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Impact of Building Blocks on Inundation Level in Urban Drainage Area

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2013, 22(1), pp.99-107
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering

이정영 1,  Ha， Sungryong 1

1충북대학교

Accredited

ABSTRACT

This study is an impact assessment of building blocks on urban inundation depth and area. LiDAR data is used to generate two original data set in terms of DEM with 5×5 meter and building block elevation layer of the study drainage area in Cheongju and then the building block elevation layer is modified again to the mesh data with same size to DEM. Twodimensional inundation analysis is carried out by applying 2D SWMM model. The inundation depth calculated by using the building block elevation layer shows higher reliability than the DEM. This is resulted from the building block interference to surface flow. In addition, the maximum flooded area by DEM is two times wider than the area by building block layer. In the case of the surface velocity, the difference of velocity is negligible in either DEM or building block case in the low building impact zone. However, If the impact of building on the surface velocity was increase, the gap of velocity was significant.

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* References for papers published after 2023 are currently being built.

This paper was written with support from the National Research Foundation of Korea.
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