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Terracotta cools as water transpires from it. This effect is applied to urban heat islands by creating a cooling terracotta terrain. The collective surface area of the cooling terrain not only replaces heat storing and radiating surfaces, but in the context of an urban heat island, acts as heat pump cooling the surrounding area.
Water is pumped from the top of the wall and falls into and follows the grooves in the tiles. These grooves allow the water to flow over the tiles and still offer dry surface for people to walk or sit on.
The final terracotta tiles could be industrially extruded; a technique that is cheap, fast, and easy to use. To design the terrain out of modular tiles I made scale MDF tiles so I could experiment with different variations like a child would do with a wooden block set.