The GIRI, or the Global Infrastructure Risk and Resilience Model and Index of CDRI, is a comprehensive system of indicators of risk and resilience that encompasses all countries and territories worldwide. Currently, GIRI addresses six natural hazards: earthquakes, tsunamis, landslides, floods, tropical cyclones, and droughts1. The last four include the alterations induced by climate change, thus offering hydrometeorological risk metrics related to various greenhouse gas emission scenarios in the future, in addition to stationary risk metrics for geological hazards. GIRI, presently, encompasses nine infrastructure sectors: power, highways and railways, transportation, water and wastewater, communications, oil and gas, education, health, and housing.

Background Report, INGENIAR: Risk Intelligence for the CDRI Flagship Report.

This document include supplementary material about The GIRI global flood hazard model paper.

In the recent years, global flood models have emerged as practical tools to transform our understanding of global
flood risk. However, the large computational efforts needed to produce them limit the existing applications to a few scenarios, partial coverage, or coarse resolution products. In this article, we present a methodological approach for producing 90m resolution global flood hazard maps for different flood magnitudes under present and future scenarios.

The approach relies on a cascade of calibrated meteorological-hydrological-hydraulic models and integrates global datasets of atmospheric variables for the present climate and from bias corrected projections of future climate from the ISIMIP3b initiative, enabling the creation of comprehensive and detailed flood hazard maps for different return periods. The significance of such mapping lies in its ability to address the challenges posed by local and global-scale flood events, as well as the impact of climate change on flood risk management. Results contribute to the Global Infrastructure Risk Model and Resilience Index with an advanced hazard product with key implications for improved financial loss assessment, aid in disaster risk reduction efforts, and for global impact assessments.