Where does the rainwater drain? Rain and drainage is the same water but there’s a large difference in these two words. Within architecture and urban cities, I was thinking of a design to appreciate the rainwater not as to just expedite it but as a water flow.
The roof, with its galvalume surface, was designed to let the rainwater runoff slowly slide down along the corrugated roof. The harvested rainwater is subsequently diverted to soak the garden plants and reach underground. If the water couldn’t be permeated it finally runs into the sewer, along the drainpipes.
The roof, with rainwater rolling down along the surface, is the facade of the building. The long-sloped roof system hangs down towards the ground, ending as a narrow gutter.