|
-Introduction
-Basic
Layout
-Additional
Layout Options
-Soil-Water
Relationship
-Product
Selection Guide
-Spacing
Between Dripperlines
-Length
of Dripperlines
-Other
Components
-Slopes
-Simplified
Design
-Subsurface
Systems
-System
Monitoring
-Application
Rates
-System
Flow Rates
-How
to Specify
-Technical
Data
-Performance
Specs
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The following formula should be used
to calculate the total system flow rate.
| System Flow Rate (gpm) = |
2.4 x
Irrigated Area (feet2) x Emitter Flow Rate (gph)
Emitter Spacing (inches) x Dripperline Spacing
(inches) |
| Example: |
| |
Irrigated Area = |
7500 square feet |
| |
Emitter Flow Rate = |
1 gph |
| |
Spacing Between Drip
Emitters = |
18" |
| |
Spacing Between
Dripperlines = |
16" |
|
|
Question:
What is the system flow rate? |
|
|
| Solution: |
| System Flow Rate = |
2.4 x 7500 x 1
16 x 18 |
= 62.5 gpm |
|
The following formula may also be used.
| System Flow Rate (gpm) = |
0.2 x
Total Length of Dripperline (feet) x Emitter Flow Rate (gph)
Emitter Spacing (inches) |
| Example: |
| |
Total Length of
Dripperline Used = |
600 feet |
| |
Emitter Flow Rate = |
2 gph |
| |
Spacing Between Drip
Emitters = |
12" |
|
|
Question:
What is the system flow rate? |
|
|
| Solution: |
| System Flow Rate = |
0.2 x 600 x 2
12 |
= 20 gpm |
|
Chart 7 offers a simpler method of
calculating total flows. Calculate the total footage of DURA-FLOTM PC
dripperline used, divide that by 100 and then multiply by the appropriate
number in the chart.
|
Chart 7
|
| Nominal
Flow Per 100 Feet |
| Dripper
Spacing |
1/2 gph |
1 gph |
2 gph |
| 12" |
50 gph (.83
gpm) |
100 gph (1.67 gpm) |
200 gph (3.33
gpm) |
| 18" |
33 gph (.55
gpm) |
67 gph (1.12 gpm) |
133 gph (2.22
gpm) |
| 24" |
25 gph (.42
gpm) |
50 gph (.83 gpm) |
100 gph (1.67
gpm) |
|