Irrigation zoning
Irrigation zones can be designed to increase the uniformity
of application. A properly licensed irrigation designer should be used
to ensure that zones do not overlap, are based upon the capacity of the
anticipated equipment, and take into account the landscape materials to
be planted (i.e., do not place overhead sprinklers heads where planned
for trees or shrubs will block their throw). Water conservation programs
can help ensure these policies are followed by the rules for irrigation
system approvals for new construction – using
plumbing inspectors and/or back flow assembly inspectors to ensure that plans
were designed by licensed irrigators; and enforcing these state requirements
by fines, or refusing to approve systems until properly designed plans are
filed with the plumbing inspector. The cost of such programs can be added
as a small increment to existing plumbing inspection fees, if deemed necessary.
Proper choice of irrigation equipment is an essential part
of good zoning. Drip and micro irrigation zones should be separated from
overhead sprinkler zones, since less water is lost to evaporation. A “smart” water
controller can be programmed for different run time for different zones.
Minimum standards for irrigation controller features, such as the use of
ET, variable run times, choice of different days for irrigation, can all
be imposed by ordinance, or can be encouraged through incentives such as
rebates.
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IRRIGATION
Efficient Irrigation
Subsurface, drip -
Micro Irrigation
Alternate Sources |