Hydraulic and earth engineering – Drainage or irrigation – Including subsurface moisture barrier
Patent
1997-03-05
1999-08-17
Graysay, Tamara
Hydraulic and earth engineering
Drainage or irrigation
Including subsurface moisture barrier
405 36, 405 37, 405 39, 405 43, 405 50, A01G 2506, A01G 2516
Patent
active
059383720
ABSTRACT:
A subsurface irrigation apparatus and method, the apparatus including an underlayment of water resistant material which also serves as a mounting surface for the remaining elements of the subsurface irrigation apparatus. Water is supplied to the subsurface irrigation apparatus through a water supply conduit and distributed through a plurality of water distribution conduits. Each water distribution conduit includes a plurality of spaced holes through which the irrigation water distributed by the water distribution conduits. A diffuser is mounted across each hole to diffuse the water into the surrounding soil. Each diffuser includes a layer of fibrous material partially covered by a water resistant overlayment. The fibrous layer diffuses the water outwardly from the hole while simultaneously inhibiting root encroachment into the hole. A layer of coarse sand may be overlayed across said subsurface irrigation apparatus for helping diffuse the water into the soil, particularly those soils having a high content of clay. A valve and a controller to control the valve are also included. A moisture sensor can also be used to sense the moisture level in the soil to activate the controller.
REFERENCES:
patent: 3479825 (1969-11-01), Hellstrom
patent: 3908385 (1975-09-01), Daniel et al.
patent: 4832526 (1989-05-01), Funkhouser, Jr.
patent: 4881846 (1989-11-01), Burkstaller
patent: 5064308 (1991-11-01), Almond et al.
patent: 5306317 (1994-04-01), Yoshizaki
Graysay Tamara
Mayo Tara L.
Young J Winslow
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