Comparative analysis of building exposure using static and dynamic flood hazard approaches

The effective management of flood risk is dependent upon the accurate assessment of hazard and exposure, in order to support disaster preparedness and mitigation strategies. This study evaluates changes in building exposure estimates by comparing static and dynamic flood hazard analysis methods. Static approaches assume uniform flood conditions across basins, whilst dynamic hazard models incorporate the spatial variability of flood magnitudes, providing a more comprehensive representation of flood risks.

Utilising building inventory datasets, this research examines exposure under different flood scenarios and return periods. The findings reveal substantial variations in building exposure when employing dynamic hazard models, particularly in basins characterised by spatially variable hydro-meteorological conditions. The study highlights the implications of these differences for flood risk management practice and demonstrates the limitations of static hazard models in large-scale flood risk assessments.

The study makes a significant contribution to the advancement of flood risk analysis by providing a quantitative assessment of the benefits of dynamic hazard modelling. It highlights its potential to improve the accuracy of exposure assessments and to inform equitable flood risk management strategies. The findings can guide policy makers, urban planners and stakeholders in developing more targeted and resilient flood mitigation measures.