Passive Capillary Drainage

Narrow diameter rope, typically with a fibreglass outer covering and inner stainless-steel mesh forming a drainage tube. It is installed into an existing surface, such as a golf green, by being pulled through the soil profile, using a specially adapted type of mole plough with the cut slit being sealed afterwards with an attached roller which re-firms the surface. The drainage rope is installed at a depth of about 250mm, up to 600mm (for example at the Mere Championship Golf Club, https://themereresort.co.uk/blog/maintaining-a-championship-golf-course/, accessed 19th November 2022), and at a spacing of about 1m. Installation time for a typical sized golf green is about 1-day, or less. It is also sometimes referred to as Passive Capillary Rope Drainage, or just Rope Drainage.
See also Patent details at https://patents.google.com/patent/US20120230767A1/en.