As it's so clearly explained, we share a part of the text of the Deltares' website with you. This tool provides you insight in the flood and disaster risk and financial (avoided) consequences.

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"The Aqueduct Global Flood Analyzer is a web-based interactive tool which measures river flood impacts by urban damage, affected GDP, and affected population at the country, state, and river basin scale across the globe. It aims to raise the awareness about flood risks and climate change impacts by providing open access to global flood risk data free of charge."