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NOVEMBER 2015
CERTIFICATION PROGRAM Landscape/Turf Specialty Commercial Examination Equations
Page 1 of 2
Basic and non-irrigation equations and conversions are assumed to be known by candidates. POI refers
to Principles of Irrigation, 3nd ed. Dec. 2012. Irrigation Association. 6th ed. refers to Irrigation, Irrigation Association.
Handbook refers to Handbook of Technical Irrigation Information, Hunter, 2010. The equations are presented in the latest
IA format and may appear different from those presented in the reference material.
1 cubic meter of water = 1,000 liters 1mm = 1 l/m2 1mm = 10 kl/ha 1 liter water weighs 1 kg
PAW AW RZ ร POI 2-4 AD PAW (M AD / 100) ร POI 2-5
c o cET ET K POI 2-8
๐ =5,988 ร ๐ด ร ๐ธ๐๐ ร ๐พ๐
๐ก ร (๐ธ๐
100)
POI 5-8
๐ด =๐ ร ๐ก ร (
๐ธ๐
100)
5,988 ร ๐ธ๐๐
POI 5-8a This space intentionally left blank.
๐ =5,988 ร ๐ด ร ๐ธ๐๐
๐ก ร (๐ธ๐
100)
POI 5-8 ๐ป = 0.102 ร ๐ POI 8-1
Q A V ร POI 8-2 ๐ =
1.273 ร ๐
๐ผ๐ท2
POI 8-3
2
v
VH
2 g
รPOI 8-4
2 2
1 2
p 1 1 p 2 L2
V VH Z H Z H
2 g 2 g
ร ร6th ed. Ch. 7 p. 233
2
z z
VH k
2 g
Z= various values depending upon equation
POI 8-8, 8-9. 8-10, 8-11
22
1
2
2
DK 1
D
POI 8-12
22
1
2
2
DK 0.7 1
D
ร POI 8-13 ๐ป๐ = 2.38 ร 108 ร (
100
๐ถ)
1.852
ร๐1.852
๐ท4.866ร
๐ฟ
100
POI 8-7
๐ = ๐พ๐ฅ ร ๐๐ฅ6th ed. Ch. 7 p. 253 0 0
Q P
Q P
6TH ed. Ch. 7 p. 254
NOVEMBER 2015
CERTIFICATION PROGRAM Landscape/Turf Specialty Commercial Examination Equations
Page 2 of 2
๐๐ =60ร๐
๐ดr s
2
s
t S
Vario u s A va lu es
A = S S
A = 0.866 S
A = 0.8 D S
ร
ร
ร ร
POI 3-2, 3-4, 3-5
This space intentionally left blank.
P(Kw) =Q ร H
102
POI 9-2 P(Kw) =
Q ร H
102 ร (Ep
100)
POI 9-3
a s f vpN PSH a H H H H POI 9-1
2 2
1 1
Q N
Q N
POI 9-5
2
2 2
1 1
H N
H N
POI 9-5 kW pump2
kW pump1= (
N2
N1)
3
POI 9-5
2 2
1 1
Q D
Q D POI 9-6
2
2 2
1 1
H D
H D
POI 9-6
kW pump2
kW pump1= (
D2
D1)
3
POI 9-6 V I R ร POI 10-1
๐๐ =5.19 ร (๐ฃ๐๐๐๐๐๐ก๐ฆ) ร (๐๐๐๐๐กโ ๐๐ ๐ ๐ก๐๐๐๐โ๐ก ๐๐๐๐)
(๐ฃ๐๐๐ฃ๐ ๐๐๐๐ ๐๐๐ ๐ก๐๐๐)
POI 8-15 m
c
A DIN
ET POI 5-3
net a cIR IN ET ร POI 5-4
similar
net
gross
a
IRIR
E / 100 POI 5-4
grossIR
RT 60PR
ร POI 5-5 This space intentionally left blank.