• TABLE OF CONTENTS
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 Front Cover
 Foreword
 Abstract
 Main
 Appendix






Group Title: Economic Information Report - University of Florida Institute of Food and Agricultural Sciences ; 157
Title: A user's manual for the FARM Systems Lab irrigation cost generator
CITATION THUMBNAILS PAGE IMAGE ZOOMABLE PAGE TEXT
Full Citation
STANDARD VIEW MARC VIEW
Permanent Link: http://ufdc.ufl.edu/UF00026496/00001
 Material Information
Title: A user's manual for the FARM Systems Lab irrigation cost generator
Series Title: Economic information report
Alternate Title: FARM Systems Lab irrigation cost generator
Physical Description: ii p., 47 leaves : forms ; 28 cm.
Language: English
Creator: d'Almada, Philip J., 1953-
Lynne, Gary D
Smajstrla, A. G ( Allen George )
Florida Agricultural and Resource Management Systems Laboratory
Publisher: Food and Resource Economics Dept., University of Florida
Place of Publication: Gainesville Fla
Publication Date: 1982
 Subjects
Subject: Irrigation farming -- Economic aspects -- Computer simulation -- Florida   ( lcsh )
Irrigation farming -- Cost of operation -- Computer simulation -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: Philip J. d'Almada, Gary D. Lynne, Allen G. Smajstrla.
General Note: Cover title.
General Note: "January 1982."
Funding: This collection includes items related to Florida’s environments, ecosystems, and species. It includes the subcollections of Florida Cooperative Fish and Wildlife Research Unit project documents, the Sea Grant technical series, the Florida Geological Survey series, the Coastal Engineering Department series, the Howard T. Odum Center for Wetland technical reports, and other entities devoted to the study and preservation of Florida's natural resources.
 Record Information
Bibliographic ID: UF00026496
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: aleph - 001598331
oclc - 21062362
notis - AHM2473

Table of Contents
    Front Cover
        Front Cover
    Foreword
        Page i
    Abstract
        Page ii
    Main
        Page 1
        Page 2
        Page 3
        Page 4
        Page 5
        Page 6
        Page 7
        Page 8
        Page 9
        Page 10
        Page 11
        Page 12
        Page 13
        Page 14
        Page 15
        Page 16
        Page 17
    Appendix
        Page 19
        Page 20
        Page 21
        Page 22
        Page 23
        Page 24
        Page 25
        Page 26
        Page 27
        Page 28
        Page 29
        Page 30
        Page 31
        Page 32
        Page 33
        Page 34
        Page 35
        Page 36
        Page 37
        Page 38
        Page 39
        Page 40
        Page 41
        Page 42
        Page 43
        Page 44
        Page 45
        Page 46
        Page 47
Full Text

Philip J. d'Almada


Gary D.
Allen G.


Lynne


Economic Information
Report 157


Smajstrla


A User's Manual for the


FARM


Systems


Lab Irrigation


Cost


Generator


'.ff\Y 1 U8


?- _- '1. __ fF'TYI1rk,"


Food and Resource Economics Department
Agricultural Experiment Stations and
Cooperative Extension Service
Institute of Food and Agricultural Sciences
University of Florida, Gainesville 32611


January 1982






















FOREWORD


The "Irrigation Cost Generator" is offered for use by the Florida
Agricultural and Resource Management (FARM) Systems Laboratory in co-
operation with the Department of Agricultural Engineering. The FARM
Systems Laboratory is an integral component of the Food and Resource
Economics Department. Both the Agricultural Engineering and Food and
Resource Economics Departments are in the Institute of Food and Agricul-
tural Sciences (IFAS) at the University of Florida.

The ICG was acquired from Oklahoma State University in 1979, and
subsequently modified to suit Florida conditions. As a result, this
User's Manual draws heavily on a similar manual developed by Kletke,
Harris, and Mapp (1978) at Oklahoma State.

Input forms are available for the individual desiring to use the
cost generator. These forms can be obtained from, then returned to, the
FARM Systems Laboratory, as follows:

Marcia Tilley
FARM Systems Laboratory
Food and Resource Economics
1157 McCarty Hall
University of Florida
Gainesville, Florida 32611.

Also, for any questions regarding the use of the Irrigation Cost Gen-
erator, M. Tilley can be called at (904) 392-5185.























ABSTRACT


This manual illustrates the components of the Irrigation Cost
Generator (ICG), and shows how the default values of the ICG can be
altered in order to better represent the irrigation systems) of the
user. Included are descriptions on the use of the input form, and the
characteristics of the tables or arrays of the machinery complement. A
description of typical output formats is followed by glossaries of terms
used on the input forms and output formats.

Key Words: Irrigation costs, irrigation system costs, water supply
costs.

















A USER'S MANUAL FOR THE FARM SYSTEMS
LAB IRRIGATION COST GENERATOR

Philip J. d'Almada, Gary D. Lynne, and Allen G. Smajstrla

INTRODUCTION

The Irrigation Cost Generator (ICG) is a computer program which
calculates fixed and variable costs per acre-inch, per acre, and for the
entire system using various assumptions regarding the irrigation well
and pump, fuel source, distribution system, prices and costs, and water
demands. The user can specify the features of the system or use the
input default values and complement data base internal to the program.
Detailed output is provided on the physical and financial features of
the system being examined.

The ICG is flexible and can be used to provide information
regarding:
(1) the decision to invest in a system. That is, the ICG can provide
estimates of seasonal cost and initial investment requirements for
alternative system types, designs, and operating plans;
(2) the decision to add another acre-inch of water within a season
given that a particular system is in use. That is, the ICG can
provide estimates of the additional or marginal costs of adding
another acre-inch of water, given changing conditions such as
weather and/or prices for labor, fuel, materials and/or machinery.

The user enters information to the ICG through input forms, as
described in the next section. As noted above, input default values are
provided internally to the program for those specifications not provided
by the user. These default data are of three (3) general types:
(1) physical features of the farm, well, and area;
(2) machinery features, included mainly in the "machinery complement"
for the program;




PHILIP J. D'ALMADA is a research associate and GARY D. LYNNE is an
associate professor in the Food and Resource Economics Department.
ALLEN G. SMAJSTRLA is an assistant professor in the Agricultural
Engineering Department.










(3) financial features, including prices and costs.
Any and all of these data may be changed by the user. The values cur-
rently in the program (and thus the terminology "default" values) cha-
racterize a typical North Florida irrigation system in terms of farm,
well, pump, engine and distribution systems. Price and cost data are
those which are typical in the said area at the time of development of
this manual. These data are modified periodically. The latest informa-
tion regarding the status of these modifications can be determined by
contacting the FARM Systems Lab.

The purposes of this manual are:
(1) to describe the input forms and to show users either how to input
their own system features, or how to use the "default" values;
(2) to describe the output formats which are returned to the user.
The input form and output formats for the center-pivot system are dis-
cussed in the following sections. Input forms are provided for both the
center-pivot and traveling gun systems in Appendix A. The user should
contact the FARM Systems Lab for information on other systems for which
the ICG is being developed. Also, additional input forms can be obtain-
ed from the Lab.

INPUT FORM

The simplest case is discussed first, where the user finds the
machinery complement data descriptive and wishes to make changes only in
the physical features and some of the financial coefficients.

I. Machinery Complement Unchanged

The following (hypothetical) case can serve to illustrate. Con-
sider the user who desires to evaluate the costs of a center-pivot
system which is "typical" in the sense of the type and cost of
machinery. Let this sample user desire to have the following conditions
apply:
(1) application of 10 inches of water this year and 9 inches per year
over the longer term (i.e., on the average);
(2) interest rate on capital invested of .14 (14 percent);
(3) depth of the well of'250 feet with a pumping depth to water of 60
feet;
(4) pumping rate of 900 gallons per minute;
(5) power unit situated at 100 feet above sea level;
(6) cost of diesel fuel at $1.30 per gallon.

The sample input form (Illustration 1) is shown on pages 3 and 4.
On Line I, our sample user enters '4' for the ICG to access the default
values of the center-pivot system. The user, next, "identifies" his set
of entries on two lines--Line II. For instance, the user may choose to
put his name on the first line and the date and/or type of irrigation
system on the second line. Each of these two lines, however, is limited
to 40 spaces, including blanks.











Naln ddesDt


INPUT FORM: CENTER-PIVOT SYSTEM


Default System 4 (1): 4


THE FARH


(BASE)
Acres irrigated
Inches/acre this year
Average inches/acre/year
Average inches applied per application
Interest rate (xlOO )
Insurance rate (xlOO %)
Labor cost (S/hour)


THE WELL


Depth of well (feet)
Pumping depth of water (feet)
Depth of well-casing (feet)
Well life (years)


Default Value


New Vdlue


132.00 ( 1)
7.00 ( 2) 10.0
7.00 .(67) 9.0
1.00 ( 3)
0.12 (21) 0.14
0.006 (22)
4.00 (23)



400.00 (6) 250.0
50.00 (7) 60.0
100.00 (68)
40.00 (27)


THE PUMP


Depth setting of column pipe (feet)
Row number from column pipe and shaft array
Number of stages (If 0, the program will determine)
Gallons/minute produced by the pump
Pressure (psi) at the pivot
Pump efficiency (xlO0 %)
Stage life (years)
Column life (years)
Gearhead life (years)



Optional units (0Ono, 1-yes): Flow meter
Gate valve
Y-strainer
Check valve


'70.00
6.00
0.00
1000.00
75.00
0.75
12.00
15.00
15.00


THE CONTROL HEAD


THE*ENGINE
Fuel type (1LP, 3Jdiesel, electric)
Engine type (l*auto, 2*light Ind., 3-inter. Ind., 4-electric)
Row number from engine array (if 0, the program will determine)
Altitude above sea level (feet)
Maximt~ average daily temperature (OF)
Use of heat exchanger (engine types 1, 2j or 3)(0.no, 1-yes)
Type of drive (0-direct, l.right angle, 2-Vee-belt, 3-flat belt)
Fuel cost (S/gal or I/KWH)
Lubricant cost ($I/al)
Electric motor life (hours)
Automotive engine life (hours)
Light ind. engine life (hours)
Inter. Ind. engine life (hours)


