Inundated tunnels, basements, and houses: extreme precipitation can cause major nuisance and damage in cities. Usually, the main cause is that the design of urban areas is insufficiently geared to the storage and discharge of excessive precipitation. In addition, the drainage capacity of the sewer system may be inadequate, or cesspits, sewers, and culverts may be clogged by dirt accumulation. The WODAN123 methodology analyses the causes and shows how the city can combat pluvial flooding.

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