Abstract: A subsurface water drainage system which includes a high porosity cylinder made of a mixture of Portland cement and activated charcoal, such cylinder disposed vertically in the subsoil to receive water discharge therein and to direct such water through its porous midsection into adjacent subsoil at a rate sufficient for dispersing the water to prevent yard surface flooding.

Abstract: An underground fluid exchange system for control of delivery of fertilization, irrigation and pesticides to and removal from a selected fully encapsulated the turf area of a playing field, including golf course green, having a selected soil profile including a combination turf and topsoil turf segment, a porous soil segment and an impervious soil segment wherein the fluid exchange system comprises a bi-flow porous conduit having uniform porosity that has a selectable exchange rate.