3.00
2.00
0.00
150.00
90.00
0.00
1.00
1.20
7.00
50,000.00
20,000.00
30,000.00
40,000.00


( 9)
(10)
(11)
(4) 900.Q
( 5).
(12)
(28)
(29)
(30)



(71)
(72)
(73)
(74)



(13)
(14)
(15)
(16) 100.0
(17)
(18)
(20)
(31) 1.30
(32)
(35)
(36)
(37)
(38)
Continued


Illustration 1. Center-pivot input form of the sample user


---


Mailing Address


Date


Identification (II):









4
THE pISTRIABPlOM SYSTEM
De
Lateral length (feet)
Pressure loss allowed in pipe (psi/1000 feet)
Main line type (1.above ground, 2-below ground)
Main line length (feet)
Row number from pipe array
Option to Increase main line pipe size, if needed (O-yes, 1-no)


fault Value
1,353.00'
11.00
2.00
10.00
43.00
1.00


New Value
(41)
(39)
(42)
(43)
(44)
(45)


(9999)
Optional listing of the machinery complement: Yes No
(KAXO)




MACHINERY COMPLEMENT CHANGES


(FILE)
Array Item Row Number Column Number


New Value


(9999)*' .
(ENO*)
EXECC)


Illustration 1, Center-pivot input form of the sample user--Continued


--










The first section is titled "THE FARM." For our user, the value
for "Inches/acre this year" (Line 2) is changed to 10.0 and the "Average
inches/acre/year" (Line 67) is set at 9.0. The "Interest rate" (Line
21) is changed from 0.12 to 0.14. The "default" values of 132 acres
irrigated (Line 1), 1.0 inch applied per application (Line 3),.6 percent
insurance rate, and $4.00 per hour for labor, are assumed descriptive.

Changes in THE WELL section are made to reflect 250 feet of well
depth (Line 6) and an average pumping depth of 60 feet (Line 7).

In THE PUMP section, the only change is for 900.0 gallons per
minute produced by the pump (Line 4). The user should note that 75 psi
at the pivot 'is the default value for a high-pressure system. For a
low-pressure system (e.g., 40 psi), the user should enter the desired
pressure level on Line 5.

There are no changes in THE CONTROL HEAD section.

The only changes in THE ENGINE section are the altitude (to 100
feet, Line 16) and the diesel fuel price (to $1.30, Line 31).

No changes are made' in THE DISTRIBUTION SYSTEM section (p. 4),
since our sample user's conditions match the conditions set by the
default values.

If the user is interested in a traveling gun system, the appro-
priate form (Appendix A) should be secured. A '5' or '6', for a hose-
tow traveler or a cable-tow traveler, respectively, should be entered in
Line I. Any other changes are made in the manner described above.

In order to better understand each of the entries on the input
form, a glossary of terms and definitions is provided in Appendix C.

The user who does not plan to make any changes'in the machinery
complement can now go directly to page 12, where the section called
"OUTPUT FORMATS" shows the results from a computer analysis of the data
input on Illustration 1 (pp. 3-4).

II. Machinery Complement with Changes

It is expected that most users will wish to make changes in the
machinery complement, especially to prices and costs. Some of the
features of the machinery and some of the costs can be changed directly
on the input form (p. 3). For example, the user can specify the type of
drive and whether or not a heat exchanger is used (see THE ENGINE, p. 3,
Lines 20 and 18, respectively).

The input data in the machinery complement (Illustration 2) are
presented in twelve arrays on pages 6 to 8. (The first ten arrays apply
to all irrigation systems.) Specifically, these arrays contain data for
column pipe and shaft (CPS), gearhead (GEAR), pumpbase (PUMP), pump















MACHINERY COMPLEMENT


DEFAULT DATA RUN CENTER-PIVOT SYSTEM
SYSTEM 4 D EC. I. 1931


(CPS)


ROW/COL
20 FT 1
2
3
4
5
6
7
9
9
10
LC FT 11
12
13
14
15
16
17
1a
19
20


PIPE
DIAMETER
2
6.00
6.00
6.00
6.00
8.00
8.00
8.00
8.00
10.00
10.00
6.00i
6.00
6.00
6.00
8.00
8.00
8.00
8.00
10.00
10.00


SYSTEM TYPE
COMPLEMENT NJM~CR


COLUMN PIPE AND SHAFT DATA


TUnE
DIAMETER
3
1.50
2.00
2.50
2.50
2.00
2.50
3.00
3.00
2.50
3.00
1.50
2.00
2.50
2.50
2.00
2.50
3.00
3.00
2.50
3.00


SHAFT
DIAMETER
4
1.00
1.25
1.50
1.69
1.25
I 69
1.69
1.94
1.69
1.94
1.00
1.253
1.50
1.69
1.25
1.69
1.69
1.94
1.69
1.94


PIPE
LENGTH
5
20.00
20.00
20.00
20.00
20.00
20.00
20.00
20.00
20.00
20.00
10.00
10.00
10.00
10.00
10.00
10.00
10.00
10.00
10.00
10.00


LIST
PRICE
6
389.00
439.00
531.00
564.00
521.00
646.00
0.0
790.00
752.00
896.00
235.00
263.00
309.00
320.00
322.00
387.00
0.0
463.00
466.00
542.00


SHAFT
FRICTION
LOSS
7
0.67
0.91
1.41
1.77
0.91
1.77
1.77
2.26
1.77
2.26
0.67
0.91
1.41
1.77
0.91
1.77
1.77
2.26
1.77
2.26


STRAINER
COST
8
37.00
37.00
17.00
37.00
60.00
60.00
0.0
60.00
114.00
114.00
37.00
37.0,)
37.00
37.00
60.00
60.00
0.0
60.00
114.00
114.00


SUCTION
PIPE
COST
9
45.00
45.00
45.00
45.00
53.00
53.00
0.0
53.00
70.00
70.00
45.00
45.00
45.00
45.00
53.00
53.00
0.0
53.00
70.00
70.00


(GEAR)
<20 20-39
1 2
800.00 1095.00


I GEARHEAD COSTS
4Q-59 60-79 80-99 100-124 125-149
3 4 5 5 7
1315.00 1540.00 1635.00 1960.00 2520.00


150-199
8
2780.00


200-274 275-374 >374
9 10 11
6775.00 7000.00 7000.00


COST OF PUMPBASES


COLUMN PIPE DIAMETER 6-INCH
SHAFT DIAMETER <1.5
1
COST 630.00

STAGE )

PUMPRASE GALLONS SHAFT
SIZE /MINUTE SIZE
ROW/COL
6-INCH 203 1 ALL
400 2 ALL
600 3 ALL
8-INCH 800 4 ALL
1000 5 ALL
10-INCH 1200 6 ALL
1400 7 ALL
1603 8 ALL


6-INCH
>1.5
2
647.00


8-INCH
ALL
3
729.00


10-INCH
ALL
4
979.00


STAGE COSTS


FIRST
STAGE
I
529.00
599.00
599.00
991.00
991.00
1023.00
1023.00
102J300


ADDITIONAL
STAGE
2
189.00
270 00
270.00
432.00
432.00
471.00
471.00
471.00


Continued


Illustration 2. Arrays of the machinery complement


BRAKE HP

COST


(PUMP)

















ROW/COL

2
3
4
5
6


tCONT)

PIPE
DIAMETER
1
4.00
5.00
6.00
8.00
10.00
12.00


(PIPE)




ALUMINUM HIGH PRESSURE LINE








LAY-FLAT HOSE

PVC HARD HOSE



PLASTIC (PVC) PIPE


t
(DEVL)


ROW/CUL

2
3
4
5


FLOW
METER
2
350.00
400.00
450.00
550.00
650.00
800.00


CONTROL HEAD

GATE
VALVE
3
126.00
170.00
21t.00
340.00
527.00
767.00


Y-
STRAINER
4
179.00
0.0
339.00
569.00
0.0
0.0


PIPE.COSTS AND PARAMETERS


ROW/COL
21
22
23
24
25
26
27
23
29
30
31
32
33
36
37
33
39
40
41
42
43
44
45
46
47
48
49
so50



WELL
DIAMETER
1
4.00
6.00
13.00
10.00
12.00


TYPE
2
S.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
I.00
1.03
2.00
2.00
2.00
3.00
3.00
3.03
3.00
3.00
4.03
4.00
4.00
4.03
4.00
4.00
4. )0
4.00
4.00
5.00


DIAMETER
(INCHES)
3
1.50
2.00
3.00
4.00
5.00
6.00
8.00
0.0
0.0
0.0
3.00
4.13
4.50
3.00
3.50
3 .775
4.00
4.50
4.00
6.00
8.00
10.00
12.00
0.0
0.0
0.0
0.0
0.0


FRICTION
LOSS
CONSTANT
4
0.34
0.34
0.33
0.32
0.32
0.32
0.32
0.32
0.32
0.32
0.05

0.08
0.32
0.32
0.32
0.32
0.32
0.32
0.32
0.32
0.32
0.32
0.32
0.32
0.32
0.32
0.0


COST/
FOOT
5
0.0
1.00
1.25
2.12
2.72
3.43
5.96
0.0
0.0
0.0
4.00
6.50
7.25
2.64
3. 31
4.0'
4.75
5.63
1.01
2.29
3.73
5.33
8.00
0.0
0.0
0.0
0.0
0.0


