Irrigation Professionals with questions about ... - Hunter Industries

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In Figure 5, the slope is referred to as a 1-1/2 to 1 slope. This means thatyou must measure out 1-1/2 foot in order to record a 1 foot drop.1 ft1-1/2 ftSlope RatioSlope-to-Plan Factor1-1/2:1 1.202:1 1.122-1/2:1 1.05If the actual soil measurement is 12 feet, and the sloperatio is 1-1/2:1, then divide by the Slope-to-Plan Factor:12 feet ÷ 1.20 = 10 feet plan measurementOr, if the plan measurement is 10 feet for a slope <strong>with</strong> a1-1/2:1 ratio, then multiply by the Slope-to-Plan Factor:10 feet x 1.20 = 12 feet soil measurement
Step 2 - Redraw On Graph PaperThe next step is to redraw your sketch on graph paper. Be sure thedrawing is large enough to read, is positioned correctly, and fits on thepaper.Using your drafting scale, see which scale will provide the largest drawingpossible. (Generally, the 10 or 20 scale works fine.) In the drawing infigure 2, the longest property line is 70 feet, so you would first try the 10scale and see if the 70 foot property line will fit on the paper. If whenusing the 10 scale the property won’t fit, try the 20 scale.Normally, you would want to position the property on the drawing so thatthe North arrow is pointing up (North would be at the top of the page), andthe title block on the graph paper is to the right. In some cases, theproperty will be very narrow and long <strong>with</strong> the North arrow runningparallel to the long property line. In a case such as this, you may have toturn the property so that the North arrow is pointing side-ways in order touse a scale where the drawing will be legible.Be sure to transfer all of the information on your sketch to the newdrawing, including the house, property lines, driveway, trees, shrubs,patios, decks, lawns, lamp posts, fences, walls, walkways, etc.Once you have transferred the site information you will have a completedplot plan on which you will be able to design your system. On the newdrawing, divide the property into areas. The areas should be as large aspossible, while considering the different watering needs of lawns andshrubs in sunny or shady areas.
Page 1 and 2: Irrigation Professionals with quest
Page 3 and 4: Plot PlansIntroductionOne of the mo
Page 5 and 6: Drawing ToolsThere are just a few t
Page 7 and 8: Measure the PropertyTake careful me
Page 9: Trees, water meters, and other item
Page 13 and 14: SymbolsIn order to distinguish betw
Page 15 and 16: Make sure the drawing is dated and
Page 17 and 18: Step 4 - Group Sprinklers Into Zone
Page 19 and 20: Basic HydraulicsIntroductionHydraul
Page 21 and 22: How Pressure is Created By the Weig
Page 23 and 24: Does the Shape or Size of the Conta
Page 25 and 26: L O W24 VAC 50-60 Hz60mA INRUSH60mA
Page 27 and 28: Factors Affecting Dynamic PressureW
Page 29 and 30: INSIDE DIAMETER (i.d.) of the pipe:
Page 31 and 32: LENGTH is the fourth factor affecti
Page 33 and 34: D) SDR -Standard Dimension Ratio -
Page 35 and 36: 1. Look in the left column (FLOW G.
Page 37 and 38: SummaryThere is a limited amount of
Page 39 and 40: DefinitionsUse the diagram below al
Page 41 and 42: Calculating Dynamic Pressure at Des
Page 43 and 44: D. Estimate Pressure Available at
Page 45 and 46: Line #5 - Service Line: This is the
Page 47 and 48: Line #11 - Volume Through the Meter
Page 49 and 50: C. Calculate Dynamic Pressure at De
Page 51 and 52: Line #16 - Pressure Loss in the Wat
Page 53 and 54: Line #21 - Pressure Change Due to E
Page 55 and 56: Design ProblemMany times, you will
Page 57 and 58: III. Systems Supplied by a PumpCalc
Page 59 and 60: D. Estimate Pressure Available at
Page 61 and 62:
Line #5 - Pressure at POC: If the P
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Sample Problem: 13.5 GPMC) Read acr
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D. Estimate Pressure Available at"W
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(METERED SYSTEMS)Design Capacity an
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Page 71 and 72:
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Page 75 and 76:
(PUMP SYSTEMS)Design Capacity and W
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(PUMP SYSTEMS)Design Capacity and W
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Sprinkler SelectionIntroductionThe
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Spray HeadsFixed spray heads may be
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Selecting the Proper SprinklerNow t
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Precipitation RateExpressed in inch
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Sprinkler Watering PatternsMost spr
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Choosing Nozzles for Gear Driven Ro
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5) Sprinkler Watering Patterns - Be
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HydrozonesA hydrozone is a portion
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Triangular spacing is usually the p
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and flow rate, the smaller the spri
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perpendicular (see Figure 33). Many
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“symmetrical” layout, and they
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Head spacing in narrow areas is det
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Head placement is complicated becau
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Figure 40PGJ
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On larger slopes, a combination of
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SummarySprinkler head placement is
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Backflow PreventionIntroductionBack
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System LayoutLaying out a system be
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Backflow Preventer LocationLocal pl
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time. Station run time can be tempo
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Pipe Sizing Using the Friction Loss
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Backflow Preventer and Valve Sizing
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Friction LossesIntroductionCalculat
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5. Multiply your answer by the leng
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Friction Loss CalculationsZone Numb
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Sample Problem:1.67= 0.0167 psi los
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Step 2Step 3Step 4Step 5Step 6Sprin
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Using the acceptable 10% allowance:
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SummaryCalculating the friction los
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Precipitation RatesIntroductionToda
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Sprinkler Precipitation RatesVersus
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Area CoveredArc by Sprinkler Flow90
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The Sprinkler Spacing MethodThis me
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Use of Precipitation Rates in Lands
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Irrigation SchedulingIntroductionUl
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Crop coefficient. Different plants
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ET Evaporation of soil surface wate
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Soil Intake RateSoil texture will p
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What You Need to KnowAs previously
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