, this method has basically room for improvement because the method only uses the relationship between stage and discharge, and doesn't reflect the hydraulic parameters such as hydraulic radius, energy slope, roughness, topography, etc.. Therefore, in this study, discharge was predicted using the convenient calculation method with empirical parameters of the Manning and Chezy equations, which were proposed by Choo et at (2011) in KSCE as a new methodology for estimating discharge in open channel. The proposed method can conveniently estimate empirical parameters in both of Manning and Chezy equations and the discharge is estimated in the open channels. There are proved by using data measured in meandering lab. channel and India canal and the accuracies show about determination coefficient 0.8. Accordingly, this method will be used in actual field if this study is continuously conducted.
Keywords
representative roughness coefficient n; representative Chezy coefficient C; rating curve; mean velocity equation; optimum parameter;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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