WELL-DEVELOPMENT DATA

DRILLING CASING
COST/FT COST/FT
2 3
5.00 6.00
5.00 7.50
6.00 10.00
10.00 15.00
12.00 20.00


Continued


Illustration 2. Arrays of the machinery complement--Continued


CHECK
VALVE
5
103.00
147.00
194,00
347.00
567.00.
878.00




EXPECTED
LIFE
6
15.00
15.00
15.00
15.00
15.CO
15.00
15.00
15.00
15.01
15.03
10.00
10.00
10.00
10.00
10 00
10.00
10.00
1 0,00
20.00
20.00
20.00
20.00
20.00
20.00
20.00
20.00
20.00
.0 .-















ENGINE FIXED COST DATA


ELECTRIC
MOTOR
COST,
2 \
682.00
1198.00
2348.00
2982.00
3746.00
5015.00
5975.00
0.0
7358.00
0.0
0.0
0.0
0.0


CONTRHUO
PANEL
3
694.00
1214.00
1934.00
3260.00
5804.00
6128.00
6128.00
0.0
6572.00
0.0
0.0
0.0
0.0


LP
HORSE- MOTOR
POJER COST
4 5
0.0 0.0
0.0 0.0
0.0 0.0
85.00 6900.00
0.0 0.0
130.00 9900.00
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0


DIESEL
HORSE- MOTOR
POWER COST
8 9
28.50 3700.00
40.00 5300.00
60.00 6148.00
75.00 .7108.00
100.00 9500.00
0.0 0.0
150.00 12900.00
175.00 12900.00
200.00 12900.00
225.00 17800.00
250.00 17800.00
0.0 0.0
0.0 0.0


ENGINE VARIABLE COST DATA


LP
ROW/COL 1 2
UNITS FUEL/HORSEPOWER-HOUR *4 1 0.1120 0.0
GALLONS LUOR CANT/HORSEPOUWER-HOUR 2 0.0011 0.0
REPAIiS/BRAKE HP-HOUR 3 0.00208 0.0
LABOR ON ENGINE PER HOUR OF USE 4 0.0600 0.0
*4 LP.DIESEL FUEL UNITS : GALLONS
*4 ELECTRICITY UNITS : KWt
*ELECTRIC : REPAIRS/ANNUM


DIESEL
3
0.0780
0.0011
0.00247
0.0600


ELECTRIC
4
0.8660
0.0001
13.00000
0.0300


DISTRIBUTION SYSTEM DATA


ROW/COL 1
LIFE OF DIST. SYST. 1 0.0
RCPAIRS(SCE BELOW) 3 0.0
HOURS LAIOR/ACRE/IRRIGATION 4 0.0


2
0.0
0.0
0.0


3
0.0
0.0
0.0


CENTER-
PIVOT
4
15.00
0.05
0.0650


CENTER-PIVOT REPAIR COEF= REPAIRS/DIST.
ALL OTHER REPAIR COEF=REPAIRS/ACRE/YEAR


(CPDS)

ACRES COVERED
COST

(TGDS)

ACRES COVERED
ROW/COL
HOSE-TOW 1
CABLE-TOW 2


TRAVELING GUN
HOSE-TOW CABLE-TOW
5 6
15.00 15.00
6.50 6.50
0.0625 0.2503

SYST. VALUC/YEAR


COST OF CENTER-PIVOT DISTRIBUTION SYSTEMS

<40 40-70 71-105 106-132 133-160
1 2 3 4 5
20000.00 29000.00 29000.00 30000.00 37500.00


COST OF
<30
1
10000.00
4000.00


TRAVELING

30-50
2
10000.00
5000.00


GUN DISTRIBUTION SYSTEMS

51-70 71-90 91-110
3 4 5
1200J.00 14000.00 14000.00
6000.00 7000.00 8000.00


Illustration 2. Arrays of the machinery complement--Continued


HORSE-
POWER
i
20*00
40.00
60.00
75.00
103.00
125.30
150.00
0.0
200.00
0.0
0.0
0.0
0.0


ROW/COL
1
2
3
4
5
b
7
8
9
10
It
12
13

(MULT)


(VC4)


tENGI










stages (STGE), control head (CONT), distribution pipe (PIPE), well-
development (DEVL), fixed costs for the engine (ENGI), variable costs
for the engine (MULT), all distribution systems (VC4), center-pivot
distribution systems (CPDS) and traveling gun distribution systems
(TGDS). Each of these are discussed below. The method for changing any
value in these arrays follows this discussion.

A. Explanation of Arrays in the Machinery Complement

Column pipe and shaft data (CPS)

The user may select a row number from the CPS array (p. 6) and
insert that number on the input form (p. 3, Line 10) under THE PUMP.
The default row number is 6, meaning that a 20-foot section of an 8-inch
pipe, witch a 2.5-inch tube diameter, costing $646, etc. (see p. 6), is
used. The user could have, for example, entered '9' for a 10-inch
diameter pipe (see p. 6).

Gearhead costs (GEAR)

The appropriate gearhead is selected by the ICG based on the brake
horsepower computed from physical and mechanical features. If, for
example, the brake horsepower is greater than 150 but less than 200, the
ICG selects gearhead #8, costing $2,780 (see p. 6).

Cost of pumpbases (PUMP)

The pumpbase is selected by the ICG on the basis of what the user
selects for column pipe diameter. If, for example, the user entered '9'
(for a 10-inch column pipe) as the row number under THE PUMP (p. 3, Line
10), the ICG will select the 10-inch pumpbase #4, costing $979 (see p.
6).

Stage costs (STGE)

The user can specify the number of stages in THE PUMP section (p.
3, Line 11). If this is not specified (0 on Line 11), the ICG will
calculate the required number. For example, a 1,000-gallon-per-minute
requirement through an 8-inch column pipe, will use a $991 unit for the
first stage and $432 units for all subsequent stages (p. 6). The user
desiring 1,200 gpm (or less) through a 10-inch column pipe can expect
first and subsequent stage costs of $1,023 and $471, respectively (see
p. 6).

Control head (CONT)

The appropriate costs for the required units are based on column
pipe diameter. This latter size is controlled by the user through Line
10 (p. 3). For example, the ICG selects row 4 from the CONT array (p.
7) based on the default value of '6' on Line 10 for an 8-inch column
pipe. The user would incur a Y-strainer cost of $569 (see p. 7).










Pipe costs and parameters (PIPE)

The characteristics of the main line pipe of the distribution
system are specified through Line 44 (p. 4). The default value of 43
provides for an 8-inch PVC pipe at $3.73 per foot (see p. 7). The lay-
flat and PVC hard hoses (p. 7) are associated with the cable-tow and
hose-tow traveling gun systems, respectively.

Well-development data (DEVL)

The costs per foot for drilling and casing the well, are based on
well diameter. This latter is controlled by the user through Line 10
(p. 3), where the well diameter is one pipe size larger than the column
pipe used. Again, from a default value of '6', on Line 10, for an 8-
inch column pipe, the ICG selects row 4 from the DEVL array (p. 7). The
user would incur a drilling cost of $10.00 per foot, and a casing cost
of $15.00 per foot (see p. 7).

Engine fixed cost (ENGI) and variable cost (MULT) data

The features of the engine leading to a particular investment
requirement are presented in the ENGI array on page 8. The user speci-
fies the fuel and engine type on Lines 13 and 14 (p. 3); a particular
size of engine can be selected through Line 15 (p. 3) from the ENGI data
on page 8. For example, the user would enter '10' on Line 15 (p. 3) for
a 225-horsepower diesel engine costing $17,800 (p. 8: ENGI array). If
the user specifies 0.0 on Line 15 (p. 3), the ICG will determine the
appropriate size. The user should carefully check the entries in col-
umns 4,5,8, and 9 if a '1', '2', or '3' is entered on Line 14.

The factors affecting the operating costs of the engine are shown
in the MULT array (p. 8). Based on the specified fuel type (p. 3, Line
13), the appropriate values are used directly unless changes are made in
this array (as illustrated later).

Distribution system data (VC4)

The appropriate set of entries on the life expectancy of the dis-
tribution system (excluding the main line), the coefficients of repairs
cost and labor requirement, are identified by Line I (p. 3). The de-
fault entry of '4' accesses the set of entries pertaining to the center-
pivot irrigation system (see p. 8).

Cost of center-pivot (CPDS) and traveling gun (TGDS) distribution
systems

Based on the specified irrigation acreage on Line 1 (p. 3), the ICG
selects the cost of a distribution system. For example, a center-pivot
distribution system, sufficient for a tract in the range of 105 acres to
131 acres, costs $30,000 (see p. 8).










B. Changing of Values in the Machinery Complement


The user, as noted previously, can: 1) change some costs and prices
directly on the input form; 2) select various sizes of equipment in the
machinery complement by code numbers on the input form; and 3) change
values in the complement data. This latter process is discussed in this
section.

Space is provided on the back of the input form (p. 4), whereby the
user may enter new values for any current entry of any array of the
machinery complement. Referring to the complement on pages 6 to 8
(Illustration 2), each array entry is identified by a row number and a
column number. The arrays GEAR, PUMP and CPDS, however, each contain
only one row.


Now consider a case where the user wishes to
changes to the machinery complement:
Current Value


make the following

New Value


Cost of column pipe and shaft
(CPS: row 6, column 6)
Cost of gearhead (GEAR: column 8)
Cost of pumpbase (PUMP: column 2)
Cost of stages:
1st stage (STGE: row 5, column 1)
PVC pipe cost (PIPE: row 43, column 5)
PVC pipe life (PIPE: row 43, column 6)


$ 646.00 $ 770.00


2,780.00
647.00

991.00
3.73


20.00 yrs.


3,000.00
700.00

1,000.00
4.00


25.00 yrs.


Cost of engine (ENGI: row 11, column 9) $ 17,800.00


Labor on engine (MULT: row 4, column 3)
Life of center-pivot distribution system
(VC4: row 1, column 4)
Cost of center-pivot distribution system
(CPDS: column 4)


0.06


15.00 yrs.

