Rill

A narrow channel that moves water across a site slowly and audibly. The oldest device in the book and still the cheapest to run.

Merrow Group · Rotterdam, Netherlands · 2023

A 34 m rill runs the length of the courtyard and disappears under the building, so the water reads as older than the walls.

Halden Public Library · Copenhagen, Denmark · 2020

Water steps down 1.8 m across nine granite treads and audibly marks the walk from the street to the library door.