Flood data mapping and analysis for early warning and urban planning in Vietnam

The Zurich Climate Resilience Alliance’s ‘Solutions’ series shares practical and replicable local knowledge through our work across the world on how to build resilience to climate hazards. ISET-International (ISET) and the provincial DRM agency conducted a flood trace study to identify high-water marks, which indicate maximum flood depths, for the October 2022 flood in Huế City, Vietnam. The high-water marks and their locations were integrated into the GIS database of Huế City and were compared with historical flood depths, rainfall, and river levels during this and previous events to identify both climatic and non-climatic drivers of observed changes in flood patterns. This information is also being used to support urban development planning and flood early warnings.