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Discharge prediction using hydraulic characteristics of mean velocity equation

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Abstract

Discharge is an important factor in river design for water utilization, water control and hydraulic structures; therefore, an accurate estimation of the discharge is required. At present, a rating curve depicting the relationship between a stage and discharge is used to calculate the discharge from river systems. Although the rating curve has an advantage in that it can predict and use the discharge during the flood season in which the measurement is difficult, there is room for improvement as it does not reflect the hydraulic characteristics of rivers. Therefore, in this study, discharge was predicted using the convenient calculation method with empirical mediating variables of the Manning and Chezy equations which were proposed by the author’s previous research as a new methodology for estimating discharge in an open channel. This was proven, based on the data measured in a meandering open channel system in a lab at the Mississippi River in the US and at the Columbia Del Dique Canal, and an accuracy level at a coefficient of 0.8 was demonstrated. Thus, this method, which reflects the hydraulic characteristics and predicts the discharge in a simple manner, is expected to be convenient in practice.

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Acknowledgments

This research was supported by a grant (11-TI-C06) from Construction Technology Innovation Program funded by Ministry of Land, Transport and Maritime Affairs of Korean government.

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Authors and Affiliations

  1. Pusan National University, San-30 Jangjeon-dong, Geumjeong-gu, Busan, 609-735, Korea

    Tai Ho Choo & Hyeon Cheol Yoon

  2. Department of Environmental Health and Safety, Eulji University, Yangji-dong, Sujeong-gu, Seongnam-si, Gyeonggi-do, 461-713, Korea

    Soo Kwon Chae

  3. Yeongnam University, Dae-dong, Gyeongsan-si, Gyeongbuk, 712-749, Korea

    Yeon Moon Choo

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  1. Tai Ho Choo
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  2. Soo Kwon Chae
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  3. Hyeon Cheol Yoon
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Correspondence to Soo Kwon Chae.

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Choo, T.H., Chae, S.K., Yoon, H.C. et al. Discharge prediction using hydraulic characteristics of mean velocity equation. Environ Earth Sci 71, 675–683 (2014). https://doi.org/10.1007/s12665-013-2468-y

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  • DOI: https://doi.org/10.1007/s12665-013-2468-y

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