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Sprinkle Irrigation

Jack Keller & Ron.D Bliesner

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623.1100 Description 

(a) Adaptability

(b) Special uses

(c) Advantages

(d) Disadvantages

(e) Installation and operation of sprinkler systems


623.1101 Types of sprinkler systems 

(a) Periodic move sprinkler systems

(b) Continuous-move sprinkler systems

(c) Other sprinkler systems


623.1102 Planning concepts 

(a) Sprinkle irrigation system design

(b) Application depth requirements

(c) Root depth

(d) Management-allowed deficit (MAD)

(e) Irrigation interval

(f) Leaching requirement and gross depth

(g) Irrigations per season

(h) System capacity requirements

(i) Fixed systems

(j) Continuous-move systems

(k) Intake and optimum application rates


623.1103 System layout 

(a) Number of sprinklers operating

(b) Number of laterals required

(c) Lateral layout

(d) Mainline layout

(e) Location of water source and pump

(f) Adjustments to meet layout conditions


623.1104 Sprinkler irrigation efficiency

(a) Uniformity

(b) Water loss

(c) Application efficiency


Part 623

National Engineering Handbook

Chapter 11 Sprinkler Irrigation

11–iv (210–VI–NEH, Amendment 80, August 2016)


623.1105 Design procedure

(a) Periodic-move and fixed systems

(b) Wetted diameter and recommended spacings

(c) Effects of system pressure on uniformity

(d) Systemwide application uniformity

(e) Application efficiency

(f) Design application rate and set time

(g) Sprinkler discharge rate

(h) Discharge requirement

(i) Nozzle size and pressure

(j) Friction losses


623.1106 Lateral design 

(a) Laterals on level ground

(b) Laterals laid uphill

(c) Laterals laid downhill

(d) Laterals with two pipe sizes

(e) Laterals with flow-control devices

(f) Hose-fed design

(g) Perforated-pipe laterals


623.1107 Mainline design 

(a) General design procedure

(b) Design for a single lateral

(c) Design for a split-line layout

(d) Design with multiple laterals in rotation

(e) Main and submain layout

(f) Water hammer analysis


623.1108 Pipe sizing using life-cycle costs 

(a) Economic pipe selection chart

(b) Economical mainline design

(c) Pipe diameter selection

(d) Portable versus buried mainlines

(e) Design for continuous operation


623.1109 Pressure Requirements 

(a) Gravity pressure considerations

(b) Selection of pump and power unit

(c) Traveling sprinkler system


11–v

Part 623

National Engineering Handbook

Chapter 11 Sprinkler Irrigation

(210–VI–NEH, Amendment 80, August 2016)


623.1110 Center pivot design 

(a) System capacity

(b) Application intensity

(c) Sprinkler-nozzle configuration

(d) End gun and corner system operation

(e) Lateral friction loss 

(f) Economic pipe sizes

(g) Application uniformity and depth

(h) Pressure regulators

(i) Operating pressures

(j) Elevation-discharge relationship

(k) Machine selection


623.1111 Linear-move design 

(a) Sprinkler-nozzle configuration

(b) Maximizing linear-move field length


623.1112 Field evaluation 

(a) Field test data

(b) Field evaluation procedure

(c) Application of the field data

(d) Example calculation of application uniformity

(e) Center pivot field evaluations


623.1113 References

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