$ 30,000.00 $


$ 20,000.00
0.10


20.00 yrs.


35,000.00


The user may fill in the back
follows:


Item
cost of column pipe and shaft
cost of gearhead
cost of pumpbase
cost of 1st stage
cost of PVC pipe
life of PVC pipe
cost of engine
labor on engine
life of distribution system
cost of distribution system


of the input form appropriately as


Row
Number
6
1
1
5
43
43
11
4
1
1


Column New
Number Value
6 770.00
8 3,000.00
2 700.00
1 1,000.00
5 4.00
6 25.00
9 20,000.00
3 0.10
4 20.00
4 35,000.00


Array
CPS
GEAR
PUMP
STGE
PIPE
PIPE
ENGI
MULT
VC4
CPDS











OUTPUT FORMATS

The user is provided with three types of output, namely, a
"message" page, followed by the physical/technical summary, then the
financial/economic summary. These are shown in Illustrations 3, 4, and
5, respectively.

The message page (p. 13) gives warnings and information to the user
as regards any options used or any problems discovered by the ICG. The
user should contact the FARM Systems Lab if there are questions in
interpretation of messages.

Much of the information on page 14 is simply summarized from that
which our sample user provided on the input form (Illustration 1; pp. 3-
4). In fact, each of the sections parallel those on the input form,
including summary information on THE FARM, THE WELL, THE PUMP, THE
ENGINE, THE CONTROL HEAD, and THE DISTRIBUTION SYSTEM. Some numbers on
page 14 are calculated by the ICG, such as water horsepower and con-
tinuous brake horsepower required (see THE ENGINE). A detailed
explanation/definition of each of these summary data is presented in
Appendix D.

The financial/economic data are provided on page 15. Costs are
separated into overall categories of seasonal variable, fixed and their
total costs, and initial investment costs. Variable costs are repre-
sented by fuel, lubricants, repairs, and labor per acre-inch per season
($/AI/S), per acre per season ($/AI/S), and per season ($/S). These
costs are given for each system component (Well, Pump, Motor or Engine,
Distribution) and for the entire system (Total) (see p. 15). The same
breakdown is used for the fixed costs, represented by depreciation,
taxes, insurance, and interest.

Investment requirements are included in the seasonal costs through
an assumption of using the system only on the tract of land specified
and for one harvest. Annualized costs are calculated on the basis of
the life of the system. Costs can also be estimated for the multiple
harvest case, or where the system is used on more than one tract. The
user should contact the FARM Systems Lab for details.

The initial total investment requirements per acre and per season
are also presented (p. 15). For our sample user, the initial investment
requirement is $395.18 per acre, or $52,164.30 in total.




INote that sales taxes are included in the purchase and initial
investment costs. There will not, generally, be any other taxes for the
traveling gun and center-pivot systems. However, this possiblility is
retained in the output formats because the ICG will soon be available
for systems where other taxes are relevant.











WARNING:DEPTII SETTInG OF COLUmN PIPE
DEPTH SITING ADJUSTED T3 80. FiET.


70. FEET) TOO SHALLOW.


Illustration 3. "Message" page output format for the sample user




















DEFAULT DATA RUN CENTER-PIVOT SYSTEM
SYSTEM 4 DEC. 1t 1931


HOURS OF OPERATION:
AVERAGE HCURS OPERATION:'
LABOR COST/HR:



WELL DEPTH:
WELL DIAM.:



GALLONS PER MINUTE:
DEPTH SETTING COL. PIPE:
0 EXTRA 10-FT SECTION:
H 20-FT SECTIONS:
COST PER 10-FT SECTION:
COST PER 20-FT SECTION:
COST OF COL. PIPE:
YEARS OF COL. LIFE:


663.67
597.JO
4.00



250.0
10.00



900.00
80.00
0
4.
387.00
646.00
2584.00
15.00


LIGHT INDUSTRIAL
DIESEL FUEL
ENGINE HAS ALT., AIR CLEANER
ENGINE HAS RADIATOR AND FAN
RIGHT-ANGLE DRIVE


COST OF GATE VALVE:
COST CF CHECK VALVE:


340.00
347.00


UNIVERSITY OF FLORIDA
S IRRIGATION COST PROGRAM

SYSTEM REQUIREMENTS.CHARACTERISTICS ,ANO COSTS


THE FARM
IRRIGATED ACRES: 132.00
TOTAL DYNAMIC HEAO: 233.39
INSURANCE RATE: 0.006
INTEREST RATE: C.14

THE WELL
OETH TO WATER LEVEL: 60.3
DE'TH OF WELL CASING: 100.00
YEARS OF WELL LIFE: 40.00

THE PUMP
PUMP EFFICIENCY: 0.75
NUMBER OF STAGES: 3
COST OF FIRST STAGE: 991.00
COST PER ADDITIONAL STAGE: 432.00
COST OF STAGES: 1855.03
STRAINER COST: 60.00
SUCTION PIPE COST: 53.00
YEARS OF STAGE LIFE: 12.00

THE ENGINE

ENGINE COST: 9500.03
FUEL COST/UNIT: 1.30
LUBRICANT COST/GAL: 7.03
HOURS OF ENGINE LIFE: 30000.
ALTITUDE: 100.00

THE CONTROL HEAD
COST OF FLOW METER: 550.00
COST OF Y-STRAINER: 569.00


THE DISTRIBUTION
MAIN LINE DELOW GROUND PIPE MATERIAL:
PIPE LENGTH: 10.00 PIPE COST/FOOT:
PIPE DIAMETER: 8.00 MAIN LINE COST:
FRICTION LOSS IN FT/1000 FT FOR MAIN LINE

TOTAL FRICTION LOSS IN PSI FOR MAIN LINE
PRESSURE IN PSI REQUIRED AT WELLHEAD AND DISCHARGE. RESPECTIVELY:


SYSTEM
PVC
3.73
37.30

13.85

0.06
75.06


INCHES APPLIED PER ACRE:
TOTAL ACRE-INCHES APPLIED:
INCHES PER APPLICATION:



DRILLING COST/F03T:
CASING COST/FOOT:
TOTAL WELL COST:


PRESSURE (PSI) AT DISCHARGE:
PIPE DIAMETER:
TUBE DIAMETER:
SHAFT DIAMETER:
GEAkHEAD COST:
PU~nASE COST:
TOTAL PUMP COST:
YEARS OF CEARfEAD LIFf:


DRIVE EFFICIENCY:
WATER HORSEPO3WR:
CONTINUOUS DRAKE HP REQUIRED:
CONTINUOUS DRAKE HP USED:
MAX. AVG. DAILY TEMP.:


TOTAL CONTROL HEAD COST:


LATERAL LENGTH:
COST OF DIST. SYST. PROPER:
LOSS ALLOWED (PSI/100OFT):




75.00


Illustration 4. Physical/technical output format for the sample user


CENTER-PIVOT SYSTEM


10.00
1320.00
1.00



10.00
15.00
4000.00


75.00
00
2.50
1.69
1540.00
729.00
6821.00
15.00


0.9?
53.04
75.40
100.00
90.00


1806.00



1353
30000.00
1 .00









SEASONAL CO ST S FO R I R R IGATI ON
PERFORMED ON 12/28/81

TYPE AND SY S T E M C O M P N E NTS
SOURCE OF
COSTS WELL PUMP MOTOR OR ENGINE DISTRIBUTION TOTAL

VARIABLE CCSTS
FUEL (STAI/S) 0.0 0.0 5.10 0.0 5.10
(S/A/SI 0.0 0.0 50.98 0.0 50.98
(S/S) 0.0 0.0 6729.56 0.0 6729.56
LUBRICANTS (s/AI/3) 0.0 0.0 '0.40 0.0 0.40
CS/A/S) 0.0 0.0 3.97 0.0 3.97
(S/S) 0.0 0.0 524.30 0.0 524.30
REPAIRS CS/AI/S) 0.0 0.06 0.12 t.26 1.44
(S/A/S) 0.0 0.57 1.24 12.63 14.44
(S/S) 0.0 75.45 163.93 1666.66 1906.04
LABOA (s/AI/S) 0.0 0.0 0.12 0.26 0.38
(S/A/S) 0.0 0.0 1.21 2.60 3.81
(S/S) 0.0 0.0 159.28 343.20 502.4A
SUBTCTAL IS/AI/S) 0.0 0.06 5.74 1.S2 7.32*
I(/A/S) 0.0 0.57 57.40 15.23 73.20
(S/S) 0.0 75.45 7577.05 2009.86 9662.36
FIXEC COSTS p-
Ul
DEPRECIATION (S/AI/S) 0.08 0.33 0.14 1.58 2.13
(S/A/S) 0.76 3.25 1.43 15.85 21.29
(S/S) 100.00 429.52 189.14 2092.16 2810.82
TAXES (s/AI/S) 0.0 0.0 0.0 0.0 0.0
(I/A/S) 0.0 0.0 0.0 0.0 0.0
(S/S) 0.0 0.0 0.0 0.0 0.0
INSURANCE (S/AI/SI 0.0 0.03 0.04 0.14 0.22
(S/A/S) 0.0 0.31 0.43 1.45 2.13
(s/S) 0.0 40.93 57.00 191.05 2"e.0
INTEREST (S/AI/S) 0.21 0.36 0.50 1.69 2.77
TC/A/S) 2.12 3.62 5.04 16.89 27.66
WS/S) 280.00 477.47 665.00 2229.03 3651.50
SUBTOTAL ($/AI/S) 0.29 0.72 0.69 3.42 5.11
(S/A/S) 2.88 7.18 6.90 34.18 51.l5
(S/S) 380.00 947.91 911.14 4512.25 671,l.30
TOTAL COSTS (S/At/S) 0.29 0.78 6.43 4.94 12.43
-------- (/A/S) 2.88 7.75 64.30 40.41 1.?4.35
(s/S) 380.00 1023.36 8488.20 5522.11 f16413. 57

INITIAL INVESTMENT(S/A) 30.30 51.67 71.97 241.24 395.18
-------) 4000.00 6821.00 9500.00 31843.30 52164.30

THIS IS ALSO THE ADDITIONAL OR MARGINAL COST OF APPLYING ONE MORE ACRE-INCH OF WATER. GIVEN PRICES SUBMITTED.
(S/AI/S) = OCLLARS PER ACRE-INCH PER SEASON
(S/A/S) = DOLLARS PER ACRE PER SEASON
(S/SI = DOLLARS PER SEASON


Illustration 5. Financial/economic output format for the sample user







16


The farmer, who already has a system installed, will be especially
concerned with the "subtotal" under variable costs as measured by the
$/AI/S value. This is an estimate of the additional or "marginal" cost
of adding one more acre-inch of water within a season. For our sample
user, it will be profitable to add one more acre-inch if the additional
or marginal value from crop production exceeds $7.32 (p. 15).

