Abstract The ongoing Four Major Rivers Restoration Project will drastically change the river environment of South Korea. The objective of this study is to evaluate the impact of the Four Major Rivers Restoration Project on river flows using an unsteady flow simulation model. The computational model was applied to the stream reaches of the Han River and the Nakdong River. Historical floods were simulated for the changed river environment as well as for the current river condition to investigate the flood mitigation effect of the project. The simulation results show that once the project is completed, the flood water level of the entire reach of both rivers will fall because water level decline due to the channel dredging dominates water level rise due to the presence of weirs. This mitigation effect was particularly significant for the upstream region of the Nakdong River because of large-scale dredging. A steady flow simulation was carried out using normal flow discharges to investigate the effect of the project on flow characteristics during non-flood periods. For the Han River, the normal water level rises upstream of the weirs, whereas it falls downstream owing to the dominant dredging effect. However, in spite of heavy dredging, the water level decline in the case of the Nakdong River is very limited because the effect of dredging is overwhelmed by the high normal pool level of the weirs. The increase in flow travel time of the Nakdong River after the completion of the project will be more significant than that of the Han River.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    The Four Major Rivers Restoration Project: Impacts on river flows


    Contributors:

    Published in:

    Publication date :

    2011-01-28


    Size :

    8 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    The Four Major River Restoration Project in Korea - The Rivers for Green Growth

    Shim, Myung-Pil / Lee, Shang-Il / Kang, Boosik et al. | BASE | 2011

    Free access

    The Four Major River Restoration Project in Korea - The Rivers for Green Growth

    Shim, Myung-Pil / Lee, Shang-Il / Kang, Boosik et al. | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2011

    Free access

    Hydrolink 2011/6. Four Major River Restoration

    International Association for Hydro-Environment Engineering and Research (IAHR) | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2011

    Free access


    The Four Rivers Energy Project in Clean Coal V

    Tsao, T. / Holley, E. / Lewnard, J. et al. | British Library Conference Proceedings | 1994