Design of Drip Irrigation System

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Hazen-Williams Equation (C=150)∆ H = 15.27 (Q 1.852 ) LD 4.871∆ H = Energy drop by friction (m)Q = Flow rate of the pipe (litre/sec)L = Length of the pipe (m)D = Diameter of pipe (m)
Friction CoefficientsPipe materialF – mm (Darcy- C (Hazen-Williams)Weisbach)PVC and PE 0.0015 - 0.007 140 -150Asbestos-cement 0.3 130-140New steel 0.045 - 0.09 110-120Five year old steel 0.15 - 4.0 80 - 90Steel with internalconcrete coating0.3 - 1.0 110 - 120Concrete 0.3 - 5.0 90 - 100
Page 2 and 3: Drip Irrigation?Drip irrigation is
Page 4 and 5: Components of Drip Irrigation Syste
Page 6 and 7: Criteria for System Selection• Ec
Page 8 and 9: Command Area Information• A comma
Page 10 and 11: Selection of Type and Number of Emi
Page 12 and 13: Design of Mainline and Laterals The
Page 16 and 17: Frictional Head Losses (m/100 m) fo
Page 20 and 21: Frictional Head Losses (m/100m) for
Page 24 and 25: Frictional Head Loss (m/100 m) for
Page 26 and 27: Head Losses in Valves and Accessori
Page 28 and 29: Design of Prime MoverPower requirem
Page 30 and 31: ExampleDesign a drip irrigation sys
Page 32 and 33: Example (cont)• Divide the area i
Page 34 and 35: Irrigation Scheduling• Crop : Cit
Page 37 and 38: Energy/Head LossesHead loss in pipe

Design of Drip Irrigation System

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