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:: Online Reports ::
ITRC has provided
selected reports written by our staff for use online.
Below, the report titles and other information have been
provided. The hyperlink will take you to a
download link or a table of contents. The table of
contents lets you access individual chapters for reading
and printing. A step-by-step process to view the reports
has been provided below.
Directions for use:
- Is Acrobat Reader
installed on your system? (If so, proceed to 3)
- If not, you need to
download Acrobat Reader . . .
Click Here.
- Look below and find the
report that you would like to read.
- Click on the title of
that report.
- Click on the links to
the chapters that you would like to read or print.
Click here for a list of
the reports by
subject
or in alphabetical order.
Reports currently available online:
2008
ITRC Report No. R 08-001
Conversion to Groundwater Pumping
with Drip/Micro Irrigation
Twenty-one
irrigation districts in the Central Valley reported
"conversion acres". Conversion acres are those on
which farmers used only groundwater for drip/micro
irrigation although surface irrigation water was
available. The dominant factor that influences the
conversion was the lack of flexible water delivery
service to fields. The extra energy required for
groundwater pumping on the 73,000 conversion acres is
estimated at 76,000,000 kW-hr/yr.
Sponsor:
California Energy Commission
ITRC Report No. R 08-002
Irrigation District Energy
Survey
The purpose of
the survey was to establish a benchmark for the present
status of the pumping systems used by agricultural water
districts in California and to determine the districts'
needs. The needs discussed involve technical
assistance, research grant and low-interest loan
funding, and district-related policy issues. Thirty
agricultural water districts were selected for the
survey. These districts were selected based on energy
use per acre of irrigated area, size, geographic
location, and distribution infrastructure.
Sponsor:
California Energy Commission
2007
ITRC Report No. R 07-001
Flap Gate
ITRC began to investigate early designs of Flap Gates in
1992. Originating in Holland in the 1940s, the Flap Gate
is a simple, inexpensive hydraulic gate for automatic
upstream water level control. This report includes
information on design (the Microsoft Excel files available
for download), installation, maintenance, water
conservation and efficiency, cost, use, and benefits.
Sponsor:
California Energy Commission
2006
ITRC Report No. R 06-002
Volumetric
Water Pricing
This report discusses the concept of volumetric pricing
for irrigation water, separated into the following
sections: 1) The justification for paying volumetrically,
2) The challenge of charging volumetrically, 3)
Characteristics of volumetric charges and influencing
factors, 4) Examples of irrigation projects with
volumetric charges, and 5) A summary of necessary
conditions for volumetric billing.
ITRC Report No. R 06-003
Non-Standard
Structure Flow Measurement Evaluation Using the Flow
Rate Indexing Procedure - QIP
This report
details the proper installation and calibration techniques
for hydroacoustic meters. The calibration procedure
developed as part of this study is called the Flow Rate
Indexing Prcoedure (QIP). The QIP can be competed
by a professional technician with a boat-mounted Acoustic
Doppler Profiler (ADP) or a standard current meter.
Once the QIP has been used to properly calibrate a
hydroacoustic flow meter, the device can then measure and
record the flow rate and volume in a channel to within +/-
6% of actual values.
ITRC Report No. R 06-004
Electric
Motor Efficiency under Variable Frequencies and Loads
The primary
research objective of this study was to determine motor
efficiencies under varying speeds (induced by a VFD
controller) and loads. A broader objective was to
provide sufficient information to designers and economists
so that they could estimate total pumping plant power
usage with a VFD-controlled installation. Motors
were tested with VFDs as well as across-the-line.
2005
ITRC Report No. R 05-002
Canal Flow Rate Measurement
Guidelines - ITRC 2005: Hydroacoustic Meters
Hydroacoustic flow meters provide remote velocity sampling
and integrated flow measurement based on the physical
principle called the Doppler shift.
CEC
Agricultural Peak Load Reduction Program - Final Report
ITRC Report
No. R 05-003
The Agricultural Peak Load
Reduction Program (APLRP) was developed by the
California Energy Commission (CEC) in early June 2001,
under the authority of Section 5(b) of California Senate
Bill 5x. This legislation arose from the blackouts
and brownouts that hit the state of California during the
2000-2001 winter, caused by a severe imbalance in
electricity supply. The primary goal of SB 5x was to
reduce peak period electric demand throughout California.
As a result of this program, water agencies throughout
California exceeded expectations in regard to curtailing
peak load and were able to do this with
lower-than-expected funding.
