Flood resilience in Italy: Acting together

This report describes a probabilistic, high-resolution flood model for Italy developed by Swiss Re. The model simulates the interaction of fluvial with pluvial flood loss generation and can be used to assess accumulation risk and price reinsurance treaties and facultative (or single) risks. It was used to assess the large loss potential from pluvial and fluvial flood for both the regions of Italy and the country as a whole.

The model is based on the four-box risk-modelling framework, which combines four distinct components: the hazard, the vulnerability, the value distribution and the insurance conditions. The hazard model combines Swiss Re’s Global Flood Zones technology with an event-set generation method. The event-set generation method consists of four major modules: a rainfall-runoff model, a routing model, a statistical model and an event-set generator.

http://media.swissre.com/documents/Flood_Italy_Public_EN.pdf