Sample output formats, showing an analysis of the input default
values for the cable-tow traveling gun system, appear in Appendix B.






17



REFERENCE LIST

Kletke, Darrel D., Thomas R. Harris, and Harry P. Mapp, Jr. Irrigation
Cost Program Users Reference Manual, Oklahoma State University.
Oklahoma Agr. Exp. Sta. Res. Rpt. P-770. Stillwater, OK: May 1978.


























APPENDIX A

INPUT FORMS





20










Mailing Address Date


INPUT FORM: CENTER-PIVOT SYSTEM


Default System 4 (1):


Identification (II):


THE FARM


(BASE)
Acres irrigated
Inches/acre this year
Average inches/acre/year
Average inches applied per application
Interest rate (xOO0 X%)
Insurance rate (xlOO X)
Labor cost ($/hour)


Default Value New Vdlue
132.00 .( 1)_
7.00 ( 2)
7.00 (67)
1.00 ( 3)
0.12 (21)
0.006 (22)
4.00 (23)


THE WELL


Depth of well (feet)
Pumping depth of water (feet)
Depth of well-casing (feet)
Well life (years)


THE PUMP


Depth setting of column pipe (feet)
Row number from column pipe and shaft array
Number of stages (if 0, the program will determine)
Gallons/minute produced by the pump
Pressure (psi) at the pivot
Pump efficiency (xl0O %)
Stage life (years)
Column life (years)
Gearhead life (years)


400.00
50.00
100.00
40.00


70.00
6.00
0.00
1000.00
75.00
0.75
12.00
15.00
15.00


THE CONTROL HEAD


Optional units (0*no, 1-yes): Flow meter
Gate valve
Y-strainer
Check valve


THE-ENGINE

Fuel type (I=LP, 3=diesel, 4-electric)
Engine type autot, 2-light Ind., 3linter. Ind., 4-electric)
Row number from engine array (if 0, the program will determine)
Altitude above sea level (feet)
Maximet* average daily temperature (OF)
Use of heat exchanger (engine types 1, 2, or 3)(0no, 1-yes)
Type of drive (O=direct, 1-right angle, 2-Vee-belt, 3*flat belt)
Fuel cost ($/gal or I/KWH)
Lubricant cost ($/gal)
Electric motor life (hours)
Automotive engine life (hours)
Light Ind. engine life (hours)
Inter. Ind. engine life (hours)


3.00
2.00
0.00
150.00
90.00
0.00
1.00
1.20
7.00
50,000.00
20.000.00
30,000.00
40,000.00


( 6)
( 7)
(68)
(27)


( 9)
(10)
(11)
( 4)
i 5).
(12)
(28)
(29)
(30)



(71)
(72)
(73)
(74)



(13)
(14)
(15)
(16)
(17)
(18)
(20)
(31)
(32)
(35)
(36)
(37)
(38)


Mailing Address


Date










THE DISTRIBUTION SYSTEM


Lateral length (feet)
Pressure loss allowed in pipe (psi/1000 feet)
Main line type (1-above ground, 2-below ground)
Main line length (feet)
Row number from pipe array
Option to increase main line pipe size, if needed (0-yes, 1-no)


Default Value
1,353.00'
11.00
2.00
10.00
43.00
1.00


New Value


(41)
(39)
(42)
(43)
(44)
(45)


(9999)
Optional listing of the machinery complement: Yes No
(MAXO)


MACHINERY COMPLEMENT CHANGES


(FILE)
Array


Row Number Column Number


New Value


(9999)'S
(END*)
EXECC)


"-













Mailing Address Date


INPUT FORM: TRAVELING GUN SYSTEM (HOSE-TOW OR CABLE-TOW)


Default System 6 (I):




(BASE)
Acres irrigated
Inches/acre this year
Average inches/acre/year
Average inches applied per application
Interest rate (xlOO %)
Insurance rate (x1OO %)
Labor cost (S/hour)


Identification (II):


THE FARM


Default Value New Value
90.00 ( 1)_
6.00 ( 2) ________
6.00 (67)
1.00 ( 3)_
0.12 (21)
0.006 (22)
4.00 (23)


THE WELL


Depth of well (feet)
Pumping depth of water (feet)
Depth of well-casing (feet)
Well life (years)


Depth setting of column pipe (feet)
Row number from column pipe and shaft array
Number of stages (if 0. the program will determine)
Gallons/minute produced by the pump
Pressure (psi) at the gun
Pump efficiency (xlO0 X)
Stage life (years)
Column life (years)
Gearhead life (years)


Optional units (Ono, 1-yes): Flow meter
Gate valve
Check valve


THE ENGINE
Fuel type (I=LP, 3-diesel, 4-electric)
Engine type (1.auto, 2-light ind., 3-inter. ind., 4-electric)
Row number from engine array (if 0, the program will determine)
Altitude above sea level (feet)
Maximum average daily temperature (OF)
Use of heat exchanger (engine types 1, 2, or 3)(0-no, l1yes)
Type of drive (0-direct, 1-right angle, 2*Vee-belt, 3-flat belt)
Fuel cost ($/gal or $/KW1I)
Lubricant cost (S/gal)
Electric motor life (hours)
Automotive engine life (hours)
Light ind. engine life (hours)
Inter. Ind. engine life (hours)


THE PUMP












THE CONTROL HEAD


400.00
S50.00
100.00
40.00

70.00
6.00
0.00
S00.00
100.00
0.75
12.00
15.00
15.00


( 6)
( 7)
(68)
(27)

( 9)
(10)
(11)
( 4)
( 5)
(12)_
(28)
(29)
(30)


1.00 (71)
1.00 (72)
1.00 (74)


3.00
2.00
0.00
150.00
90.00
0.00
1.00
1.20
7.00
50,000.00
20,000.00
30,000.00
40,000.00


(13) __
(14)
(15)
(16)
(17)
(10)
(20)
(31)
(32)
(35)
(36)
(37)
(30)


Mailing Address


Date


















Distance between sets (feet)
Pressure loss allowed in pipe (psi/1000 feet)
Cost of above ground valves (S/valve)
Cost of below ground valves (S/valve)


THE DISTRIBUTION SYSTEM
Default Value
300.00
11.00
125.00
150.00


New Value
(41)
(39)
(33)
(34)


Distribution Line: Section One Main Line
Line type (1labove ground, 2-below ground)
Line length (feet)
Row number from pipe array
Option to increase pipe size, if needed (O0yes, 1lno)


2.00
1060.00
42.00
1.00


Distribution Line: Section Two Flexible Hose
Line length (feet) 660.00
Row number from pipe array Hose-tow: 39.00; Cable-tow: 32.00
Option to increase pipe size, if needed (0-yes, 1-no) 1.00


Distribution Line: Section Three Alternate Main Line
Line type (6-above ground, 5-below ground, 7lthis section not used) 5.00
Line length (feet) 1060.00


(9999)
Optional listing of the machinery complement: Yes No
(MAXO)




MACHINERY.COMPLEMENT CHANGES


(FILE)
Array


Row flunrer Column Number


(9999)'5
(END*)
EXECC)


(42)
(43)
(44)
(45)



(48)
(49)
(50)



(52)
(53)


New Value


___


____~_i
____


_I_
~I ___ _
__ __


_I ____


-"--- ~-~-~--~---~



--CI-- --LII----


-_II


_---





--L


__
__~-


























APPENDIX B

OUTPUT FORMATS FOR TRAVELING GUN





26











LARGECRE LATERAL


PIPE RECOMMENDED FOR DISTRIBUTION LINESECTION 2 BUT NONE ALLOWED***















UNIVERSITY OF FLORIDA
IRRIGATION COST PROGRAM


TR. GUN:CAB.-TOW SYSTEM


SYSTEM REQUIREMENTSCHARACTERISTICS.AND COSTS


THE FARM
HOURS OF OPERATION: 488.70 IRRIGATED ACRES: 90.00
AVERAGE HOURS OPERATION: 488.70 TOTAL DYNAMIC HEAD: 315.00
LABOR COST/HR: 4.00 INSURANCE RATE: 0.006
INTEREST RATE: 0.12

THE WELL
WELL DEPTH: 400.0 ?EPTI TO WATER LEVEL: 50.0
WELL DIAM.: 10.00 DEPTH OF WELL CASING: 100.00
YEARS OF WELL LIFE: 40.00
THE PUMP
GALLONS PEP MINUTE: 500.00 PUMP EFFICIENCY: 0.75
DEPTH SETTING COL. PIPE: 70.00 NU4MER OF STAGES: 7
N EXTRA 10-FT SECTION: I COST OF FIRST STAGE: 991.00
S20a-FT SECTIONS: 3 COST PER ADDITIONAL STAGE: 432.00
COST PER 10-FT SECTION: 307.00 COST OF STAGES: 3533.00
COST PER 20-FT SECTION: 646.00 STRAINER COST: 60.00
COST CF COL. PIPE: 2325.00 SUCTION PIPE COST: 53.00
YEARS OF COL. LIFE: 15.00 YEARS OF STA.G LiFE: 12.00

