Apparatus and method of creating and controlling an artifical wa

Details Apparatus and method of creating and controlling an artifical wa Apparatus and method of creating and controlling an artifical wa

1986-03-10

1989-11-07

Corbin, David H.

Hydraulic and earth engineering

Drainage or irrigation

Including subsurface moisture barrier

405 50, E02B 1300

Patent

active

048787809

ABSTRACT:
An underground structure formed of rock and cinders permits an artificial water table to be maintained at a selected distance below the ground level. The installation includes a watertight membrane that lines a basin excavated in the earth. A ballast layer of generally uniform size rock is laid on top of the watertight membrane in the basin, and the ballast layer is extremely permeable by water. The ballast layer is covered by a permeable membrane such as cloth. The permeable membrane is, in turn, covered by a layer of finely divided particles such as crushed volcanic ash or cinders. The particles of this fine layer are prevented from penetrating the ballast layer by the permeable membrane. The fine layer permits water to diffuse through it by capillary action. The fine layer is topped by a finish layer which is appropriate to the use to be made of the installation. Water is inserted in the ballast layer causing the water table in it to rise to and above the permeable membrane, the amount of water provided to the finish layer can be adjusted by raising and lowering the water level. A method of leveling the structure is described as well as automatic apparatus for maintaining a particular water level.

REFERENCES:
patent: 3307360 (1967-03-01), Bailly
patent: 3408818 (1968-11-01), Hemphill
patent: 3625010 (1971-12-01), Hakundy
patent: 4576511 (1986-03-01), Vidal, Jr.

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