Post on 01-Apr-2015
Irrigation system checks results – who’s responsible for poor performance Maxine Schache
Background
Story
Implications
MaxineGrumble
Background
Background
0 5 10 15 20 25 300
2
4
6
8
10
12
14
16
drip
low level
overhead
Pressure variation %
Dis
char
ge
vari
atio
n %
ResultsRepresentative sample
64 Drip systems (49 flow rate variations)
59 Low level sprinklers
Results
0 50 100 150 200 250 3000
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Drip pressure variation, discharge variation, nominal flow rate
Non PC 6.7,7.4,3
PC 13.6,8.3,2.2
PC 39.2,17.6, 1.6
PC 70.4, 11.4, 4.4
PC 69.2, 8,2.3
PC 11.8, 7.7, 2.3
PC 9.1, 2.4,2
PC 20, 11.5, 2.3
PC 12.1, 4.2, 2.3
PC 23.9, 9.5, 2
PC 10.3, 9.7, 1.6
PC 33.3, 4.2, 2.3
PC 10, 12.5, 2.3
Pressure KPa
Dis
ch
arg
e L
/Hr
Results
0 50 100 150 200 250 3000
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Drip pressure variation, discharge variation, nominal flow rate
Non PC 6.7,7.4,3
PC 13.6,8.3,2.2
PC 39.2,17.6, 1.6
PC 70.4, 11.4, 4.4
PC 69.2, 8,2.3
PC 11.8, 7.7, 2.3
PC 9.1, 2.4,2
PC 20, 11.5, 2.3
PC 12.1, 4.2, 2.3
PC 23.9, 9.5, 2
PC 10.3, 9.7, 1.6
PC 33.3, 4.2, 2.3
PC 10, 12.5, 2.3
Pressure KPa
Dis
ch
arg
e L
/Hr
6.7% PV7.4% DV
Results
0 50 100 150 200 250 3000
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Drip pressure variation, discharge variation, nominal flow rate
Non PC 6.7,7.4,3
PC 13.6,8.3,2.2
PC 39.2,17.6, 1.6
PC 70.4, 11.4, 4.4
PC 69.2, 8,2.3
PC 11.8, 7.7, 2.3
PC 9.1, 2.4,2
PC 20, 11.5, 2.3
PC 12.1, 4.2, 2.3
PC 23.9, 9.5, 2
PC 10.3, 9.7, 1.6
PC 33.3, 4.2, 2.3
PC 10, 12.5, 2.3
Pressure KPa
Dis
ch
arg
e L
/Hr
33.3% PV4.2% DV
70.4% PV11.4% DV
Results
0 50 100 150 200 250 3000
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Drip pressure variation, discharge variation, nominal flow rate
Non PC 6.7,7.4,3
PC 13.6,8.3,2.2
PC 39.2,17.6, 1.6
PC 70.4, 11.4, 4.4
PC 69.2, 8,2.3
PC 11.8, 7.7, 2.3
PC 9.1, 2.4,2
PC 20, 11.5, 2.3
PC 12.1, 4.2, 2.3
PC 23.9, 9.5, 2
PC 10.3, 9.7, 1.6
PC 33.3, 4.2, 2.3
PC 10, 12.5, 2.3
Pressure KPa
Dis
ch
arg
e L
/Hr
9.1% PV2.4% DV
Results
Drip 9/64 pressure5/49 discharge
Sprinkler38/59 pressure23/59 discharge12/59 DU
Results
Grade Drips Low level sprinklers
A
B
C
D
FAIL
WHY SO BAD?
PC
CID&
Industry confidence
&training
?