MIL-HDBK-1165
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Zone 1
Turfgrass and vegetable garden with high water
requirements.
Zone 2
Exotic shrubs with moderate water requirements.
Zone 3
Continuously rooting ground cover with low water
requirements.
Zone 4
Native adaptive trees and shrubs requiring supplemental
irrigation during the establishment period.
Figure 20
Sample Yard Xeriscape
5.6.6
Subsurface Irrigation. Whether you are considering a
graywater system or a wastewater reclamation system, subsurface
might be the best solution. By watering subsurface, many of the
health restrictions concerning human contact can be avoided.
With subsurface irrigation coliform and bacteria levels may not
be as critical as for surface applied waters, however, total
suspended solids does become critical. (Refer to EPA/625/R-92/004
"Guidelines for Water Reuse.") The emitters used with subsurface
systems will require more frequent cleaning if the water used
contains large amounts of dissolved solids.
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