Abstract Overtopping occurs when the flood water’s level is greater than the levee’s height. Mapping risk of levee overtopping is efficient for assessing levee stability, generating flood hazard maps and planning flooding management. This paper proposes a methodology for mapping the risk of levee overtopping using the topographic Light Detection and Ranging (LiDAR) data taken in Nakdong River Basins, South Korea. The procedure is as follows: A slope map is generated from the LiDAR data, then the levee crown polygons and the riverside levee boundaries are extracted from the slope map by using the levee crown detection method. The levee crown segments with the risk of overtopping are identified using the values of the average height of the levee crown polygon, the designed flood level, and the freeboard. Next, different-colored levee boundaries are generated to show the risk of overtopping on each levee crown segment. Finally, the areas with the height lower than the designed flood level are shown on the levee crown surfaces as the red points. In this research, the risk of overtopping on the two levees (Jungsan Levee and Daesan Levee) parallel to the Nakdong River’s mainstream are assessed by using the proposed methodology. This research shows that Jungsan Levee do not have the risk of overtopping, while Daesan Levee has the risk of overtopping.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Mapping risk of levee overtopping using LiDAR data: A case study in Nakdong River Basins, South Korea


    Contributors:

    Published in:

    Publication date :

    2015-01-20


    Size :

    7 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    River levee overtopping – the part of floodplain risk analysis

    Riha, Jaromir / Golik, Pavel | BASE | 2004

    Free access

    River levee overtopping – the part of floodplain risk analysis

    Riha, Jaromir / Golik, Pavel | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2004

    Free access

    Experimental Modeling of Levee Failure Process due to Overtopping

    Tabrizi, A. / Elelfy, E. / Larocque, L. et al. | British Library Conference Proceedings | 2015


    Simplified physically-based modelling of overtopping induced levee breaching with TELEMAC-2D

    Kheloui, Lydia / El Kadi Abderrezzak, Kamal / Bourban, Sébastien | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2021

    Free access