Flood hazard zone plan Vienna

Overview of flood-prone areas for flood events that occur statistically once in a hundred years. The expulsions are based on precipitation and drain tests for the respective catchment area of the flowing water. The flood-prone areas are divided into different zones in accordance with the technical guidelines for the Federal Water Engineering Administration (Bundeswasserbauverwaltung BWV). Hazard zone identification: Red zone = no construction zone, red-yellow zone = retention, drainage and water management zone, yellow zone = bidding and precautionary zone, blue zone = water demand zone