Xing2018_Article_City-scaleHydrodynamicModellin.pdf (8.86 MB)
Download fileCity-scale hydrodynamic modelling of urban flash floods: the issues of scale and resolution
journal contribution
posted on 2019-01-14, 11:37 authored by Yun Xing, Qiuhua LiangQiuhua Liang, Gang Wang, Xiaodong Ming, Xilin XiaHydrodynamic models have been widely used in urban flood modelling. Due to the prohibitive computational cost, most of urban flood simulations have been currently carried out at low spatial resolution or in small localised domains, leading to unreliable predictions. With the recent advance in high-performance computing technologies, GPU-accelerated hydrodynamic models are now capable of performing high-resolution simulations at a city scale. This paper presents a multi-GPU hydrodynamic model applied to reproduce a flood event in a 267.4 km2 urbanised domain in Fuzhou, Fujian Province, China. At 2 m resolution, the simulation is completed in nearly real time, demonstrating the efficiency and robustness of the model for high-resolution flood modelling. The model is used to further investigate the effects of varying spatial resolution and using localised domains on the simulation results. It is recommended that urban flood simulations should be performed at resolutions higher than 5 m and localised simulations may introduce unacceptable numerical errors.
Funding
This work is funded by the China State Major Project of Water Pollution Control and Management (Grant No. 2017ZX07603-001), the UK NERC funded Flood-PREPARED project (Grant No. NE/P017134/1) and the Science and Technology Plan Project of Zhejiang Province, China (Grant No. 2017F30013).
History
School
- Architecture, Building and Civil Engineering
Published in
Natural HazardsCitation
XING, Y. ... et al, 2018. City-scale hydrodynamic modelling of urban flash floods: the issues of scale and resolution. Natural Hazards, 96 (1), pp.473–496.Publisher
Springer © The authorsVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/ by/4.0/Acceptance date
2018-12-05Publication date
2018Notes
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.ISSN
0921-030XeISSN
1573-0840Publisher version
Language
- en