07 May 2024
 | 07 May 2024
Status: this preprint is open for discussion.

Influence of building collapse on pluvial and fluvial flood inundation of metro stations in central Shanghai

Zhi Li, Hanqi Li, Zhibo Zhang, Chaomeng Dai, and Simin Jiang

Abstract. Urban flooding poses a significant threat to vulnerable underground infrastructure systems, such as metro stations. Building collapses induced by earthquakes alters urban building layout and coverage, consequently influencing flood inundation and propagation patterns. This study employs GPU-accelerated hydrodynamic simulation to investigate the mechanisms by which building collapse affects subsequent pluvial or fluvial flooding in the Huangpu district of Shanghai. Massive building collapse layouts are randomly generated, on which hydrodynamic simulations are performed and the inundation process of the metro stations are analyzed. The results reveal that pluvial floods are strongly influenced by localized topography distributed across the city. Consequently, building collapse has a more substantial impact on pluvial flooding when more buildings are collapsed. In contrast, fluvial floods are sensitive to the source location (e.g., location of levee breach) and the long travel route. Building collapse can either positively or negatively influence fluvial flooding by constricting or blocking the flow path. This work highlights the complex mechanism of earthquake-flood multi-hazard processes, emphasizing the importance of performing local-to-local analysis when both the hazard (e.g., individual building collapse, fluvial flood) and the hazard-bearing body (e.g., metro station) are localized. To better serve urban disaster prevention and mitigation, more efforts should be directed on developing physics-based high-resolution urban earthquake-flood simulation methods, as well as on acquiring data to drive such simulations.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Zhi Li, Hanqi Li, Zhibo Zhang, Chaomeng Dai, and Simin Jiang

Status: open (until 18 Jun 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
Zhi Li, Hanqi Li, Zhibo Zhang, Chaomeng Dai, and Simin Jiang
Zhi Li, Hanqi Li, Zhibo Zhang, Chaomeng Dai, and Simin Jiang


Total article views: 124 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
94 26 4 124 2 3
  • HTML: 94
  • PDF: 26
  • XML: 4
  • Total: 124
  • BibTeX: 2
  • EndNote: 3
Views and downloads (calculated since 07 May 2024)
Cumulative views and downloads (calculated since 07 May 2024)

Viewed (geographical distribution)

Total article views: 130 (including HTML, PDF, and XML) Thereof 130 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
Latest update: 19 May 2024
Short summary
This study used advanced computer simulations to investigate how earthquake-induced building collapse affects flooding of the metro stations in Shanghai. Results show that the influence of building collapse on rainfall-driven and river-driven flood are different because these two types of floods have different origination and propagation mechanisms.