T E C H L I N E A S ™ D E S I G N G U I D E
NETAFIM @[email protected]
21/12/2009
29
TECHLINE AS™ DESIGN FORMULAS:
FORMULA 1.1
ESTIMATED TOTAL LENGTH OF DRIPPLERLINE
Irrigated Area (m
2
) .
Minimum Recommended Lateral Spacing (m)
In which:
Estimated Total Length of Dripperline = Total Metres of Dripperline in a Zone
Irrigated Area = Total Area in Square Metres
Minimum Recommended Lateral
(Row
) Spacing = The Minimum Row Spacing in Table 1.
Example: Area 200m
2
and Minimum Recommended Lateral Spacing of 0.5m.
200m
2
= 400m
0.5m
Total Length of Dripperline is 400m.
FORMULA 1.2
APPLICATION RATE (mm/Hr)
Drip Discharge Rate (L/H) .
Dripper Spacing (m) x Dripperline Row Spacing (m)
In which:
Application Rate is = mm per Hour of Water Being Applied
Dripper Flow Rate = Litres per Hour Flow of One Dripper
Dripper Spacing = Spacing in Metres of Drippers Inside Tubing
Dripperline Row Spacing = Metres Between Techline AS™ Laterals
(Rows)
Example: Drip Discharge Rate of 1.6L/H, Drip Spacing of 0.4m and Dripperline Row
Spacing of 0.5m.
1.6L/H .
=
1.6L/H
= 8.0mm/Hr
0.4m x 0.5m
0.2m
2
Application Rate is 8.0mm/Hr per square meter of area irrigated.
FORMULA 1.3
NUMBER OF DRIPPERS IN A ZONE
Total Dripperline (m)
Dripper Spacing (m)
In which:
Number of Drippers = Total Number of Drippers
Total Dripperline = Length of all Dripperline in a Zone in Metres
Dripper Spacing = Spacing in Metres of Drippers Inside Tubing
Example: Total Dripperline of 400m and Dripper Spacing of 0.4m.
400m
=
1,000 Drippers
0.4m
Total number of drippers in this zone is 1,000 drippers.
