irrigation review session
TRANSCRIPT
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PE On-Line ReviewSession
IC: Water Management et. al.Chris Henry, P.E.
University of Nebraska-Lincoln
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Agenda
Who am I
PE Exam, Study Guide, test taking tips
Section IC
Evaporation Nutrient Management
Drainage
Irrigation
PumpsSurface
Sprinkler
Have reference materials
Available for todays session
Standards, soil and water, andIrrigation texts you intend to use.
Straight-edge and calculator
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Who am I?
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Why take the Ag Exam?
Civil has more reference materials, so the
test will be easier, and they are very easy
on my pocket book.
Civil tests more things that I am doing in
my job, they have a exam that is for me!
Ice cream is ice cream, what flavor would
you like? Minimum competency, what is that?
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Status of Study Guide
Sponsored by PEI of ASAE
Review Guide
Next Revision will be?
Practice Exam 60 out of 80 questions
completed
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Most Asked Questions
How many books to bring
Which books do I bring?
How long should I study.
How should I study
How can I cover it all
What is considered passing
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Tips: Before the Exam
If not local, travel to testing site
the night before. Know whereyou are going.
Get a good nights rest the day
before the exam. Plan your lunch.
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Tips: During the Exam
Watch the amount of time spent on each
question.
Double check score sheet bubbles foraccuracy and completeness
Dont Relax
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Tips: After the Exam
NCEES must score over 100,000 exams
every year.
You will receive a notification about 3-4months after the examination day.
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How to use the Study Guide
Study Guide problems alone will not prepare you
for the exam.
Problems should give you a understanding ofwhat to expect on exam.
Become familiar with where to find important
information in reference materials (i.e. where areconversion factors, reference data, etc).
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Todays Topics
Evaporation/Evapotranspiration
Irrigation
Nutrient Management/Loading Rates inSoils
Water Quality
Other things I dreamt up
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Evaporation
Where would we find such information?
What might we be asked?
Penman?
Pan?
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Evapotranspiration (ET)
Reference Crops
Crop Coefficients
Pan Evaporation
Irrigation Scheduling
Evaporation
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Evaporation
The mean annual lake evaporation in
inches in North Central Nebraska, is
most nearly:
A.50B.60C.70D.80
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Evaporation
The mean annual lake evaporation in
inches in North Central Nebraska, is
most nearly:
A.50B.60C.70D.80
Answer 50, page 57 Schwab or most any
Hydrology or other soil water text.
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Surface Water / Ground Water
Well Sizing
Well Development
Salinity Management
Water Quality
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Water Quality
Which of the following causes the most
non-point source pollution to rivers in the
U.S.?
a) Microbial pathogens
b) Industrial waste discharges
c) Nutrients
d) Siltation
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Nutrient Management/Loading of
Soils
Could be easy-could be hard
There are only a few tables that are likely to be
used/exist
MWPS-18, MWPS-18 (series), Part 651 (Ag WasteManagement Field Handbook) and Manure
Production in Standards
Download Chapters 4, 6, and 10 (including
Appendix) from NRCS website Waste Production Book Values or Dietary
Approach (Standard D384.1)
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Nutrient Management
One feeder pig produces 12.4 lbs of manure perday. Assuming that manure has the samedensity as water, how much manure, in cubicfeet, is most nearly produced annually from a1000 head barn that has 3 sets (or turns) peryear.
a) 40,000
b) 70,000c) 76,000d) 257,000
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Nutrient Management
One feeder pig produces 12.4 lbs of manure perday. Assuming that manure has the samedensity as water, how much manure, in cubicfeet, is most nearly produced annually from a1000 head barn that has 3 sets (or turns) peryear.
