In response to global climate change and the increasing frequency of extreme natural hazards, an early intervention flood risk assessment methodology has been developed to assess damage at the building component level. This approach allows for the precise identification of vulnerable structural components and localized redesigns, leading to more cost-effective and safer structural solutions. The focus of this paper is on quantifying flood damage to components and visualizing the results, with two main objectives: 1) quantifying the damage and 2) interactive visualization.
Hydrodynamic simulations of compound floods under future climate scenarios are performed to apply the quantitative results at the micro level. Using future climate scenarios obtained by perturbing atmospheric data with a regional climate model, the top 24 hours of flood-driven data are selected to create inundation maps. Vulnerability curves for each material are plotted, taking into account the sensitivity of the component materials to water. Based on the water depth at each point, the failure probability is determined. This method of quantifying component vulnerability provides new insights into micro-level flood damage.
Finally, an integrated BIM-GIS model is constructed, and the damage level and distribution are displayed on the ArcGIS Pro platform. This allows different stakeholders to intuitively obtain damage level information. Users can customize their view, for example, by focusing solely on the damage to first-floor exterior windows or by examining the damage levels of components and buildings under different intensity flood ratings.