IRRIGATION_3

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IRRIGATION_3

• Design of Irrigation Systems
• by
• László Ormos

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Design of Pressurized Irrigation System for
Citrus Orchard

• (After Rajaram B. Patil, India Mario Petrus
  (Cyprus)Laszlo Ormos (Hungary)
• Tshering Drukpa (Bhutan) Michael Nwachukwu
  (Nigeria) Gwendolyn Bidad-
• Folgo (Philippines)
• Design Consideration
• Farm land area A8 hectares
• Crop cytrus
• Line space l6 m
• Plant space d4 m
• Root zone depth ZR0.8 m
• Crop factor KC1
• Pan factor KP0.63
• Peak evaporation EP 8.3 mm/day

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Design of Pressurized Irrigation System for
Citrus Orchard

• The farm field

6m
200m
400m
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Design of Pressurized Irrigation System for
Citrus Orchard

• Soil clay loam
• Infiltration rate v10 mm/hr
• Specific weight ?S1.33 g/cm3
• Field capacity FS36.04
• Permanent wilting point PW19.8
• Peak water deficit PWD40
• Emitter dripper
• Wetted area per dripper PWA30
• Irrigation efficiency ?ir85
• Maximum allowable operating hours tmop14
  hrs/day
• Water source river,
• (60m far away from the field)

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Design of Pressurized Irrigation System for
Citrus Orchard

• Determination of irrigation interval
• Peak water consumption
• Available net water for 100 coverage in the root
  zone layer

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Design of Pressurized Irrigation System for
Citrus Orchard

• Net water application depth
• Irrigation interval

Irrigation interval consists of 3 days for
irrigation and 1 day for maintenance.
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Design of Pressurized Irrigation System for
Citrus Orchard

• 2. Required irrigation rate
• Net water application depth for 100 coverage
  (adjusted)
• Net water application depth for 30 coverage
  (adjusted)

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Design of Pressurized Irrigation System for
Citrus Orchard

• Gross water dose
• Required irrigation rate

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Design of Pressurized Irrigation System for
Citrus Orchard

• Dripper selection
• Outlet water quantity of dripper 3.5 l/hr
• Diameter of wetted area 1.6 m
• (in clay loam soil)
• Wetted are per dripper

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Design of Pressurized Irrigation System for
Citrus Orchard

• Number of required drippers
• Dripper spacing

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Design of Pressurized Irrigation System for
Citrus Orchard

• Dripper setting

4m 4m
6m
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Design of Pressurized Irrigation System for
Citrus Orchard

• Adjusted irrigation rate (as per selected
  dripper)
• Irrigation time

Since AIRgtRIR the selected dripper satisfies
requirements.
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Design of Pressurized Irrigation System for
Citrus Orchard

• Maximum number of shifts
• Maximum area irrigated per shifts

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Design of Pressurized Irrigation System for
Citrus Orchard

• Position discharge

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Design of Pressurized Irrigation System for
Citrus Orchard

• Farm lay-out A

133.3m
133.3m
133.3m
200m
400m
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Design of Pressurized Irrigation System for
Citrus Orchard

• Farm lay-out B

200m
400m
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References
Azenkot, A.(1998)Design Irrigation System.
Ministry of Agricul- ture Extension Service
(Irrigation Field service), MASHAV Israel Dr.
Avidan, A.(1995)Soil-Water-Plant Relationship.
Ministry of Agriculture Extension Service
(Irrigation Field service), CINADCO, Ministry of
Foreign Affairs, MASHAV, Israel Sapir, E.-Dr. E.
Yagev (1995)Drip Irrigation. Ministry of
Agricul- ture and Rural Development, CINADCO,
Ministry of Foreign Affairs, MASHAV,
Israel Sapir, E.-Dr. E. Yagev (2001)Sprinkler
Irrigation. Ministry of - culture and Rural
Development, CINADCO,Ministry of Foreign
Affairs, MASHAV, Israel Eng. Nathan, R.
(2002)Fertilization Combined with Irrigation
(Fertigation). Ministry of Agriculture and Rural
Development, CINADCO,Ministry of Foreign Affairs,
MASHAV, Israel