THE ENGINE
LIGHT INDUSTRIAL ENGINE COST: 61i4a.8.
DIESEL FUEL FUEL COST/UNIT: 1.20
ENGINE HAS ALT., AIR CLEANER LUBRICANT COST/GAL: 7.00
ENGINE HAS RADIATOR AND FAN HOURS OF ENGINE LIFE: 30000.
RIGHT-ANGLE DRIVE ALTITUDE: 150.00

THE CONTROL HEAD
COST OF GATE VALVE: 340.00 COST OF FLOW METER: 550.00
COST CF CHECK VALVE: 347.00 COST OF Y-STRAINER: 0.0

THE DISTRIBUTION SYSTEM
DISTANCE BETWEEN SETS: 300 COST PER DELOW GROUND VALVE: 150.00
4 OF SCLOW GROUND VALVES: 8.00 COST OF VALVES: 1200.00

SECTION ONE SECTION TWO
MAIN LINE BELOW GROUND FLEXIBLE HOSE
PIPE LENGTH: 1060.00 HOSE LENGTH: 660.00
PIPE DIAMETER: 6.00 HOSE DIAMETER: 4.13
PIPE MATERIAL: PVC HOSE TYPE: LAY-FLAT
PIPE CCST/FOOT: 2.29 HOSE COST/FOOT: 6.50
CAIN LINE COST: 4854.80 HOSE COST: 4290.00
FRICTION LOSS IN FT/1000 FT FOR MAIN LINE AND HOSE. RESPECTIVELY: 18.5
TOTAL FRICTION LUSS IN PSI FOR MAIN LINE AND HOSE. RESPECTIVELY : 8.5
PRESSURE IN PSI REQUIRED AT WELLHEAD AND DISCHARGE. RESPECTIVELY: 114.7


INCHES APPLIED PER ACRE:
TOTAL ACRE-INCHES APPLIED:
INCHES PER APPLICATION:



DRILLING COST/FOOT:
CASING COST/FOOT:
TOTAL WELL COST:


PRESSURE (PSI) AT DISCHARGE:
PIPE DIAMETER:
TUBE DIAMETER:
SHAFT DIAMETER:
GEARHEAD COST:
PUMPBASE COST:
TOTAL PUMP COST:
YEARS OF GEARHEAD LIFE:


DRIVE EFFICIENCY:
WATER HORSEPOWER
CONTINUOUSS ERAK~E :-;, =Q'I:R
CONT:MJ.2'US BRAKE HP USE:
MAX. AVC. DAILY TEMP.:


TOTAL CONTROL HEAD COST:


G

2
2


6.00
540.00
1.00



10.00
15.00
5500.00


100.00
0.00
2.50
1.69
1315.00
729.00
8065.00
15.00


0.97
39.77
56_.2
60.OS
90.00


1237.00


LOSS ALLOWED (PSI/00OFT): t1.00
COST OF GUN.CART.REEL: 7000.00

SECTION THREE
ALTERNATE MAIN LINE GELOW GROUND
PIPE LENGTH: 1060.00
PIPE DIAMETER: 6.00
PIPE MATERIAL: PVC
PIPE COST/FOOT: 2.29

28.93
6.20
100.00


TRAVELLING GUN SYSTEM: CABLE-TOW
DEFAULT DATA DEC. 1. 1981.









SEASONAL CO ST S FOR IRRI GA T ON
PERFORMED ON 12/29/81
-------- ------ -- ------ ------------------- -------'------ -------"" "
TYPE AND S Y ST EM COM P ON E N T S
SOURCE OF
COSTS WELL PUMP MOTOR OR ENGINE DISTRIBUTION TOTAL


VARIAeLE COSTS

FUEL (S/Al/S)
CS/A/S)
($/4/s)
(s$/S)
LU3RICANTS (S/Al/S)
(S/A/S)
(C/S)

REPAIRS (S/AI/S)
(S/A/S)
(S/S1

LASCR (S/AI/s)
(S/A/S)
(s/S)
SUaTOTAL (S/AI/S)
(S/A/S)
(s/S)


0.0
0.0
0.0

0.0
0.0
0.0

0.12
0.73
65.69

0.0
0.0
0.0

0.12
0.73
65.69


5.08
30.49
2744.54
0.44
2.62
235.55
0.13
0.80
72.43
0.22
1.30
117.29

5.87
35.22
3169.80


0.0
0.0
0.0

0.0
0.0
0.0

1.08
6.50
585.00

1.00
6.00
540.00

2.08
12.50
t1125.00


5.08
30.49
2744.54

0.44
2.62
235.55

1.34
8.03
723.11

1.22
7.30
657.29

3.07*
48.45
4360.49


FIXED COSTS

DEPRECIATION (S/AI/S) 0.25 1.00
(S/A/S) 1.53 6.01
([/S) 137.50 541.25
TAXES (C/Al/S) 0.0 0.0
(S/A/S) 0.0 0.0
(S/S) 0.0 0.0
INSURANCE (S/AI/S) 0.0 0.09
(s/A/S) 0.0 0.54
(S/S) 0.0 48.39

tNTLREST (S/AI/S) 0.61 0.90
(S/A/S) 3.67 5.38
(S/S) 330.00 483.90
SU TlTAL ($/AI/S) 0.87 1.99
($/A/S) 5.19 11.93
($/3) 467.50 1073.54

TOTAL COSTS (S/AI/S). 0.87 2.11
(S/A/S) 5.19 12.66
(S/S) 467.50 I 39.23
INITIAL INVESTMENT(C/A) 61.11 89.61
--------- 5500.00 8065.00

0 THIS IS ALSO THE ADDITIONAL CR MARGINAL COST OF APPLYING ONE
(S/Ar/S) = DOLLARS PER ACRE-INCH PER SEASON
(S/A/S) = DOLLARS PER ACRE PER SEASON
(S/S) = DOLLARS PER SEASON


0.19 2.29
1.11 13.77
100.15 1239.11
0.0 0.0
0.0 0.0
0.0 0.0
0.07 0.21
0.41 1.24
36.89 111.49

0.68 2.06
4.10 t2.39
368.88 1114.91
0.94 4.57
5.62 27.39
505.92 2465.50

6.81 6.65
40.84 39.89
3675.72 3590.50

68.31 206.46
6148.00 18581.30

MORE ACRE-INCH OF WATER. GIVEN


3.74
22.42
2018.01
0.0
0.0
0.0
0.36
2.19
196.77

4.25
25.53
2297.69
8.36
50.14
4512.46

16.43
98.59
8872.95

425.50
38294.80

PRICES SUBMITTED.





30


























APPENDIX C

GLOSSARY OF TERMS
FOR THE INPUT FORMS





32







33


The Farm

Acres irrigated (1): Total number of acres which the described system
is to irrigate.

Inches/acre this year (2): Inches/acre to be applied in the current
year, or in the "short run".

Average inches/acre/year (67): The average number of acre-inches ap-
plied per acre per year to the acres noted in (1) above, in the
"long run".

Average inches applied per application (3): The number of inches/acre
applied in a single application.

Interest rate (21): A percentage interest charge which will be made on
the average capital investment on the well, pump, motor or engine,
and distribution system.

Insurance rate (22): The appropriate entry is the percentage that
annual insurance charges are of purchase value of the pump, motor or
engine, and distribution system.

Labor cost (23): This is the wage rate in dollars per hour for
irrigation labor.

The Well

Depth of well (6): The total depth, in feet, of the well when drilled,
rather than the column pipe depth or the pumping depth of water.

Pumping depth of water (7): This is the average number of feet water
must be lifted. This is deeper than the static water level but less
than the depth of the well.

Depth of well-casing (68): Depth, in feet, to which the well is to be
cased.

Well life (27): Life expectancy of the well, in years.

The Pump

Depth setting of column pipe (9): The number of feet of column pipe
required. The column pipe depth is a multiple of 10 feet and is
always adjusted to be at least 20 feet below the pumping depth of
water.

Row number from column pipe and shaft array (10): A row number is
selected from the CPS array. The row of the array most nearly
describing the column pipe in the well, or planned for the well,
should be selected. The array can be found on page 6.











Number of stages (if 0, the program will determine) (11): The proper
entry is the number of pump stages in the well. If no entry is
made, the program will compute the number of stages to deliver the
pressure specified on Line 5.

Gallons/minute produced by the pump (4): The average discharge rate for
the pump.

Pressure (psi) at the final opening (5): This is the pressure required
at the pivot for center-pivot systems and at the elbow of the gun
for traveling gun systems. The ICG operates for both high- and low-
pressure systems.

Pump efficiency (12): The effectiveness of the pump in delivering a
flow rate and an operating pressure to the irrigation system.
Typically, a new pump is 70 to 80 per cent efficient.

Stage life (28): Life expectancy of the stages or pump, in years.

Column life (29): Life expectancy of the column pipe, strainer and
suction pipe, in years.

Gearhead life (30): Life expectancy of the gearhead and pumpbase, in
years.

The Control Head

Optional units (O=no, l=yes) (71, 72, 73, 74): Optional use of each of
flow meter, gate valve, Y-strainer (for center-pivot) and check
valve.

The Engine

Fuel type (l=Liquefied Petroleum Gas, 3=Diesel, 4=Electricity) (13):
The fuel used by the system is specified by entering the appropriate
number.

Engine type (1=Automotive, 2=Light Industrial, 3=Intermediate
Industrial, 4=Electric) (14): Internal combustion engines, may be
specified by entering 1, 2, or 3; 4 for electric motor.

