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Turf Sprinkler Irrigation. Trenching for turf system mainlines and laterals.

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Presentation on theme: "Turf Sprinkler Irrigation. Trenching for turf system mainlines and laterals."— Presentation transcript:

1 Turf Sprinkler Irrigation

2 Trenching for turf system mainlines and laterals

3 A 3-inch mainline supplying a 2 ½-inch lateral

4 Swing arm plumbing for large turf sprinkler head

5 A plumbed sprinkler head ready for wiring and backfilling

6 Hunter ® valve-in-head turbine driven rotor sprinkler P= 70 psiq s =50.5 gpmD w =170 ft P= 80 psiq s =53.5 gpmD w =176 ft P= 90 psiq s =57.4 gpmD w =180 ft P=100 psiq s =59.5 gpmD w =184 ft #53 (53/128) range nozzle + #24 (3/16) spreader nozzle

7 Valve-in-head sprinkler

8 Wire to connect controller to valves Individual Hot wires (Red; typically 14 AWG) to each valve Individual Hot wires (Red; typically 14 AWG) to each valve A single Common wire (White; typically 12 AWG) for all valves A single Common wire (White; typically 12 AWG) for all valves

9 Gel-filled waterproof connector cover for buried wire splices

10 Bundling extra wire to ease future repair operations

11 Newly back-filled turf head

12 Low pressure drain for lateral lines

13 Adapter for Funny Pipe riser and low pressure drain

14 Small turf head with Funny Pipe connector attached

15 Home Landscape Irrigation 4.6

16 Separate meter for home landscape irrigation system Irrigation rate for city water (no sewer charge) Meter Size, inches 5/8 ¾ 1 Maximum Capacity, gpm 203050 Recommended Capacity, gpm 1522.537.5

17 ¾-inch Electric Diaphragm Valve

18 Golf Course Irrigation Zones Different zones because of differences in- Turf varieties: bent, bermuda, etc.Turf varieties: bent, bermuda, etc. Soils: sand-based greens, native soil fairwaysSoils: sand-based greens, native soil fairways Traffic load: tee boxes, greens, walk-up areasTraffic load: tee boxes, greens, walk-up areas Canopy maintenance: fairways, roughCanopy maintenance: fairways, rough

19 - Putting Green Zone - Walk-up Area Zone - Fairway Zone -Tee Box Zone Golf Course Irrigation Zones

20 Lateral Line Layout for Parallel Fairways (2 conventional sprinklers per valve) Mainline Supply Water Flow Valve

21 Looped Supply Lines on Parallel Fairways (Valve-in-Head Fairway and Tee Box Sprinklers) (Conventional Green Sprinklers)

22 Fairway Runoff Research Plots at OSU Turf Research Farm

23 Effect of Slope and Sprinkler Leveling on Coverage Sprinkler axis perpendicular to ground slope Sprinkler axis vertical

24 Irrigation Control Software

25 Adjustment of Watering Time Watering time can be increased or decreased according to prevailing water use conditions (ET). ET can be taken from a weather station on site provided by the supplier, or taken from some generic source (eg., Mesonet). Adjustments can be system- wide, or for any subset of zones within the system.

26 The terminology and capabilities of each controller/software package will vary. On-the-job training (RYFM) and/or a training seminar from the manufacturer will be necessary.

27 Irrigation Timing The ON/OFF timing of the irrigation system must be coordinated to avoid interference with play, mowing, and other maintenance while not exceeding the capacity of the water supply.

28 Time and Flow Rate Constraints (Q t = k v A d) Most controller software will allow you to program in constraints of available water flow rate. Once you program the on time for each zone, the controller will sequence the zones to maintain total flow within the constraint. A graphical output will show the time required to determine if irrigation will be completed within the available time.

29 Record Keeping Most controller software can also be programmed to maintain a history of on times, depths applied, gallons pumped, etc. These data can be extremely helpful in budgeting, troubleshooting and other management decisions.

