Irrigation control and flow management system

Details Irrigation control and flow management system Irrigation control and flow management system

1991-02-25

1993-07-20

Envall, Jr., Roy N.

Boots, shoes, and leggings

239 69, A01G 2516

Patent

active

052299376

ABSTRACT:
Method and apparatus for controlling an irrigation system within prescribed limits of pump capacity and flow capacity through water line branches and defined local zones. Watering schedules may be all simultaneously activated and will make multiple requests for watering time, for posting in a flow management roster. The requests in the roster are processed and satisfied only if overall pump capacity permits and if local flow zone capacities, and the capacities of water lines feeding the flow zones, are not exceeded. Pump capacity is expanded incrementally as more requests are processed, but only in accordance with predefined limits on the conditions that have to be met before moving to an expanded capacity. This flow management technique is best employed with a cycle-and-soak feature to avoid runoff problems at selected sites, and using an evapotranspiration approach to vary the watering times in accordance with changing weather conditions.

REFERENCES:
patent: 4015366 (1977-04-01), Hall, III
patent: 4646224 (1987-02-01), Ransburg et al.
patent: 4712376 (1987-12-01), Hadank et al.
patent: 4821580 (1989-04-01), Jorritsma
patent: 5023787 (1991-06-01), Evelyn-Veere
Patent Abstracts of Japan, vol. 10, No. 48, Oct. 1, 1985, Karasawa Abstract. No. 60-193006.
Patent Abstracts of Japan, vol. 11, No. 399, Jul. 18, 1987, Wada, Abstract No. 62-162101.

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