Subsurface
Drip Irrigation
Techline
AS
Applications:
- for
subsurface or on-surface installations
- curved,
angular or narrow planting areas
- high
traffic/high liability areas
- areas
subject to vandalism
- windy
locations
- turf,
shrubs, trees
- slopes
Features:
Subsurface
drip irrigation involves the application of water to plants or
turf via pipes and emitters installed totally underground.
Specifications:
Wall
thickness - 1.2mm
Flow rates
- 1.6 and 2.3 litres per hour
Pressure range - 5-40m
Internal diameter - 13.2mm
Emitter spacings - 0.3, 0.4 or 0.5m
Colour - Brown
Maximum
run lengths:
|
Inlet
Pr
|
15m
|
30m
|
15m
|
30m
|
15m
|
30m
|
|
Spacing
|
0.3m
|
0.3m
|
0.4m
|
0.4m
|
0.5m
|
0.5m
|
|
1.6
L/hr
|
68m
|
110m
|
8m
|
142m
|
107m
|
172m
|
|
2.3
L/hr
|
54m
|
86m
|
69m
|
112m
|
84m
|
136m
|
Uniformity of water application:
A
highly desirable feature of drip irrigation is the excellent uniformity
of water application that can be achieved. With poor irrigation
uniformity it is necessary to over-irrigate in order to ensure
a proper coverage of the drier zones. Therefore, good uniformity
equals more efficient irrigation. It has been estimated that a
subsurface drip irrigation system can save between 35-45% of water
that would normally have been applied using a conventional sprinkler
system.
Sprinkler
City recommends the use of pressure reducers when using drip irrigation.
Drip irrigation is most effective at 25-50 psi.
Controlled
root zone environment:
A
totally new and more favourable root zone environment can be created
using subsurface drip irrigation. Plants will have a greater tolerance
to salinity and greater control over disease.
Description
of a subsurface drip installation:
Techline
AS subsurface drip irrigation tubing can be used with standard
irrigation poly fittings. In brief, the system normally consists
of a main/header line and a collector line with a series of dripper
tube laterals connecting between them, normally in a grid pattern.
The header line and collector line can be either PVC or poly tube.
In
all subsurface installations the use of a Tech Filter is recommended
to protect against root intrusion. The filter Cartridge is coated
with the chemical Trifluralin, and will need to be relaced approx.
every 2 years.
It
is also recommended that an Air Release / Vacuum Breaker be installed
at the highest point on the zone, and a Flushing Valve at the
lowest or furthest point.
See
diagram below for basic layout.
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