Sponsor:
California Energy Commission
Tuning
Algorithms for Automated Canal Control
ITRC Report
No. R 05-005
Canal automation refers to
a closed-loop control in which a gate or pump changes
its position or running speed in response to a
measured water level, flow rate, or pressure because
that level, rate, or pressure is different than the
intended target value. This report provides a
clarification of theoretical principles behind canal
automation, as well as what ITRC has learned through
trial and error as we work to fine-tune the process.
Sponsor:
CSU/ARI
2004
ITRC Report No. R 04-001
Well Efficiency Class - Technical
Memorandum
ITRC conducted a well efficiency demonstration at Southern
California Edison AgTAC building in Tulare, California in
November 2003.
Sponsor:
Southern California Edison AgTAC
ITRC Report No. R 04-002
Power Quality - Measurement and
Conditioning Related to Variable Frequency Drives in
Irrigation Districts
ITRC completed a study to examine the quality of electric
power that supplies motors for irrigation pumps.
Sponsor:
California Energy Commission
ITRC Report No. R 04-003
Irrigation District Observations
on Large Diameter, Low Pressure Pipeline Materials
ITRC conducted a brainstorming session with
representatives from irrigation districts and engineering
firms to discuss replacement options for cast-in-place
pipelines.
Sponsor:
California Energy Commission
ITRC Report No. R 04-004
VFD (Variable Frequency Drive)
Specifications for Irrigation District Applications
This information was
compiled by ITRC under the Public Interest Energy Research
(PIER) End Use Agricultural Sector Program, administered
by the California Energy Commission, and includes
specifications for standards, warranties, submittals, VFD
size, and other technical details to aid districts in the
selection and implementation of VFD systems.
Replaces ITRC Report No. R 03-002
Sponsor:
California Energy Commission
ITRC Report No. R 04-005
Water
Level Sensor Testing
The findings presented here are the continuation of a
series of studies begun in 1998 to test water level
sensors under a variety of hydraulic conditions.
This report is intended as a supplement to ITRC Report
No. R 99-002, which describes the testing processes in
detail and presents detailed results for the first 17
sensors tested. The 2003 research, summarized in
this report, includes the testing of five new sensors.
Sponsor:
U.S. Bureau of Reclamation, Mid-Pacific Region
ITRC Report No. R 04-006
Water Level Sensor Testing Summary
This
is a summary brochure of the
findings presented in ITRC Reports No.
R 99-02 and
R
04-005, a series
of studies begun in 1998 to test water level sensors
under a variety of hydraulic conditions. This
document is intended as a quick reference and includes
the sensor selection guides and ratings tables from the
previous reports.
Sponsor:
U.S. Bureau of Reclamation, Mid-Pacific Region
2003
ITRC Report No. R 03-001
California
Crop and Soil Evapotranspiration
The goal of this publication is to provide water users,
consultants, water agency personnel, and others throughout
California with information that will: (a) help individual
water users with irrigation scheduling and system design
and (b) help agricultural water agency personnel with
water balances and future planning.
Sponsors:
California Dept. of Water Resources
California State University Agricultural Research
Initiative
ITRC Report No. R 03-003
Reclamation Leaching for Salinity
Buildup Under Drip/Micro Irrigation of Trees
ITRC conducted a reclamation leaching experiment in a
pistachio orchard to quantify the leaching water required
to remove salts from the effective root zone of trees.
This experiment tested a new reclamation leaching
technique - multiple lines of low-flow drip tape were used
to apply water to the area of salinity accumulation along
a tree row.
Sponsors:
California Dept. of Water Resources
California State University Agricultural Research
Initiative
ITRC Report No. R 03-004
Salinity Patterns on Row Crops
under Subsurface Drip Irrigation (SDI) on the Westside of
the San Joaquin Valley of California
The objectives of this study were to identify if there was
detrimental salinity buildup in the uppers layers of soil
caused by the usage of SDI on row crops, identify the
extent of any detrimental salinity buildup, and identify
successful and/or essential practices used by farmers who
use SDI.
Sponsors:
California Dept. of Water Resources
California State University Agricultural Research
Initiative
ITRC Report No. R 03-005
Soil Salinity Accumulation in
Orchards with Drip and Micro-spray Irrigation in Arid
Areas of California
A soil salinity accumulation study was conducted to examine
the long-term impact of drip and micro irrigation on
salinity build-up in orchards, focusing on the salinity
concentration pattern across a soil profile. The study
assessed the current level of salinity accumulation in
orchards irrigated with drip/micro systems and provided
information to support recommendations on the most
effective and efficient leaching techniques.
