https://www.nps.gov/places/water-clock.htm
Water Clock (U.S. National Park Service)
u s national parkwater clockservice
https://www.gov.uk/government/publications/clock-house-farm-limited-npswr046654-application-made-to-abstract-water
Clock House Farm Limited (NPS/WR/046654): application made to abstract water - GOV.UK
The Environment Agency has received an application from Clock House Farm Limited to vary a licence to abstract (take) water.