a) 40,000
b) 70,000c) 76,000d) 257,000
Answer B,
12.4/62.4*1000*365=72,532
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Nutrient Management/Facilities
The maximum loading rate (pounds of
volatile solids per 1000 cubic foot per
day) for an anaerobic lagoon for animal
waste in North Dakota is most nearly:
a)2.0b)3.0
c)4.0d)5.0
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Nutrient Management/Facilities
The maximum loading rate for an
anaerobic lagoon for animal waste in
North Dakota is most nearly:
a)2.0b)3.0c)4.0
d)5.0
B, 3.0, EP406.1 or Part 651 Ag Waste
Management Field Handbookor MWPS-18-2
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Loading of Soils Conversions
K 1.2 K2O
N 4.43 NO3
P 2.29 P2O5
N 1.29 NH4
cu ft 7.48 gallons
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Runoff computation
Rational Method
SCS Curve Method
Channel design
Mannings equation
Shape formulae
Erosive and nonerosive
velocities (slopes &
vegetation)
Surface Drainage
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Culvert design
inlet and outlet
conditionsSedimentation basins
size
retention time
inlets and outlets
Terraces
Surface Drainage
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Crop rooting depths
Ellipse equation (Hooghoudt
equation)
drain depth and spacing
hydraulic conductivity
drainage rates
Design flows
drainage coefficients in
humid regions
leaching fraction in arid
regions
Sub-Surface Drainage
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Drain types
tile (tubing)
mole
Drain design
location
size (diameter and length)
materials
installation methods
inlets and outlets
Sub-Surface Drainage
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Irrigation /Drainage
The flow capacity in cfs of a 4 inch plastic
corrugated drain tile at a slope of 1 ft/100
ft is most nearly:
a)0.15b)1.5
c)2.0d)4.5
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Irrigation /Drainage
The flow capacity in cfs of a 4 inch
plastic corrugated drain tile at a slope of
1 ft/100 ft is most nearly:
C, 0.05, use nomograph
Drainage Design pg 307 or
ASABE standard EP260
1 ft/100 ft OR 1%
0.16 cfs or
4.5 L/s*(0.0353)
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Irrigation /Drainage
The flow capacity in cfs of a 4 inch
plastic corrugated drain tile at a slope of
1 ft/100 ft is most nearly:
a)0.15b)1.5
c)2.0d)4.5
C, 0.05, use nomograph
Drainage Design pg 307 or
ASABE standard EP260
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Irrigation
Need at least One good irrigation reference
Pumps
Efficiency and Power Affinity Law
Bernoulli
Everything is game
Sprinklers and emitters
Pipelines Have a good reference for friction loss in all
types of pipes and fittings
Water Use and Efficiency
DESIGN OF IRRIGATION SYSTEMS
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DESIGN OF IRRIGATION SYSTEMS
Water supply systems for the conveyance
and distribution of water to enhance
the growth of crops and the recoveryand/or reuse of water;includes surface,
sprinkler, trickle and sub-surface
systems as well as pumps, wells,
and pumping plants.
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Conveyance Methods
Open Channels
Lined Canals
Unlined Canals
Pipelines
Surface Irrigation
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Set-Move Systems
Solid-Set Systems
Continuous-Move Systems
Linear-Move Systems
Mainlines / Lateral Lines
Sprinkler Irrigation
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Filtration Requirements / Filtration Systems
Drip Tape / Emitters
Emission Uniformity
Micro-Sprinklers
Mainlines / Manifolds / Laterals
Flow Regulation
Micro Irrigation
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Injection Systems
Propagation Time
Water Supply Protection Requirements
Chemigation
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Water Requirements
Sprinkler Head Selection
Head Spacing
Frost Protection
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Application Efficiency
Application Uniformity
Conveyance Efficiency
Overall Efficiency
Operating and Capital Costs
System Performance
D k h t fi d th
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Mannings
Hazen-Williams
Pump Equations
Power Requirements
Affinity Laws for Centrifugal Pumps
Do you know where to find these
equations?
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Irrigation
The power in HP that must be delivered
to a pump to maintain a flowrate of 800
gpm of water at 40 ft of head, with a
pump efficiency of 60% is most nearly:
a)7.5b)10
c)15d)20
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Irrigation
The power in HP that
must be delivered to a
pump to maintain a
flowrate of 800 gpm of
water at 40 ft of head,with a pump efficiency of
60% is most nearly:
a) 7.5b) 10
c) 15d) 20
Find equation for power
in Schwab or other
reference. Convert
units.
%
))((8.9
8.9
3
mKW
E
QhKW
sm
p
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Irrigation
The power in HP that
must be delivered to a
pump to maintain a
flowrate of 800 gpm of
water at 40 ft of head,with a pump efficiency of
60% is most nearly:
a) 7.5b) 10
c) 15d) 20
Answer 15 (actually 13), Use
equation, requires many
conversions, using Schwab as the
equation is only in metric.
HPKWHPKW
KWm
KW
mft
mfth
cfssgal
f tgalQ
sm
sms
m
1334.189.9
89.960.0
12)05.0(8.9
123048.0
40
05.0028317.0
60
min
48.7min
800
3
3
33
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Irrigation
The operating pressure of a 1/8 inch
impact sprinkler with a nozzle coefficient
of 0.98 and a discharge of 3.51 gpm is
most nearly:
a)35b)40
c)55d)60
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Irrigation
The operating pressure
of a 1/8 inch impact
sprinkler with a nozzle
coefficient of 0.98 and a
discharge of 3.51 gpm ismost nearly:
a) 35b) 40c) 55d) 60
98.0
1052.82
2
25
2
12
81
C
f txxA
ghACQ
Look up sprinklers in Schwab
or find equation for orifice flow
From other hydraulics reference.