Row number from engine array (if 0, the program will determine) (15): A
row number from the ENGI array found on page 8 may be entered.
However, if the user wishes the program to select the proper engine
size from the array, no entry should be made. The selection is
based on pump and drive efficiencies.

Altitude above sea level (16): The altitude, in feet, of the power unit
above sea level.

Maximum average daily temperature (17): Average maximum temperature (F)
at the power unit during the hottest part of the irrigation year.










Use of heat exchanger (O=no, l=yes) (18): This is in order to replace
the radiator and fan with a heat exchanger to achieve greater
efficiency from an internal combustion engine.

Type of drive (20): Type of drive on the engine, such as direct, right-
angle gear, V-belt, or flat belt.

Fuel cost (31): The fuel charge for the fuel type specified on Line 13
should be entered. The appropriate units are dollars per gallon for
diesel fuel and LP gas, and dollars per kilowatt-hour (KWH) for
electricity.

Lubricant cost (32): This is the expected charge ($/gal) for lubricants
(oil) purchased to keep the system operating.

Electric motor life (35): Hours of life expected for an electric motor.

Automotive engine life (36): Hours of life expected for internal com-
bustion engines of the automotive type.

Light industrial engine life (37): Hours of life expected for internal
combustion engines of the light industrial type.

Intermediate industrial engine life (38): Hours of life expected for
internal combustion engines of the intermediate industrial type.

The Distribution System (for center-pivot)

Lateral length (41): This is the length, in feet, of the distribution
system proper, from the pivot point to the end gun.

Pressure loss allowed in pipe (PSI/1000 feet) (39): When the program is
allowed to adjust pipe size ['O' in Line 45], it will continue to do
so until the pressure loss per 1000 feet is less than the figure
entered.

Main line type (42): The two possible entries are:
1. above ground,
2. below ground.

Main line length (43): This is the length of main line, in feet.

Row number from pipe array (44): The desired pipe for the main line is
chosen from the PIPE array illustrated on page 7. The corresponding
row number of the desired pipe is entered in the blank.

Option to increase main line pipe size, if needed (0Oyes, l=no) (45):
The user can allow the ICG to increase, if necessary, the pipe size
of the main line due to friction loss criteria. Any increase de-
pends on the availability (in the PIPE array) of pipe of the type
(material) identified by Line 44 (see the PIPE array, Illustration











The Distribution System (for traveling gun--Appendix A)

Distance between sets (41): Distance, in feet, between valves on the
main line; or distance between hose connections to the main line, of
the distribution system proper.

Pressure loss allowed in pipe (PSI/1000 feet) (39): When the program is
allowed to adjust pipe size ['0' in Lines 45 and/or 50] it will
continue to do so until the pressure loss per 1000 feet is less than
the figure entered.

Cost of above ground valves (33): Cost of the type of valve to attach
to a main line lying above ground.

Cost of below ground valves (34): Cost of the type of valve to attach
to a main lying below ground.

The Distribution-Line Sections (One--Main Line, Two--Flexible Hose,
Three--Alternate Main Line) are discussed collectively since the cor-
responding entries are similar. At this point, the user is guided to
Srefer closely to the specified Line numbers and the Traveling Gun Input
Form (Appendix A).

Line type (l,6=above ground, 2,5=below ground, 7=this section not used)
(42, 52): Entries of '1' and '6' (or '2' and '5') describe the
location of the main line pipe (Line 42) and alternate main line
(Line 52), respectively. With such entries the program operates
with a centrally located pump in a rectangular field, and with only
one gun available. Consequently, there are two main lines attached
to the pump, of which one is in use while the other is idle, during
irrigation.

An entry of '7' (Line 52) enables the ICG to operate with a
peripheral pump and a single main line, i.e., no alternate main
line.

Line length (43, 48, 53): These are the lengths, in feet, of the main
line (Line 43), flexible hose (Line 48) and alternate main line
(Line 53).

Row number from pipe array (44, 49): The desired pipes for the main
line (Line 44) and hose (Line 49) are chosen from the PIPE array
illustrated on page 7. The corresponding row numbers of the desired
pipes are entered in the respective blanks. Generally, the hose is
smaller in diameter than the main liness.

Option to increase pipe size, if needed (0=yes, l=no) (45, 50): The
user can allow the ICG to increase, if necessary, the pipe size of
the main lines) (Line 45) and/or the hose (Line 50), due to
friction loss criteria. Any increase depends on the availability
(in the PIPE array) of pipes of the respective types (materials)
identified by Lines 44 and 49 (see the PIPE array, Illustration 2).


























APPENDIX D

GLOSSARY OF TERMS
FOR THE OUTPUT FORMATS





38










SYSTEM REQUIREMENTS, CHARACTERISTICS, AND COSTS

The Farm

Hours of operation: Short run operation based on current ("short run")
conditions of water application (Line 2) and pumping rate (Line 4).

Average hours operation: Long run operation based on average ("long
run") condition of water application (Line 67) and current ("short
run") condition of pumping rate (Line 4).

Labor cost per hour: Cost of labor specified on Line 23.

Irrigated acres: Total number of acres specified on Line 1.

Total dynamic head: Computed by the program. The total pressure, in
feet, to: (1) raise water to required level, (2) overcome friction
losses, (3) operate the distribution system.

Insurance rate: Insurance rate as entered on Line 22.

Interest rate: Interest rate as entered on Line 21.

Inches applied per acre: Number of inches applied this year as
specified on Line 2.

Total acre-inches applied: Computed by the program. The total volume
of water pumped this year, based on acres irrigated and inches of
water applied per acre this year.

Inches per application: Number of inches per application as supplied by
the user on Line 3.

The Well

Well depth: This is supplied by the user on Line 6. This is the total
depth of the well and is used to compute drilling costs.

Well diameter: This is computed as one pipe diameter greater than the
column pipe diameter.

Depth to water level: Average distance water must be lifted during
pumping. Controlled by the user on Line 7.

Depth of well casing: Depth of well casing specified on Line 68.

Years of well life: Expected life of the well as entered on Line 27.

Drilling cost per foot: Average cost per foot for drilling the well.
This depends on the well diameter. Comes from DEVL array.











Casing cost per foot: Average cost per foot for casing the well. This
depends on the well diameter. Comes from DEVL array.

Total well cost: This is the total cost of drilling and casing the
well.

The Pump

Gallons per minute: Gallons per minute to be pumped as specified on
Line 4.

Depth setting of column pipe: Supplied by the user on Line 9; this
depth is the length of column pipe inserted into the well to locate
the pump at least 20 feet below the average pumping depth of water.

# Extra 10-foot section: This will have a value of 0 or 1. If '0',
there is no need for an extra 10-foot section of column pipe. If
'1', an extra 10-foot section has been used.

# 20-foot section: This, at most, provides for 20 feet of column pipe
deeper than the pumping depth to water.

Cost per 10-foot section: This price of 10-foot column pipe section
comes from the CPS array. Controlled by the ICG as 10 rows in the
CPS array from the row number specified on Line 10.

Cost per 20-foot section: This price of 20-foot column pipe section
comes from the CPS array. Controlled by the user through Line 10.

Cost of column pipe: This is the total cost of all 20- and 10- foot
sections of pipe required for the column.

Years of column life: Life expectancy of the column pipe, strainer and
suction pipe as controlled by the user with Line 29.

Pump efficiency: Efficiency of pump as designated by the user on Line
12.

Number of stages: Set by user with Line 11 or computed by the program
if no entry is made. It is the number of pump stages used by the
system.

Cost of first stage: Comes directly from the STGE array of the
machinery complement. It is the cost of the first stage of the pump
assembly, which is sized on the basis of the pumping rate (Line 4)
and size of column pipe (Line 10).

Cost per additional stage: Cost of each additional stage required which
comes directly from the STGE array.


Cost of stages: Total cost of all stages used.












Strainer cost: Cost of the strainer located at the pump intake in the
well and needed by the system. Comes directly from the CPS array
and is set by the user through Line 10.

Suction pipe cost: Cost of suction pipe located below the pump in the
well and needed by the system. Comes directly from the CPS array
and is set by the user through Line 10.

Years of stage life: Expected life of the pump assembly as controlled
through Line 28.

Pressure (psi) at discharge: Irrigation system operating pressure as
specified on Line 5.

Pipe diameter: Diameter of the column pipe set by the user through Line
10. Comes from the CPS array.

Tube diameter: Diameter of the tube located in the column pipe to
protect the shaft. Set by the user through Line 10. Comes from the
CPS array.

Shaft diameter: Diameter of the shaft located in the column pipe for
operating the pump assembly. Set by the user through Line 10.
Comes from the CPS array.

Gearhead cost: Cost comes directly from the GEAR array and is selected
by the program based upon the nonderated continuous brake hourse-
power as computed by the program.

Pumpbase cost: Cost of the pumpbase, which is selected by the program
from the PUMP array using the column pipe diameter and shaft dia-
meter.

Total pump cost: Includes the cost of the column pipe, the stages or
pump assembly, the strainer, the suction pipe, the gearhead and the
pumpbase.

Years of gearhead life: Expected life of the gearhead and pumpbase
controlled by the user on Line 30.

The Engine

Engine or motor type: Indicates the results of the user-entry on Line
14.

Fuel type: Indicates the type of fuel to be used. Controlled by Line
13.

"Engine has Alt., Air Cleaner": This statement is not printed for
electric motors. The purchased internal combustion engine will have
an alternator and air cleaner.







42


"Engine has Radiator and Fan" or "Engine has Heat Exchanger":
Controlled by Line 18, either entry is printed only for internal
combustion engines. The purchased engine will have a radiator and
fan, but if a heat exchanger is used instead, then drive efficiency
will be increased to reflect an increased power unit efficiency.

Drive type: This is controlled by the user with Line 20.

Engine cost: Cost of the engine or motor selected. Comes directly from
the' ENGI array through Line 15. The user can allow the ICG to
select the appropriate engine size.

