1. Design of Irrigation Systems by László Ormos

2. 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: A=8 hectares
Crop: cytrus
Line space: l=6 m
Plant space: d=4 m
Root zone depth: ZR=0.8 m
Crop factor: KC=1
Pan factor: KP=0.63
Peak evaporation: EP =8.3 mm/day

3. Design of Pressurized Irrigation System for Citrus Orchard
The farm field 6m 4m
200m
400m

4. Design of Pressurized Irrigation System for Citrus Orchard
Soil: clay loam
Infiltration rate: v=10 mm/hr
Specific weight: S=1.33 g/cm3
Field capacity: FS=36.04 %
Permanent wilting point: PW=19.8 %
Peak water deficit: PWD=40 %
Emitter: dripper
Wetted area per dripper: PWA=30 %
Irrigation efficiency: ir=85 %
Maximum allowable operating hours: tmop=14 hrs/day
Water source: river,
(60m far away from the field)

5. 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:

6. 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.

7. 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)

8. Design of Pressurized Irrigation System for Citrus Orchard
Gross water dose
Required irrigation rate

9. Design of Pressurized Irrigation System for Citrus Orchard
Dripper selection
Outlet water quantity of dripper: l/hr
Diameter of wetted area: ~1.6 m
(in clay loam soil)
Wetted are per dripper

10. Design of Pressurized Irrigation System for Citrus Orchard
Number of required drippers
Dripper spacing

11. Design of Pressurized Irrigation System for Citrus Orchard
Dripper setting
4m m
drippers 6m

12. Design of Pressurized Irrigation System for Citrus Orchard
Adjusted irrigation rate (as per selected dripper)
Irrigation time
Since AIR>RIR the selected dripper satisfies requirements.

13. Design of Pressurized Irrigation System for Citrus Orchard
Maximum number of shifts
Maximum area irrigated per shifts

14. Design of Pressurized Irrigation System for Citrus Orchard
Position discharge

15. Design of Pressurized Irrigation System for Citrus Orchard
Farm lay-out A
~133.3m
~133.3m
~133.3m
From the
water head
60m
200m
400m

16. Design of Pressurized Irrigation System for Citrus Orchard
Farm lay-out B
From the water head
60m
200m
~133.3m
400m

17. 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