Performance Analysis of Grid Resolution and Storm Sewage Network for Urban Flood Forecasting 


Vol. 39,  No. 1, pp. 70-81, Feb.  2024
10.14341/JKOSOS.2024.39.1.70


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  Abstract

With heavy rainfall due to extreme weather causing increasing damage, the importance of urban flood forecasting continues to grow. To forecast urban flooding accurately and promptly, a sewer network and surface grid with appropriate detail are necessary. However, for urban areas with complex storm sewer networks and terrain structures, high-resolution grids and detailed networks can significantly prolong the analysis. Therefore, determining an appropriate level of network simplification and a suitable surface grid resolution is essential to secure the golden time for urban flood forecasting. In this study, InfoWorks ICM, a software program capable of 1D–2D coupled simulation, was used to examine urban flood forecasting performance for storm sewer networks with various levels of simplification and different surface grid resolutions. The inundation depth, inundation area, and simulation time were analyzed for each simplification level. Based on the analysis, the simulation time was reduced by up to 65% upon simplifying the storm sewer networks and by up to 96% depending on the surface grid resolution; further, the inundation area was overestimated as the grid resolution increased. This study provides insights into optimizing the simplification level and surface grid resolution for storm sewer networks to ensure efficient and accurate urban flood forecasting.

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  Cite this article

[IEEE Style]

심상보 and 김형준, "Performance Analysis of Grid Resolution and Storm Sewage Network for Urban Flood Forecasting," Journal of the Korean Society of Safety, vol. 39, no. 1, pp. 70-81, 2024. DOI: 10.14341/JKOSOS.2024.39.1.70.

[ACM Style]

심상보 and 김형준. 2024. Performance Analysis of Grid Resolution and Storm Sewage Network for Urban Flood Forecasting. Journal of the Korean Society of Safety, 39, 1, (2024), 70-81. DOI: 10.14341/JKOSOS.2024.39.1.70.

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