OASIS Water Management

Advanced ET Description

Advanced ET. Provide an automated ET driven water management capability where all irrigation schedules are automatically generated based upon dynamic plant water usage needs. Plant usage requirements are dependent upon user established station parameters including: precipitation rate, distribution uniformity, monthly plant crop coefficients, root zone depth, soil type, site microclimate, management allowable depletion, plant stress factor, and slope.

The Advanced ET water management module shall:

1. On a daily basis, automatically determine the water days, station runtimes, and frequency of application insuring that no water loss occurs due to runoff, or deep percolation.
2. Account for all water entering the root zone including: scheduled irrigation, manual irrigation/station testing, as well as effective rainfall.
3. Account for all moisture leaving the root zone based upon daily ET, the specific plant type material taking into consideration seasonal plant water usage requirements.
4. Account for any missed irrigation cycles (e.g. satellite power outages, mow days, no water windows, scheduled system shutdowns) and automatically "make-up" for lost irrigation needs.
5. Automatically schedule irrigation taking into consideration user defined satellite operating constraints including: allowable water days, water windows, electrical constraints (maximum simultaneous stations on), and hydraulic constraints (maximum g.p.m.).
6. Print/display the percentage of moisture remaining in the root zone of each station.
7. Display today's scheduled irrigation including station start and run times.
8. Provide safeguards to warn the operator for: water window violations, excessive depletion of root zone moisture (station brownout), operator entry errors resulting in scheduling inconsistencies or anomalies.
9. Provide water usage analysis function showing projected water usage on a weekly and monthly basis. Projections are based upon either the last 30 day average ET or any user selected ET value. Analysis for each station includes: cycles per day, runtime per day, maximum cycle before runoff, skip days, and weekly/monthly volumes and runtimes.
10. Allow any station to be programmed to utilize a normally open or either of two normally closed master valves with or without a pump or none of the above.