Fuel cost per unit: Price of a unit of fuel as specified by the user
using Line 31.

Lubricant cost per gallon: Cost of lubricants used in the system.
Controlled by the user on Line 32.

Hours of engine life: Hours of life for which the engine or motor can
be expected to operate. The user can alter this value by using
appropriately, Line 35, 36, 37, or 38.

Altitude: Altitude at which the power unit is operating. To reflect
changing altitudes, adjustment is made in engine efficiency for
internal combustion engines only. Controlled by the use of Line 16.

Drive efficiency: Assessed by the ICG using "drive type" information
from Line 20. Reflects mechanical losses associated with various
types of drives as opposed to a direct connection between the pump
.and power unit.

Water horsepower: Computed by the ICG based on the lift of water,
computed friction loss in the distribution system, irrigation system
operating pressure, and flow rate.

Continuous brake horsepower required: Computed by the program from
water horsepower, pump and drive efficiencies, and with corrections
for operating altitude and temperature. This is a continuous horse-
power requirement for a power unit with previously specified acces-
sories (Alt., Air Cleaner, and Radiator-Fan or Heat Exchanger).

Continuous brake horsepower used: If the user specifies, on Line 15,
which engine size is to be used, this entry is the horsepower speci-
fied in the ENGI array. The engine size specified may be larger or
smaller than required. If the program is allowed to select the
engine size, the entry found will always be the horsepower of the
first commercially available engine larger than the horsepower
printed as the "Brake Horsepower Required."

Maximum average daily temperature: Average maximum daily temperature
expected at the power unit. Adjustment is made in internal com-
bustion engine efficiency to reflect the temperature effect on
engine operation. This item is controlled using Line 17.










The Control Head

Cost of gate valve: The cost of a gate valve located by the well,
controlled by Line 72. Comes from the CONT array.

Cost of check valve: The cost of a check valve located by the well,
controlled by Line 74. Comes from the CONT array.

Cost of flow meter: The cost of a flow meter located by the well,
controlled by Line 71. Comes from the CONT array.

Cost of Y-strainer: The cost of a Y-strainer located by the well,
controlled by Line 73. Comes from the CONT array.

Total control head cost: The total cost of all units used (Lines 71 to
74) in the control head.

The Distribution System (for center-pivot)

Pipe description: This is identified as "Main Line Below Ground" or
"Main Line Above Ground". Specified by using Line 42.

Pipe length: Length, in feet, of the main line, controlled by Line 43.

Pipe diameter: Diameter, in inches, of the main line pipe used. Comes
directly from the PIPE array. Controlled by the use of Line 44.

Pipe material: The main line pipe types (materials) are specified in
the PIPE array using Line 44. The options are PVC and aluminum
pipe.

Pipe cost/foot: Cost per foot of main line pipe comes directly from the
PIPE array through Line 44.

Main line cost: Cost of all main line pipe used in the system. The
main line may be above ground or below ground.

Lateral length: Length of pipe (of the distribution system proper) from
the pivot to end gun. Controlled by Line 41.

Cost of distribution system proper: Cost of the lateral distribution
system for a center-pivot irrigation system. Comes directly from
the CPDS array. Controlled by the user with the number of acres
indicated on Line 1.

Loss allowed (PSI/1000 ft.): Maximum pressure loss allowed in main line
pipe. Controlled by Line 39.

Friction loss in feet/1000 ft. for main line: The actual friction loss
in the main line pipe is generated from the entries in "The Distri-
bution System" (Lines 42-45), and will not exceed 2.31 times the
value on Line 39.










Total friction loss in psi for main line: Friction loss in main line.
This value is derived from the value above and the length of the
main line pipe.

Pressure in psi required at wellhead and discharge, respectively: The
discharge or irrigation system operating pressure is controlled by
Line 5. This value, and to total friction loss (from above) between
the wellhead and the pivot point, gives the wellhead pressure.

The Distribution System (for traveling gun--Appendix B)

Distance between sets: Distance, in feet, between valves, controlled on
Line 41.

.# of valves: This would read "Above Ground" or "Below Ground" valves
depending on the location of the main line, and is the total number
of valves attached to the main line.

Cost per valve: Controlled by Line 33 for above ground valves, or by
Line 34 for below ground valves.

Cost of valves: Total cost of all valves used.

Loss allowed (PSI/1000 ft.): Maximum pressure loss allowed in all the
distribution pipe. Controlled by Line 39.

Cost of gun, cart, reel: Cost of the lateral distribution system for a
traveling gun irrigation system, excluding the cost of the flexible
hose. Comes directly from the TGDS array. Controlled by the user
with the number of acres indicated on Line 1 and the default system
identified on Line I.

The Distribution-Line Sections (One--Main Line, Two--Flexible Hose,
Three--Alternate Main Line) are discussed collectively since the cor-
responding terms are similar. The user should refer closely to the
output formats for the traveling gun (Appendix B).

Pipe description: This is identified as: (1) for Section One: "Main
Line Below Ground," or "Main Line Above Ground" and controlled by
Line 42; (2) for Section Two: "Flexible Hose"; (3) for Section
Three: "Alternate Main Line Above Ground," "Alternate Main Line
Below Ground," or "This Section Not Used" and controlled by Line 52.

Pipe or hose length: These lengths, in feet, afford irrigation of the
acreage on Line 1. Controlled by Line 43 for main line, Line 48 for
flexible hose, Line 53 for alternate main line.

Pipe or hose diameter: Measured in inches and comes from the PIPE
array. Controlled by Line 44 for main line and alternate main
line. Line 49 for flexible hose.

Pipe material or hose type: The types (materials) are specified in the
PIPE array. The PVC and aluminum pipe options are controlled by
Line 44 for main line and alternate main line. The lay-flat and PVC
hard hose options are controlled by Line 49 for flexible hose.










Pipe or hose cost/foot: Cost, in $/foot, comes from the PIPE array.
Controlled through Line 44 for main line and alternate main line.
Line 49 for flexible hose.

Main line or hose cost: Total cost of all main line pipe or hose used.

Friction loss in feet/1000 ft for main line and hose, respectively: The
actual friction losses in the operating main line pipe and hose are
generated from the entries in "The Distribution System" (Lines 42-
45, 48-50, respectively) and will each not exceed 2.31 times the
value on Line 39.

Total friction loss in psi for main line and hose, respectively: The
friction loss per operating main line and hose, derived from the
respective values above, and the corresponding pipe and hose
lengths.

Pressure in psi required at wellhead and discharge, respectively: The
discharge or irrigation system operating pressure is controlled by
Line 5. This value, added to total friction loss (from above)
between the wellhead and the elbow of the gun, gives the wellhead
pressure.


SEASONAL COSTS FOR IRRIGATION

To facilitate the estimation of costs for an irrigation system, the
integral parts are collected into four descriptive components. These
are: Well, Pump (including the column and suction pipes, the strainer,
the pump assembly, the gearhead and the pumpbase), Motor or Engine
(describing the power unit--either an electric motor or an internal
combustion engine), distribution (including the control head--flow
meter, gate valve, Y-strainer and/or check valve; the distribution
system--main line pipe, any valves, any hose, and the distribution
system proper).

All costs are specified as dollars per acre-inch per season
($/AI/S), dollars per acre per season ($/A/S), and dollars per season
($/S). In addition, initial investment requirements are specified in
dollars per acre ($/A) and total dollars ($). Each section is defined
as follows:

Variable Costs

Estimates of all those costs which vary during operation of the
irrigation system within a season. .There are no variable costs for
Well.

Fuel: Motor or Engine--based on continuous brake horsepower used, hours
of operation, cost of fuel, and a fuel consumption coefficient from
the MULT array. There are no fuel costs for Pump nor for Distri-
bution.











Lubricants: Motor or Engine--grease cost is based on hours of
operation, and a price of $0.02 per hour of operation; oil cost is
based on continuous brake horsepower used, hours of operation, cost
of lubricant, and a lubricant consumption coefficient from the MULT
array. There are no lubricant costs for Pump nor for Distribution.

Repairs: Pump--based on average investment, hours of operation, and
average hours of life. Motor or Engine--based on continuous brake
horsepower used, hours of operation, and a repairs cost coefficient
from the MULT array. Distribution--based on acreage irrigated (or
distribution system value for center-pivot), hours of operation,
average hours of operation, and a repairs cost coefficient from the
VC4 array.

Labor: Motor or Engine--based on hours of operation, cost of labor, and
a labor hours coefficient from the MULT array. Distribution--based
on acreage irrigated, number of water applications, cost of labor,
and a labor hours coefficient from the VC4 array. There are no
labor costs for Pump.

Subtotal: The total variable costs for each of the components, and for
their total. The latter $/AI/S value is the marginal cost of an
additional acre-inch of water within a season.

Fixed Costs

Estimates of all those costs which do not vary with the manner in which
the irrigation system is operated within a season.

Depreciation: Calculated by the straight-line depreciation method,
based on initial purchase costs and years of life (or hours of life
and average hours of operation for Motor or Engine).

Taxes: Always zero for center-pivot and traveling gun systems.
Includes property taxes for some types of systems.

Insurance: Protection from property damage and theft. Based on invest-
ment value and insurance rate. There is no insurance for Well.

Interest: Calculated under the assumption that payback is over the life
of the equipment, with equal principal payments per year. Based on
average investment value and interest rate.

Subtotal: Total fixed costs for each of the components, and for their
total. The latter values represent the costs incurred by the user
even if the irrigation system is not used within a season.







47


Total Costs

The sums of variable costs and fixed costs for each of the com-
ponents, and for their total. The latter values represent the best
estimate of costs incurred by the user within a season. Based on the
default values of the input form, the machinery complement and any
changes made to these values by the user.

Initial Investment

Estimates of initial equipment purchases and well-development cost.




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