landscape/turf specialty commercial examination equations
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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 Γ POI 2-4 AD PAW (M AD / 100) Γ POI 2-5
c o cET ET K POI 2-8
π =5,988 Γ π΄ Γ πΈππ Γ πΎπ
π‘ Γ (πΈπ
100)
POI 5-8
π΄ =π Γ π‘ Γ (
πΈπ
100)
5,988 Γ πΈππ
POI 5-8a This space intentionally left blank.
π =5,988 Γ π΄ Γ πΈππ
π‘ Γ (πΈπ
100)
POI 5-8 π» = 0.102 Γ π POI 8-1
Q A V Γ POI 8-2 π =
1.273 Γ π
πΌπ·2
POI 8-3
2
v
VH
2 g
ΓPOI 8-4
2 2
1 2
p 1 1 p 2 L2
V VH Z H Z H
2 g 2 g
Γ Γ6th 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
Γ POI 8-13 π»π = 2.38 Γ 108 Γ (
100
πΆ)
1.852
Γπ1.852
π·4.866Γ
πΏ
100
POI 8-7
π = πΎπ₯ Γ ππ₯6th 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
ππ =60Γπ
π΄r s
2
s
t S
Vario u s A va lu es
A = S S
A = 0.866 S
A = 0.8 D S
Γ
Γ
Γ Γ
POI 3-2, 3-4, 3-5
This space intentionally left blank.
P(Kw) =Q Γ H
102
POI 9-2 P(Kw) =
Q Γ H
102 Γ (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 Γ POI 10-1
ππ =5.19 Γ (π£ππππππ‘π¦) Γ (πππππ‘β ππ π π‘ππππβπ‘ ππππ)
(π£πππ£π ππππ πππ π‘πππ)
POI 8-15 m
c
A DIN
ET POI 5-3
net a cIR IN ET Γ POI 5-4
similar
net
gross
a
IRIR
E / 100 POI 5-4
grossIR
RT 60PR
Γ POI 5-5 This space intentionally left blank.
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