Flood resilience assessment of metro station entrances based on the PSR model framework: A case study of the Donghaochong Basin, Guangzhou.
J Environ Manage
; 366: 121922, 2024 Aug.
Article
en En
| MEDLINE
| ID: mdl-39033619
ABSTRACT
Increasingly frequent intense rainfall events have caused flood disasters of metro systems worldwide. Flood management based on flood resilience is a novel strategy for dealing with floods. Nevertheless, limited research has been conducted on the correlation between metro systems and flood resilience. In this study, an index system-based framework is proposed to evaluate the flood resilience of metro station entrances, the selected indices are multidimensional, emcompassing external environment, entrance structure, socio-economic, and post-disaster response factors. The flood resilience assessment of metro station entrances is carried out via a case study of the Donghaochong Basin, Guangzhou, China. The pressure-state-response (PSR) model is used to establish the index system for the assessment of the flood resilience. Indices of inundation at the entrance sites are simulated and extracted using the InfoWorks ICM model. Two rainfall scenarios are chosen to simulate inundation, and the resilience results of metro station entrances in each scenario are compared. The results suggest that in the 200-year (200a) return period scenario, 70% of the entrances are at the high and highest resilience levels, whereas in the Zhengzhou "720" scenario, the proportion of that is 43.33%. The resilience of metro station entrances is significantly reduced under the higher rainfall scenario. However, factors unrelated to rainfall are found to mitigate the extent to which total resilience is reduced. Before and during a flood disaster, the indices indicate the resistance and adaptability of metro entrances to the disaster. After a flood disaster, they indicate the ability of entrances to recover to regular functioning. Specific steps should be implemented before and after a disaster to effectively enhance the flood resilience of metro entrances. This study provides valuable insights into enhancing the pertinence and effectiveness of flood disaster management at metro station entrances, and reducing flood damage to metro systems.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Inundaciones
País/Región como asunto:
Asia
Idioma:
En
Revista:
J Environ Manage
Año:
2024
Tipo del documento:
Article
País de afiliación:
China
Pais de publicación:
Reino Unido