Sponsors:
California Dept. of Water Resources
California State University Agricultural Research
Initiative
ITRC Report No. R 03-006
California Agricultural Water
Electrical Energy Requirements - Final Report
ITRC conducted an analysis of the energy used to supply
water to California's agriculture and examined potential
future trends in the agriculture water community to
predict future energy requirements.
Sponsors:
California Energy Commission
California Institute for Energy Efficiency
ITRC Report No. R 03-007
Telog PR-31 Water Level Tracker
ITRC conducted a performance review of advanced electronic
water level measurement technologies in irrigation
applications. An example is the Telog PR-31 Level Tracker.
Sponsor:
U.S. Bureau of Reclamation, Mid-Pacific Region
ITRC Report No. R 03-008
ITRC Weir Stick
ITRC developed a new weir rule for open-channel flow rate
measurement.
Sponsor:
U.S. Bureau of Reclamation, Mid-Pacific Region
ITRC Report No. R 03-009
Government Highline Canal - A
Win-Win Solution
ITRC performed canal modernization on the Government
Highline Canal in the form of automated canal structures,
in-system storage, and new operational procedures that
could significantly reduce operational spill. Updated
July 2006
Sponsor:
U.S. Bureau of Reclamation, Upper Colorado Region, Western
Colorado Area Office
ITRC Report No. R 03-010
Underground Pipe Locating
Demonstration at Arvin-Edison Water Storage District
ITRC arranged an underground pipe locating demonstration/presentation
at the district in August 2003.
Sponsor:
U.S. Bureau of Reclamation, Mid-Pacific Region
ITRC Report No. R
03-011
Chemigation and Fertigation Basics
for California
This article answers basic questions about chemigation and
fertigation, including definitions, safety concerns,
general rules, and hints for fertigation systems.
Sponsor:
California Department of Pesticide
Regulation (CDPR)
2002
ITRC Report No. R 02-001
Evaporation from Irrigated
Agricultural Land in California
The intent of this research was to consolidate existing
information on evaporation through literature reviews and
interviews, and to compute evaporation amounts for
representative conditions in California and use those
amounts to extrapolate information for the complete
irrigated agricultural area of California. This research
was to address the question of the approximate magnitude
of evaporation - a key piece of knowledge when defining
the level of resources that should be committed to solving
any problem.
Sponsor:
CALFED
ITRC Report No. R 02-002
Side Mounted Doppler Flow Meter
for Canals
The Irrigation Training and Research Center has undertaken
a performance review of advanced electronic flow
measurement technologies in irrigation applications.
Sponsors:
U.S. Bureau of Reclamation
and
California Energy Commission
ITRC Report No. R 02-003
Infrared Inspection
Infrared thermography is the use of infrared radiation to
qualitatively and quantitatively express heat signatures
and heat differences. Infrared inspection can help
identify weak connections in an electrical box, uneven
heating of pump windings, overheating of bearings, and
many other possibly devastating problems well before any
failure occurs. The use of thermography as a preventative
tool can increase system reliability and efficiency.
Sponsor:
California Energy Commission
ITRC Report No. R 02-004
Doppler Flow Meters for Turnouts
Irrigation districts, farmers and other agricultural and
environmental water users need reliable and low-cost flow
meters with integrated dataloggers to measure water
velocity and depth with a high level of precision. The
Irrigation Training and Research Center has undertaken a
performance review of advanced electronic flow measurement
technologies in irrigation applications. Examples are the
Unidata STARFLOW and the MACE AgriFlo Ultrasonic Doppler
Meters.
Sponsors:
U.S. Bureau of Reclamation
and
California Energy Commission
ITRC Report No. R 02-005
Crop and Soil Evapotranspiration
for California
(Replaced by ITRC Report No. R 03-001)
ITRC Report No. R 02-006
Variable Frequency Drives and
SCADA - Are they worthwhile investments?
Managers and personnel from five California irrigation
districts were interviewed to determine if installing
variable frequency drives (VFD) and supervisory control
and data acquisition (SCADA) systems were worthwhile
investments.