Solve for area of orifice.
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Irrigation
The operating pressure
of a 1/8 inch impact
sprinkler with a nozzle
coefficient of 0.98 and a
discharge of 3.51 gpm ismost nearly:
a) 35b) 40c) 55d) 60
Convert gal to cfs.Rearrange equation to solve
for pressure.
psif t
psi
f th
f th
hg
f tx
cfs
ghAC
Q
cfssgal
f tgalQ
5931.2136
136
)(2
)98.0(1052.8
00782.0
2
00782.060
min
48.7min
51.3
2
25
3
ghACQ 2
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Irrigation
The operating pressure
of a 1/8 inch impact
sprinkler with a nozzle
coefficient of 0.98 and a
discharge of 3.51 gpm ismost nearly:
a) 35b) 40c) 55d) 60
D, 60
psif t
psif th
f th
hg
f tx
cfs
ghAC
Q
cfssgal
f tgalQ
C
f txxA
gQ
5931.2
136
136
)(2
)98.0(1052.8
00782.0
2
00782.060
min
48.7min
51.3
98.0
1052.82
2
25
3
25
2
128
1
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Irrigation
Which of the following statements is NOT truefor installation of thrust blocking on irrigationpiping with rubber gasket joints?
a)Thrust blocking is required where the pipechanges size.
b)Thrust blocking is required where the pipechanges slope.
c)Thrust blocking is required where there is an in-line valve.
d)Thrust blocking is required at the end of thepipeline.
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Irrigation
This is an obvious standards question.
Use ASABE standards to solve. This is
located in the installation section of the
standard, Design, Installation, andPerformance of Underground
Thermoplastic Irrigation Pipelines S376
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Irrigation
Which of the following statements is NOT truefor installation of thrust blocking on irrigationpiping with rubber gasket joints?
a)Thrust blocking is required where the pipechanges size.
b)Thrust blocking is required where the pipechanges slope.
c)Thrust blocking is required where there is an in-line valve.
d)Thrust blocking is required at the end of thepipeline.
Probably Soil Physics but I
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Probably Soil Physics but I
dreamt this one up
If the soil material is used for liner for a swine
lagoon and the soil is highly calcarious and is
classified as a CL (Unified Soil Classification
System) soil. Which soil amendment would bestcost effectively decrease the permeability of the
soil:
a)Soda Ash (NaCO3)
b)Bentonitec)Poly Acrylamided)All of the above
Probably Soil Physics but I
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Probably Soil Physics but I
dreamt this one up
If the soil material is used for liner for a swine
lagoon and the soil is highly calcarious and is
classified as a CL (Unified Soil Classification
System) soil. Which soil amendment would bestcost effectively decrease the permeability of the
soil:
a)Soda Ash (NaCO3)
b)Bentonitec)Poly Acrylamided)All of the above
A
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Challenge Question
The maximum liquid operating level in a waste storagepond is elevation 1212.0 feet. The bottom of the wastestorage pond is at elevation 1200.0 feet and has 4:1 side-slopes. The pond has a storage capacity of 1,000,000gallons. A soil liner will be used to minimize seepage from
the waste storage pond. The hydraulic conductivity of thesoil liner material is 1.9 X 10-7 cm/s. The maximumallowable seepage rate is 0.25 inches/day. The thickness ofthe soil liner in inches required in the bottom of the pond ismost nearly:
A.4
B.6
C.12D.18
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Do you remember Darcys Law?
kv
Hkh
v
h
hHkv
)(
,Rearranged
(L)knessliner thicsoilh
(L)(pressure)headorgradientH
(L/T)tyConductiviHydraulick
(L/T)dischargespecific
)(
hi 24i6060
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dyin
scm
dy
hr
hr
s
cm
inx 0065.0
24min60
min
60
54.2109.1 7
kv
kHd
Answer D, USDANRCS National
Engineering HandbookPart 651
Agricultural Waste Management Field
Handbook, Appendix 10D-
Geotechnical, Design, and
Construction Guidelines
inches
ftxft
inx
ddy
indy
in
dyin
8.30065.025.0
12120065.0
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The End
A Big Applause for PEI (Professional
Engineering Institute) for the financial support
by its members for this review session and the
other volunteer efforts of ASABE to supportlicensure.
Special thanks to Rod for organizing this review
effort