ReadmeSprinkler Irrigation Design Worksheet:Designed Use: This
sprinkler design spreadsheet has been developed for small, simple
irrigation projects.It's intended use is for a maximum NRCS Job
Class of II under Practice Code (PC) 430-DD and PC 442.This relates
to a maximum of 600 GPM, 7 fps, and 80 psi working pressure.This
spreadsheet can only be used for wheeline or handline systems with
buried PVC mainlines.Recommend running the IWM, Irrigation Water
Management Worksheet Dos program before or in conjunctionwith this
spreadsheet.Steps;Step 1 - "System design" (tab) must be run first.
Fill in the required data input cells (gray with red numbers).Step
2 - "Est. cost and other data" (tab) can be run after step 1. Fill
in the required data input cells(gray with red numbers). Some data
is transferred from step 1 data input. This part of the
spreadsheetcan be run to estimate the operating and maintenance
costs and also calculate additional datafor NRCS documentation
and/or the landowner.Questions;Questions can be directed to Greg R.
Card, Civil Engineering Technician and the Redmond, OregonService
Center. Phone No. 541-923-4358 Ext. 115 or e-mail
[email protected] material used:New - National
Engineering Manual, Part 652, Irrigation GuideNew - National
Engineering Manual, Part 623, Irrigation Water
RequirementsEngineering Field Manual, Chapters 3, and 15National
Engineering Handbook, Section 15, Chapter 1, Soil-Plant-Water
RelationshipsNational Engineering Handbook, Section 15, Chapter 8,
Irrigation Pumping PlantsNational Engineering Handbook, Section 15,
Chapter 11, Sprinkler IrrigationRainbird Impact Sprinkler nozzle
catalog and Rainbird Slide-rulerCornell Pump CatalogWaterman
Irrigation Catalog - ARV & PRV sectionResource data required to
use this Spreadsheet;Maps;FSA aerial photos or farm plan , 7.5 min.
topog. Map and soils mapField visit;Locate and determine what
modications are needed to existing delivery system.Landowners
existing management & operation.Landowners proposed management
& operation of new system.Type of irrigation system, I.e.
wheeline or handline.Proposed crop(s) and rotation crops.Other
recommended computer programs:1.) Recommend running the IWM,
Irrigation Water Management Worksheet - Dos program in
conjunctionwith this spradsheet.2.) For the example job - Mr. Joker
there is an AutoCAD LT version 12 file included called
sprinkler.dwg.Recommend using this drawing and making edits to text
and layout as needed to meet your project.Printing and
Protection:Each individual spreadsheet (tabs) within this Excel -
Design Aid is set-up (margins, etc.)to print to an HP 4MV laser
printer.All spreadsheets are protected from tampering with the
formulas and text. If there is a needto modify something, please
contact me at the numbers and address above.Readme - Sprinkler
Design.xls
Step 1-System designSPRINKLER IRRIGATION DESIGN WORKSHEETUSE;
This Sprinkler design aid should not be used on any project larger
than 600 GPM. Based upon NRCS Job Class IIon the Skill Matrix
Worksheet for Practice Code (PC) 430-DD, Irrigation Water
Conveyance, High Pressure plastic pipeand PC 442, Sprinkler system
design. DATA INPUT: Gray areas (red no.'s). DATA OUTPUT: White
cells (Blue no.'s).Landowner:Mr.
JokerCounty:KlamathDistrict:KlamathDRAFT- Version 2 -
24-00Address:1515 NE Rocky rd.Location:Sec. 3, T3S, R13EDeveloped
By: Greg R. CardKlamath Falls, OR. 97601Checked
by:Date:541-923-4358 Ext. 115Prepared by:Greg R.
CardDate:13-Mar-03Job Class:[email protected]:Acres
to Irrigate80Water SourceDitchField Slope (%)1Water Right
(gpm)896Type of SystemXWheelineHandlineOtherEst. Ave. Wind Speed
(mph)5DirectionNWSoil;Type (Description & Texture)Forney -
Loamy Fine SandSoil No.19 ADepth (ft.)4Max. Allowable Sprinkler
Applic. Rate (in./hr.)0.5Total moisture holding capcity per foot
increment0-11-22-33-44-5(in./in.)0.120.120.120.120(inches)1.441.441.441.440Total
moisture holding capacity (in.)5.76Crop;Planned CropP.
GrassRotation CropnoneClimate StationKlamathMature Crop Root Zone
Depth (ft.)3See NEM, Part 652 Irrig.Guide, Chp. 3Moisture Allowable
Deficiency (MAD %)50%See NEM, Part 652 Irrig.Guide, Chp. 4Managed
Root Zone depth (ft.)3.5Total water holding capacity at extraction
depth (in.)5.04Crop Requirements;Net moisture to be replaced
(in.)2.52Note: Not exact, uses ave. of all incrementsDesign
Irrigation System efficiency (%)65%See Table 2 belowGross
Application (in.)3.88Crops peak Evaportranspiration use
(in./day)0.24See NEM, Part 652 I.G., Chp.4 or WebsiteMaximum Irrig.
Frequency (days)10.5http://mac1.pn.usbr.gov/agrimet/** SPRINKLER
DESIGN:Sprinkler spacing (ft.)40Lateral spacing (ft.)60See Table 1
belowDesigned number of hours per set (hr's)11.5Application rate
required (in./hr.)0.34Sprinkler head makeRainbirdNozzle size
(in.)13/64Model30EWHGPM8.0at PSI of45= Wetted Dia.
(ft.)106Calculated Applic. rate (in./hr.)0.32Should be < or
equal to App. Req'd andmaximum allowable for soilTable 1Table
2Sprinkler spacing on laterals and mainlineDepth of WaterApplic.
RateApplic. Rateshould not exceed the following spacing
basedApplied< 0.5 in./hr.> 0.5 in./hr.on the wetted sprinkler
diameter.Wind 0-4 MPH< 2.0 in.6570Ave. Wind
VelocityLateralsMainline> 2.0 in.7075Less than 5 MPH0.5 x
dia.0.65 x dia.Wind 4-10 MPH< 2.0 in.60655 MPH0.5 x dia.0.65 x
dia.> 2.0 in.657010 MPH0.5 x dia.0.65 x dia.Wind 10-15 MPH<
2.0 in.5560Greater than 10 MPH0.5 x dia.0.65 x dia.> 2.0
in.6065** ATTACH a complete layout map showing elevations, pump
location, water source, mainline layout, laterallayout, nozzle
spacing, riser spacing, all pipe lengths, air vacuum & press.
Relief valves, thrust blocks, etc.System Design - Sprinkler
Design.xls Page 1 of 3** LATERAL DESIGN:Note: Recommended use with
Rainbird slide rulerType and sizeAlum wheeline 5" dia.pipe - 5'
wheelsNote: Use largest field and longest lateral.Laterals required
(ea.)1based on set time & crop needsNote: Check number of riser
div. By moves perday. Should be < or equal to Max. Irrig.
FrequencyTotal laterals on field(s)2Designed Ave. operating
pressure for lateral (PSI)45Longest lateral:Total (ft.)1280Note:
Longest lateral in the system.No.SpacingGPM/Nozz.Dia.FrictionTotal
FrictionNozzles(ft.)(in.)(PSI)Loss
(ft.)33408.052.25.1008.0000.0Note: Use if lateral has two pipe
sizesPressure loss in longest lateral (PSI)2.29
