Hydraulic and earth engineering – Drainage or irrigation – Porous or apertured pipe – flume – or tileway
Patent
1979-02-12
1980-11-25
Bagwill, Robert E.
Hydraulic and earth engineering
Drainage or irrigation
Porous or apertured pipe, flume, or tileway
47 485, E02B 1300
Patent
active
042355613
ABSTRACT:
A porous, or semi-permeable, pipe is placed below the surface of the soil in the area to be irrigated and a flow of water maintained therein. This avoids such practices as sprinkling, furrowing or ditching, and subsequent cultivation, and thereby permits the surface of the land being irrigated to be continuously maintained in the condition most conducive to vegetation growing thereon. It also greatly avoids excessive loss of water by evaporation, puts the water in that position in the soil where it is most useful, and obviates the necessity of having the land level, or nearly so, as required by the more usual methods of gravity-flow irrigation. A steeply sloping hillside can be irrigated quite as easily as a flat plain. Mathematical relations are developed to optimize physical dimensions and flow properties as a function of applied pressure.
REFERENCES:
patent: 3407608 (1968-10-01), Whitehead
patent: 3518831 (1970-07-01), Tibbals et al.
patent: 3552654 (1971-01-01), Thomas
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