Comparison of Putting Greens Constructed with AirField Systems and USGA Design.
Airfield Systems offers an alternative to the standard
USGA putting green design. Their design utilizes a
highly porous, I-inch deep plastic grid (AirDrain,
Figure 1) in place of a 4-inch deep gravel layer. As with
gravel, AirDrain allows rapid lateral movement of
excess water to drains and thus provides for uniform
horizontal moisture content within the root zone. While
voids in AirDrain are very effective in transmitting
water, they are much too large for the sand in the root
zone to bridge for self-support so a geotextile is used
atop the grid to prevent infilling of the void space. Use
of geotextiles in putting green construction has been
controversial due to the perceived potential for
clogging of the fabric by migrating fine particles and
eventual loss of permeability.