The grey water from the handwash basins and kitchen basins is directed into a 20 sq.m constructed wetland located in the central courtyard. The natural purification of the water is achieved through the root action of the reed bed. This treated greywater together with harvested rainwater is used for flushing and irrigation. The wetland also attracts bird and insect life which enhances the biodiversity of the site. The site makes use of indigenous and endemic plants which require less water and are more robust against insects and disease. 70% of the site is covered in indigenous gardens which reduces the heat island effect associated with a tarmac parking lot. There are also underground detention tanks for the storage of water and a feature pond to enhance indoor amenity value.
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