Client: City of Alphen aan den Rijn
Partners (in NL): TU Delft, APRIA Systems, Aveco de Bondt
Funding: EU LIFE program
Year: 2023–2027

Problems solved: Heat stress and flooding in dense city centre, seasonal mismatch between rainfall and irrigation demand, unsustainable potable water use for green infrastructure, limited underground storage space, water safety requirements for close-contact urban use
Rainwater reused for: Irrigation of green roofs and facades

Impact: 15 million liters/year of drinking water saved; 50,000 m² of green roofs and facades supplied; rainwater captured from 31,000 m² of paved surfaces

Client: Municipality of Rotterdam
Year: 2020–2021

Problems: Sewer overflow, climate-proofing city centre, public water awareness / education

Rainwater reused for: Deep underground storage; children's interactive hand pump; public demonstration

Impact: 4,000 m³/year reused; 10,000 m³ stored; 1,200 m² catchment