期刊
JOURNAL OF FLOOD RISK MANAGEMENT
卷 11, 期 -, 页码 S717-S728出版社
WILEY
DOI: 10.1111/jfr3.12244
关键词
drainage; flood damages; urban drainage
资金
- FCT (Portuguese Foundation for Science and Technology) - POPH/FSE programme (Programa Operacional Potencial Humano/Fundo Social Europeu) [SFRH/BD/81869/2011]
- Portuguese Foundation for Science and Technology (FCT) [UID/MAR/04292/2013]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/81869/2011] Funding Source: FCT
- EPSRC [EP/K040995/1] Funding Source: UKRI
One of the main steps in assessing flood risk in urbanised areas is the quantification of damage costs. Damage is often estimated based on depth-damage curves for which depth maps are obtained (ideally) from coupled flood models. While the comparative analysis of flood damage models has been extensively researched in the literature, the influence of the underlying sewer network model has not been investigated. In this study, a 2D locally inertial equations flood risk analysis model (GWM) is coupled with two stormwater models (SWMM, tested with three different configurations, and SIPSON). The assessment of the network performance is made through the total exchanged volume between the surface and stormwater system, the surcharged conduits and manholes, maximum overland inundation and costs using a stepped version of the multi-coloured manual depth-damage curves for continuous urban fabric. The models behave similarly; however, they do show differences in the head pressures, number of surcharged manholes and maximum depth in some locations. The case study results show that despite the good agreement in damage between the four configurations (approximate to 6% maximum disagreement), some localised high differences in maximum depth observed [0.25 (m)] exist. It was also shown that SWMM needs to be calibrated in order to perform similarly to Preissmann slot models.
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