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Benchmarking 2D hydraulic models for urban flooding

By N.M. Hunter, P.D. Bates, S. Neelz, G. Pender, I. Villanueva, N.G. Wright, D. Liang, R.A. Falconer, B. Lin, S. Waller, A.J. Crossley and D.C. Mason

Abstract

This paper describes benchmark testing of six two-dimensional (2D) hydraulic models (DIVAST, DIVASTTVD, TUFLOW, JFLOW, TRENT and LISFLOOD-FP) in terms of their ability to simulate surface flows in a densely urbanised area. The models are applied to a 1·0 km × 0·4 km urban catchment within the city of Glasgow, Scotland, UK, and are used to simulate a flood event that occurred at this site on 30 July 2002. An identical numerical grid describing the underlying topography is constructed for each model, using a combination of airborne laser altimetry (LiDAR) fused with digital map data, and used to run a benchmark simulation. Two numerical experiments were then conducted to test the response of each model to topographic error and uncertainty over friction parameterisation. While all the models tested produce plausible results, subtle differences between particular groups of codes give considerable insight into both the practice and science of urban hydraulic modelling. In particular, the results show that the terrain data available from modern LiDAR systems are sufficiently accurate and resolved for simulating urban flows, but such data need to be fused with digital map data of building topology and land use to gain maximum benefit from the information contained therein. When such terrain data are available, uncertainty in friction parameters becomes a more dominant factor than topographic error for typical problems. The simulations also show that flows in urban environments are characterised by numerous transitions to supercritical flow and numerical shocks. However, the effects of these are localised and they do not appear to affect overall wave propagation. In contrast, inertia terms are shown to be important in this particular case, but the specific characteristics of the test site may mean that this does not hold more generally

Topics: 500
Publisher: Thomas Telford
Year: 2008
DOI identifier: 10.1680/wama.2008.161.1.13
OAI identifier: oai:centaur.reading.ac.uk:1180

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Citations

  1. A simple raster-based model for floodplain inundation.
  2. (1986). A water quality simulation study of a natural harbour.
  3. Analysis and modelling of flooding in urban drainage systems.
  4. Applying a GISbased geomorphological routing model in urban catchments.
  5. (2002). Assessing the uncertainty in distributed model predictions using observed binary pattern information within GLUE. Hydrological Processes, doi
  6. (2000). Calibration of a two-dimensional finite element flood flow model using satellite radar imagery. Water Resources Research,
  7. (2006). Comment on ‘Analysis and modelling of flooding in urban drainage systems’.
  8. (2006). Comparison between TVD-MacCormack and ADI-type solvers of the shallow water equations.
  9. (1994). Distributed sensitivity analysis in modelling environmental systems.
  10. (2005). Drainage efficiency in urban areas: a case study. Hydrological Processes,
  11. (1991). Dynamically Linked Two-dimensional/Onedimensional Hydrodynamic Modelling Program for Rivers, Estuaries & Coastal Waters. MEngSc thesis,
  12. (2003). Estimation of flood inundation probabilities as conditioned on event inundation maps.
  13. Evaluation of 1-D and 2-D numerical models for predicting river flood inundation.
  14. (2003). Floodplain friction parameterization in two-dimensional river flood models using vegetation heights derived from airborne scanning laser altimetry. Hydrological Processes, doi
  15. (2006). Flux and source term discretization in two-dimensional shallow water models with porosity on unstructured grids.
  16. (1998). Internal and external validation of a two-dimensional finite element model for river flood simulation.
  17. Inundation simulation for urban drainage basin with storm sewer system.
  18. (1998). Investigating two-dimensional finite element predictions of floodplain inundation using fractal generated topography. Hydrological Processes, doi
  19. (1990). Large scale floodplain modelling.
  20. Modelling floods in a dense urban area using 2D shallow water equations.
  21. (2003). Numerical simulation of overbank processes in topographically complex floodplain environments. Hydrological Processes,
  22. Potential and limitations of 1D modelling of urban flooding.
  23. (2001). Shock-capturing Methods for Free-surface Shallow Flows.
  24. (2003). Simulation of the great flood of December 1870 in Rome.
  25. (1991). Terrain analysis for urban stormwater modelling. Hydrological Processes,
  26. Two-dimensional modeling of floods to map risk-prone areas.
  27. (2006). Urban fluvial flood modelling using a two-dimensional diffusion-wave treatment, part 1: mesh resolution effects. Hydrological Processes,
  28. (2006). Urban fluvial flood modelling using a two-dimensional diffusion-wave treatment, part 2: development of a sub-grid-scale treatment. Hydrological Processes,
  29. (2006). Using remotely sensed data to support flood modelling.

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