Irrigation Review Session

7/27/2019 Irrigation Review Session

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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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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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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






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






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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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



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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

[email protected]

Irrigation Review Session

Documents

Transcript of Irrigation Review Session