IRRIGATION3 Design of Irrigation Systems by Lszl Ormos

IRRIGATION_3 Design of Irrigation Systems by László Ormos

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: • Crop: – Line space: – Plant space: – Root zone depth: – Crop factor: – Pan factor: – Peak evaporation: A=8 hectares cytrus l=6 m d=4 m ZR=0. 8 m KC=1 KP=0. 63 EP =8. 3 mm/day

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

Design of Pressurized Irrigation System for Citrus Orchard • Soil: – Infiltration rate: – Specific weight: – Field capacity: – Permanent wilting point: – Peak water deficit: • Emitter: – Wetted area per dripper: – Irrigation efficiency: • Maximum allowable operating hours: • Water source: clay loam v=10 mm/hr S=1. 33 g/cm 3 FS=36. 04 % PW=19. 8 % PWD=40 % dripper PWA=30 % ir=85 % tmop=14 hrs/day river, (60 m far away from the field)

Design of Pressurized Irrigation System for Citrus Orchard 1. Determination of irrigation interval Peak water consumption: Available net water for 100% coverage in the root zone layer:

Design of Pressurized Irrigation System for Citrus Orchard Net water application depth: Irrigation interval consists of 3 days for irrigation and 1 day for maintenance.

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)

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

Design of Pressurized Irrigation System for Citrus Orchard 3. Dripper selection • • Outlet water quantity of dripper: Diameter of wetted area: (in clay loam soil) Wetted are per dripper 3. 5 l/hr ~1. 6 m

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

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

Design of Pressurized Irrigation System for Citrus Orchard 4. Adjusted irrigation rate (as per selected dripper) 5. Since AIR>RIR Irrigation time the selected dripper satisfies requirements.

Design of Pressurized Irrigation System for Citrus Orchard 6. Maximum number of shifts 7. Maximum area irrigated per shifts

Design of Pressurized Irrigation System for Citrus Orchard 8. Position discharge

Design of Pressurized Irrigation System for Citrus Orchard Farm lay-out A ~133. 3 m From the water head 200 m 9. 60 m 400 m

Design of Pressurized Irrigation System for Citrus Orchard Farm lay-out B From the water head 60 m 200 m 9. ~133. 3 m 400 m ~133. 3 m

References Azenkot, A. (1998): ”Design Irrigation System”. Ministry of Agriculture 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 Agriculture 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