Sustainable Urban Drainage

Rainwater Harvesting

As part of our sustainable strategies, we have incorporated a rainwater harvesting strategy into the masterplan. Water is collected from the roofs of the proposed buildings on site and from the drainage system as a means of managing rainwater run-off.

When rain hits the surrounding roofs, the water would be directed through drainpipes into a filter and undergo a multiplestage purification process, to then be stored in a reservoir. The clean water can then be used for the toilets of the surrounding residential homes, to irrigate the surrounding park, or as a water fountain for people to play.

In times of heavy rain when the tanks would be filled with rainwater, excess water would be drained from the park using the retention basin and other sustainable urban drainage solutions such as permeable paving surfaces. Green roofs elsewhere in the site would provide a buffer for excess rainwater.

The incorporation of water into the linear park design was inspired by the reuse of rainwater, stormwater, and meltwater in a playful way at Hammarby Sjostad: a model for sustainable urban design.

Figure 7.10. Inspiration: Hammarby Sjostad Figure 7.9. Rainwater harvesting strategy