Method and apparatus for controlling drainage and irrigation...

Details Method and apparatus for controlling drainage and irrigation... Method and apparatus for controlling drainage and irrigation...

2008-02-19

2010-12-28

Mayo-Pinnock, Tara (Department: 3671)

Hydraulic and earth engineering

Drainage or irrigation

Control means responsive to sensed condition

C405S039000, C405S051000, C405S080000, C137S236100

Reexamination Certificate

active

07857546

ABSTRACT:
A method of and apparatus for controlling drainage/irrigation of a field includes laying out a network of spaced, interconnected water level-responsive valves coupled to drainage tiles, which typically may include a main line and a number of lateral lines, extending from higher elevations to lower elevations and exiting through a manually controlled main valve to a drainage ditch. When the water level adjacent a valve is below a predetermined level, the valve is open allowing water to flow down to the lowest level. As the ambient water level in the soil rises, the valve's float also rises, causing the valve to close when the water reaches a predetermined level and producing a “terracing” effect wherein the rising water is sequentially stored at increasingly higher elevations for irrigating these elevated areas. Overflow conduits associated with each valve allow water to discharge into the drainage ditch when the sub-surface water level is too high.

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