In the context of urban planning, concepts of multiple land-use refer to situations were the existing space is more intensively used (Habiforum, cited in Hooimeijer et al, 2001). This can be achieved by morphological integration of functions (stacking of multiple functions in one building or construction), by mixed space use (multiple functions in a certain defined area) and by temporal shared-use of the same space. @en

The Roof Park ('Dakpark’) is an elevated park on a former railway yard in the Delfshaven quarter in Rotterdam. The park is located on top of the roof of a new shopping centre, which includes a parking garage (hence its name, ‘dak’ means ‘roof’). The park is the largest green roof in Rotterdam and one of the largest in the Netherlands. The park offers a playground, communal garden and a Mediterranean garden with an orangery (figure 9). The Roof Park is 1,000 m long and 80 m wide. The park is situated 9 m above street level. There is 25,000 m2 retail spaces under the city park, and the structure includes a car park with space for about 750 cars. The gardens bring more nature to the district, and the project as a whole has provided more employment. The Roof Park is combined with a dike, the ‘Delflandse Dijk’, that is part of dike ring 14, which protects the urban area of the Randstad. @en