Sponsor:
California Energy Commission
ITRC Report No. R 02-007
Benchmarking of Flexibility and
Needs 2002
Survey of Non-Federal Irrigation Districts
ITRC interviewed irrigation district personnel from 17
agricultural districts throughout California. Data were
analyzed to determine the degree of water delivery
flexibility provided to farmers and the extent of existing
and planned district modernization. This report did not
include irrigation districts with long-term federal
contracts.
Sponsor:
California Department of Water Resources
ITRC Report No. R 02-009
Variable Frequency Drives -
Planning your system
Many irrigation
districts are installing Variable Frequency Drives (VFDs)
to increase their level of service to their customers
and/or to reduce their energy consumption. This
brochure is intended to help irrigation districts properly
evaluate what type of VFD they need and how to install it.
Sponsor:
California Energy Commission
ITRC Report No. R 02-010
Basic Design of Replogle Flumes
To facilitate accurate
flow measurement, this paper describes specific design and
construction considerations applicable to Replogle flumes
in irrigation applications. A design example is
provided to illustrate these concepts.
Sponsor:
U.S. Bureau of Reclamation, Mid-Pacific Region
2001
ITRC Report No. R 01-001
Pumped Storage: Simple Changes -
Big Savings
Several California irrigation districts achieved savings
on electrical energy charges by implementing various types
of pumped storage systems. Pumped storage uses some type
of reservoir to store pumped water at a higher elevation
than the original water supply. During times of peak
statewide electricity demand, pumping is reduced while
water is withdrawn from the reservoir which acts as a
buffer.
Sponsor:
California Energy Commission
ITRC Report No. R 01-002
Load Monitoring System
Arvin-Edison Water Storage District received a loan - from
the CEC's loan program for the development of new energy
conservation technology - in 1995 to develop a program
with variable frequency drives. This report discusses the
design of the "Load Monitoring System", cost, the need for
such a system, initial start-up challenges, configuration
options, and benefits.
Sponsor:
California Energy Commission
ITRC Report No. R 01-004
Bottom Mounted Doppler Flow Meter
for Canals
Doppler technology, similar to that used by meteorologist
to track weather patterns, has been developed and expanded
to fill the need for advanced water flow measurement
technology that is relatively easy to use, applicable to
various hydraulic conditions, and very accurate. This
report discusses the operation of doppler units, provides
a comparison of the technology, benefits, cost, and use.
Sponsors:
U.S. Bureau of Reclamation
and
California Energy Commission
ITRC Report No. R 01-005
Adjustable Magnetic Coupler
Efficiency in terms of power consumption is vital and
continues to be increasingly important. The use of
adjustable speed pumps can reduce energy consumption and
improve controllability of pressure or flows. One such
technology, the MagnaDrive coupler, has been developed for
service in a variety of applications.
Sponsor:
California Energy Commission
ITRC Report No. R 01-006
Lookout vs. Intellution
Comparison
A systematic evaluation was performed on two Human Machine
Interface software packages (Lookout from National
Instruments and iFIX from Intellution). This was
accomplished with a simulated, automated water level
control system, using a Control Microsystems SCADAPack
PLC. Through the evaluation, Lookout clearly outperformed
iFIX in nearly all categories.
ITRC Report No. R 01-007
Irrigation Consumer Bill of Rights
Cal Poly ITRC, together with various irrigation industry
leaders and the Irrigation Dealers Association of
California, plus with assistance from the California
Energy Commission and Pacific Gas & Electric Co.,
developed the Irrigation Consumer Bill of Rightsâ„¢ (ICBRâ„¢)
in 1994.
ITRC Report No. R 01-008
Rapid Appraisal Process and
Benchmarking
The Rapid Appraisal Process (RAP) was documented by
Charles Burt and Stuart Styles in the Food and Agriculture
(FAO) publication Water Reports 19 - Modern Water Control
and Management Practices in Irrigation. ITRC Report R
01-008 provides an update of the spreadsheets used to
record field data. The spreadsheets now automatically
compute various internal and external indices and
summarize them. The recent IPTRID benchmarking indicators
are also computed. Links to all three of the documents
below are provided and must be downloaded for a complete
set.
