Project: Advanced hydraulic modelling for flood risk analysis
Supervisors: Dr Jun Zang and Dr Thomas Kjeldsen
One expected consequence of climate change is an increase in the frequency and magnitude of flooding. Flash floods are of particular interest as they are a destructive natural hazard with one of the highest mortalities. Across the industry, their modelling is incorporated through the use of different hydrodynamic models but regardless of the models’ complexity, approximations are made which lead to inaccurate model predictions. The main problems presented are the numerical instabilities present in high-resolution grids, the computational time and finally the modelling of the moving wet-dry interface. Furthermore, an ideal and efficient hydrodynamic model would be calibrated against different magnitude events and would accurately predict large magnitude events such as flash floods. But in reality, model performance is not consistent across event magnitudes. All of the previously mentioned remain challenging limitations raising the need for advanced models. The objective of this study is therefore, using an existing high-resolution nonlinear shallow flow model with a dynamically adaptive cut-cell quadtree grid, to develop a verified and efficient 2D hydraulic model being able to accurately predict flood inundation extents in extreme events and compare it with existing industry models to assess its predictive ability.
Ioanna Stamataki is a PhD student in the Civil Engineering Department of the University of Bath and is part of the WISE CDT and the WEIR and WIRC Research Groups. She received her Civil Engineering degree (MEng Civil Engineering) from the University of Bath, in 2014, and during her degree, she completed a dissertation on a hydraulics based project involving the study of flow over complex weirs such as Pulteney Weir in Bath. In 2014 Ioanna delivered and published her first conference paper entitled “Study of flow over weirs such as Pulteney Weir” at the 11th ICHE conference in Hamburg.
A summer placement with Edenvale Young Associates who specialise in the fluvial and maritime environment ensured her interest in hydraulics and modelling. The work included hydraulic modelling projects, design of river protection works, flood forecasting schemes, flooding probability and flood risk assessments.
Her main research interests are the analysis and modelling of flash floods through laboratory experiments and CFD modelling.
Keywords: Hydraulic modelling, Flash floods, Flood risk analysis, Adaptive cut-cell quadtree grid