30 Antenna Transmitting Signals from Main Controller to Satellites

31 Typical Satellite Irrigation Controller

32 Electronics Linking Satellite Controller to Main Controller

33 Connections from Zone Valves to Satellite Controller Common wires from 3 holes 24-volt AC hot wires from each zone valve on 3 holes

34 Completed valve-in-head sprinkler installation ready for back-filling

35 Valve-in-Head Sprinkler Components Housing/CaseMain NozzleRotor Cover Spreader Nozzles Water supply tube for valve operation Solenoid

36 Large Turbine-Driven Rotor Sprinkler for Fairway Irrigation

37 Diaphragm Valve (24-v. AC) to Control a Multiple-Head Zone

38 Electrically Operated Diaphragm Valve Cutaway Solenoid Solenoid plunger Port carrying pressurized water to inflate diaphragm Port allowing water trapped behind diaphragm to be vented Optional flow control screw adjustment Diaphragm Valve seat Spring

39 1-inch Electric Diaphragm Valve w/ Flow Control 24 VAC solenoid Manual flow control adjustment Internal/external bleed port

40 Pressurization Port Spring Spring Valve Body 24-VAC Solenoid Drain Port Valve Seat Valve Cap Diaphragm Auto Manual Drain Bleed Port Valve Solenoid Plunger & Drain Port Seal Water Flow

41 Topside Cap Underside Diaphragm Pressurization Port Auto Bleed Port Manual External Bleed Valve Diaphragm Valve Seal

42 Inexpensive 4-zone controller with transformer

43 Valve-in-head Sprinklers Controller Conventional Sprinklers Electric Valve Control Wiring Control Wiring Turf Sprinkler Control Mainline Lateral Lines

44 Pumping Plant Installations Water Power Security Access

45 Pond Intake Gallery Pump Well Vertical Turbine Surface Water Pumping Station Allowable water level fluctuation

46 Typical Golf Course Pump House

47 60-HP Holloshaft Motors on Vertical Turbine Pumps

48 Electric Pump Control Panel A complex control panel to operate and protect an electric irrigation pump may include: - over-current protection - phase protection -lightning arrestors -computerized control for: -soft start -reduced speed operation

49 Computerized Motor Control Computerized motor control allows soft starts, which reduce the current flow when the motor rotor is not yet up to full speed. Computerized control can also artificially alter the frequency of the electric supply, allowing the motor to operate at speeds other than nominal synchronous speeds (3600, 1800, or 1200 RPM).

50 Computerized control panels can log performance data

51 Pulse-count Water Meters Provide Feedback to Irrigation Controllers Magnetic pick-up counts meter revolutions Paddle-wheel water meter Signal wire connected to irrigation controller

52 Pressure Regulating Valve Controls Output Pressure from Pump Station

53 Some diaphragm valves are equipped with a Schrader valve that will allow measurement of pressure in the valve during operation Pressure Gauge Schrader Valve Schrader Valve Fitting

54 Pitot Gauge for Measuring Sprinkler Outlet Pressure

55 USGA Putting Green Profile Root Zone Mix Coarse grained material (loamy fine sand – fine sand) (Hyd. Conductivity > 6 in./hr) Intermediate Layer (coarse sand – fine gravel) Crushed Stone Native Soil 12 in. 4 in. 4 in. 8 in. 8 in. Drainage Lines Titleist

56 Green Irrigation (USGA Specification Greens) Flushing once per weekFlushing once per week –Heavy irrigation that wets entire profile depth and produces leachate to the drainage system Hand watering dailyHand watering daily –Concentrate on areas that dry out quickly Shoulders of elevated greensShoulders of elevated greens High spots in undulating greensHigh spots in undulating greens Late summer (August)Late summer (August) –Increase flushing schedule to every 6 days or even every 5 days

57 Hand watering will supplement irrigation system watering on areas which dry out more rapidly due to elevation contours Elevated portions of greens will dry out quicker

58 Fringe areas of elevated greens will dry out more quickly

59 Backflow Prevention Protects water source from contamination by non-potable water in case of unexpected pressure loss in the system. Required by plumbing code in the case of permanent sprinkler systems. Required by federal law on irrigation systems which apply fertilizer and pesticides (chemigation systems).

60 Backflow Preventers Gooseneck pipe loop with Pressure Vacuum Breaker (PVB)Gooseneck pipe loop with Pressure Vacuum Breaker (PVB) Reduced Pressure Zone device (RPZ)Reduced Pressure Zone device (RPZ) Double check valve (Not approved for public water systems)Double check valve (Not approved for public water systems)

61 Gooseneck pipe loop w/ PVB backflow preventer 2 ft min. above highest outlet

62 Reduced Pressure Zone (RPZ) Backflow Preventer

63 Electric Piston Valve with Anti-siphon Valve 24-VAC solenoid Flow Path Manual flow control adjustment Anti-siphon AVB valve

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