- Rapid Appraisal Process and Benchmarking.doc (PDF
Document)
- Rapid Appraisal Process (RAP) and Benchmarking
BLANK.xls (EXCEL Document)
- Rapid Appraisal Process (RAP) and Benchmarking
EXAMPLE.xls (EXCEL Document)
ITRC Report No. R 01-009
Proceso de Evaluación Rápido
(RAP) y Comparación con el Patrón de Referencia
(Benchmarking)
Este documento explica el proceso del diagnóstico rápido
para proyectos de riego (sistemas de canales). El proceso
fue desarrolado por Drs. Charles Burt y Stuart Styles por
parte del Banco Mundial y el FAO. El documento explica una
programa en EXCEL. Tambien hay dos spreadsheets de EXCEL
abajo - uno blanco, y otro para un ejemplo del proceso de
diagnóstico rápido.
- Proceso de Evaluación Rápido (RAP) y Comparación con
el Patrón de Referencia (Benchmarking)
- RAP en Español -Blanco.xls (EXCEL Document)
- RAP en Español -Ejemplo.xls (EXCEL Document)
ITRC Report No. R 01-010
Remote Monitoring and Control -
System Set-Up
This SCADA report presents a basic step-by-step outline for
setting up and configuring a system for the remote
monitoring and control of equipment. For demonstration
purposes, it refers specifically to a system set up by
ITRC for testing water level sensors.
ITRC Report No. R 01-011
Evaluation and Modification of a
Float Valve for the Delano-Earlimart Irrigation District (DEID)
This report discusses the evaluation and modification of a
float valve for the Delano Earlimart Irrigation District (DEID).
The float valve is one part of the system that DEID uses
to meet growers' water needs. The float valve
assembly includes a frame, float, guide for the float,
linkage, and a butterfly valve. Preliminary tests
showed that waterhammer was evident at DEID and posed a
potential problem. After working with DEID and
making two modifications to the float valve, field tests
indicate that corrections made to the assembly improved
the operation and aids in the prevention of waterhammer.
2000
ITRC Report No. R 00-002
SCADA System Cost and Feature
Comparison
Supervisory Control and Data Acquisition (SCADA). Range of
options - from simple water level alarm to fully automated
control capability.
This report is no longer
available for download. The information is
distributed through ITRC SCADA workshops only.
ITRC Report No. R 00-004
Evaluation of Anti-fouling Paints
Algae and other growth on Replogle flumes, often used as
flow measurement devices in irrigation canals, can effect
the accuracy of measurements in those canals. Research was
conducted to find a product that would prevent buildup on
the flumes. Hard Anti-fouling paint, designed to be
applied to concrete rather than fiberglass, wood, steel or
iron, was the type of paint used in this study.
Replogle flume, Hard Anti-fouling paint, flow
measurement, irrigation canals, cuprous oxide
Sponsor:
USBR, Yuma Area Office
ITRC Report No. R 00-005
Benchmarking of Flexibility and
Needs 2000
Survey of Irrigation Districts
ITRC interviewed irrigation district personnel from 60
agricultural district representing approximately 91% of
the irrigated acreage within the U.S. Department of the
Interior Bureau of Reclamation's (USBR) Mid-Pacific
Region. The purpose of this Survey was to: identify the
extent of flexibility of water delivery presently offered
by irrigation and water districts to farmers; identify
educational programs in which districts currently
participate or have accomplished; and identify
improvements which can be made in regards to technology
and water conservation and what types of assistance
districts will require in the future to make those
improvements.
Sponsor:
USBR, Mid-Pacific Region
ITRC Report No. R 00-006
Actuators for Sluice Gates -
Alternatives to Commercially Available Products
Gate actuators provide a method of raising and lowering
canal gates using electric motors instead of human power.
ITRC has investigated four alternatives to commercially
available actuators designed specifically for the
operation of canal gates.
Canal gate actuator, sluice gate actuator, screw jack .
. .
Sponsors:USBR,
Mid-Pacific Region and
USBR, Yuma Area Office
1999
ITRC Report No. R 99-001
Simple, Portable Water Level
Monitoring Package
Supplemental report to "Water Level Sensor and Datalogger
Testing and Demonstration"
Covers the details necessary to to put together a simple,
portable water level monitoring package.
Sponsor:
USBR, Mid-Pacific Region
ITRC Report No. R 99-002
Water Level Sensor and Datalogger
Testing and Demonstration
Electronic water level sensing equipment is becoming
increasingly important for the implementation of water
conservation programs in irrigation districts. A need has
risen for information on costs, advantages/disadvantages,
required support equipment, and required maintenance for
the various options. ITRC conducted a yearlong study on
water level sensors and dataloggers and produced this
report.
