100% of new development meets 100mm/hr rainfall standard; Benthemplein water square stores 1.7 million litres
Figures reported by the city programme, verified against published case-study sources.
Background
Seventy percent of Rotterdam lies below sea level. Rather than simply hardening defences, the city adopted a “water-sensitive city” philosophy — treating water as an asset to be held and celebrated rather than a threat to be drained away.
Key Projects
Benthemplein Water Square: The world’s first water square — a public space that functions as a recreational plaza in dry weather and a 1.7 million-litre retention basin during downpours. Replicated in cities from Beijing to São Paulo.
Floating Pavilion: A climate-resilient floating structure in the Rijnhaven harbour demonstrating adaptive construction techniques for sea-level rise.
Water-Sensitive Urban Design Standards: All new Rotterdam developments must accommodate 70mm of rainfall per hour on-site with no runoff to sewers.
Results
- Zero sewer overflow events in 2022 during storms that would previously have flooded streets
- Rotterdam’s water square concept exported to 28 cities globally
- Property values in water square catchment areas increased 12% above citywide average
