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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/37206

Title: A coupled hydrological and hydrodynamic model for flood simulation
Authors: Liu, Zhanyan
Zhang, Hongbin
Liang, Qiuhua
Keywords: Coupled hydrological and hydrodynamic model
Flood modelling
Godunov-type finite volume method
Hydrodynamic model
Unit hydrograph method
Water balance model
Issue Date: 2018
Publisher: © IWA Publishing
Citation: LIU, Z., ZHANG, H. and LIANG, Q., 2018. A coupled hydrological and hydrodynamic model for flood simulation. Hydrology Research, doi:10.2166/nh.2018.090.
Abstract: This paper presents a new flood modelling tool developed by coupling a full 2D hydrodynamic model with hydrological models. The coupled model overcomes the main limitations of the individual modelling approaches, i.e. high computational costs associated with the hydrodynamic models and less detailed representation of the underlying physical processes related to the hydrological models. When conducting a simulation using the coupled model, the computational domain (e.g. a catchment) is first divided into hydraulic and hydrological zones. In the hydrological zones that have high ground elevations and relatively homogeneous land cover or topographic features, a conceptual lumped model is applied to obtain runoff/net rainfall, which is then routed by a group of pre-acquired ‘unit hydrographs’ to the zone borders. These translated hydrographs will then be used to drive the full 2D hydrodynamic model to predict flood dynamics at high resolution in the hydraulic zones that are featured with complex topographic settings, including roads, buildings, etc. The new coupled flood model is applied to reproduce a major flood event that occurred in Morpeth, northeast England in September 2008. While producing similar results, the new coupled model is shown to be computationally much more efficient than the full hydrodynamic model.
Description: This paper is closed access until 13 December 2019.
Sponsor: The study is partly supported by the National Key R&D Program of China (2017YFC1502703, 2017YFC1502706).
Version: Accepted for publication
DOI: 10.2166/nh.2018.090
URI: https://dspace.lboro.ac.uk/2134/37206
Publisher Link: https://doi.org/10.2166/nh.2018.090
ISSN: 0029-1277
Appears in Collections:Closed Access (Architecture, Building and Civil Engineering)

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