Sponsor:
USBR, Mid-Pacific Region
ITRC Report No. R 99-003
Managing District Data Needs -
Narrowing in on a Moving Target
Ditchriders in San Luis Water District, Panoche Water
District, Delano-Earlimart Irrigation District, Westside
Water District, glide-Kanawha Water District, and Central
California Irrigation district use or are beginning to use
hand held data recorders (HHDR) to gather field
information.
Sponsor:
USBR, Mid-Pacific Region
ITRC Report No. R 99-004
Hand Held Data Recorder (HHDR)
An HHDR is used to collect data from the field and to
download that data to a database to generate reports for
meters in the irrigation districts.
Sponsor:
USBR, Mid-Pacific Region
ITRC Report No. R 99-005
District Application of Hand Held
Data Recorder Technology
A hand held data recorder (HHDR) enables a district to
collect field data in a quick and virtually error-free
manner. The data gathered with HHDRs depend on each
district's needs: meter readings-totalizer, meter flow
rates, crop type and double crop tracking, crop growth
stage, meter status, maintenance codes for meter repairs,
maintenance codes for meter area, water use type, pump
runtimes, weather data, and power meter readings.
Sponsor:
USBR, Mid-Pacific Region
1998
ITRC Report No. R 98-001
Modern Water Control and
Management Practices in Irrigation: Impact on Performance
This research addressed the basic questions of what levels
of water delivery service are presently provided by
irrigation projects having some aspect of modernization;
what hardware and software features impact those levels of
service; whether modern water control and management
practices in irrigation make a positive difference in
performance; and what universal lessons can be learned and
applied.
The full published report is also available from the Food
and Agriculture Organization of the United Nations, FAO
Water Report 19, ISBN 92-5-104282-9, publications-sales@fao.org
ITRC Report No. R 98-002
Drip/Micro Irrigation Survey for
Delano-Earlimart Irrigation District
DEID obtained a grant from USBR Mid-Pacific region to
examine perceptions of its farmers regarding future
conversions to drip and micro-irrigation. DEID then
contracted with the Irrigation Training and Research
Center (ITRC) at Cal Poly San Luis Obispo to conduct and
analyze a survey of DEID farmers with the objectives of
answering several questions. This report presents the
pertinent data and results from the survey.
1996
ITRC Report No. R 96-001
Row Crop Drip Irrigation on
Peppers Study - High Rise Farms
A 3-year study was completed on a commercial field of
approx. 50 acres. Design and management support were
provided, and improvements were documented in both
irrigation efficiency and energy efficiency.
ITRC Report No. R 96-002
Row Crop Drip Irrigation on Bell
Peppers Study - Underwood Ranches
A 3-year study was completed on a commercial field of
approx. 50 acres. Design and management support were
provided, and improvements were documented in both
irrigation efficiency and energy efficiency.
ITRC Report No. R 96-003
Buried Drip Irrigation on Pistachios
Study - Munger-Poonian Land and Farming Co.
A multi-year study and
technical support were conducted on commercial fields of pistachios,
apples, table grapes, wine grapes, and blueberries in
central California. The learning curve
required by growers, and energy and irrigation
efficiencies was documented.
ITRC Report No. R 96-004
Status and Needs Assessment: Survey
of Irrigation Districts - USBR Mid-Pacific Region
ITRC gathered data from 61 agricultural districts in the
U.S. Department of the Interior Bureau of Reclamation's (USBR)
Mid-Pacific Region by interviewing irrigation district
personnel and studying their Water Conservation Plans.
These districts comprise about 90% of the irrigated
acreage in the Mid-Pacific Region. Data were
analyzed to determine general demographic information, the
degree of water delivery flexibility provided to farmers,
and the extent of existing and planned district
modernization.
1995
ITRC Report No. R 95-001
Delano-Earlimart Irrigation
District: Variable Frequency Drive Study
This study examined the pump station operation at Delano-Earlimart
Irrigation District after the installation of a variable
frequency drive (VFD) control. A detailed evaluation
was made in order to develop specific recommendations on
the operation and use of VFDs.
1994
ITRC Report No. R 94-002
Estimating the Payback for an
Electrical VFD (Variable Frequency Drive) Application in a
Pumping Plant Which Presently Spills Excess Pumpage
This report includes equations and tips for pump selection
criteria and estimating the annual KW-HR savings for a VFD
installation, including the maximum potential savings and
the approximate amount of KW-HR that would have been
consumed if one pump had been converted to VFD.
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