TAILIEUCHUNG - Determination of hydraulic performance of trickle irrigation emitters used in irrigation systems in the harran plain

Trickle irrigation systems’ efficiency depends on system uniformity, which is determined by water discharge uniformity from emitters. It is impossible to produce 2 identical emitters due to manufacturing variations. The manufacturer’s coefficient of variance is used as a measure of discharge variations of emitters. | Turk J Agric For 28 (2004) 223-230 © TÜB‹TAK Determination of Hydraulic Performance of Trickle Irrigation Emitters used in Irrigation Systems in the Harran Plain Halil KIRNAK* University of Harran, Agriculture Faculty, Irrigation Department, 63200, fianl›urfa - TURKEY Ergün DO⁄AN University of Harran, Agriculture Faculty, Irrigation Department, 63200, fianl›urfa - TURKEY S›dd›k DEM‹R University of Harran, Graduate School of Natural and Applied Science, 63200, fianl›urfa - TURKEY Sabri YALÇIN Göktepe Co., 63200, fianl›urfa - TURKEY Received: Abstract: Trickle irrigation systems’ efficiency depends on system uniformity, which is determined by water discharge uniformity from emitters. It is impossible to produce 2 identical emitters due to manufacturing variations. The manufacturer’s coefficient of variance is used as a measure of discharge variations of emitters. In this study, manufacturers’ reported discharge rates and coefficients of manufacturing variation (CVm) values were compared with test results for various types of in-line emitters manufactured by 4 different companies in Turkey. A total of 9 drip irrigation lines, comprising 7 non-compensating and 2 compensating emitters, were tested at 50, 100, 150, 200 and 250 kPa pressures. Non-compensating emitter types were not tested at 250 kPa. Compensating emitter exponents ranged from to while non-compensating emitters’ values varied between and . Test results showed that only 1 of the 7 non-compensating emitters and both compensating emitters had flow rates within ± 10% of manufacturers’ reported values. The t-test between manufacturers’ reported and measured mean flow rates at manufacturers’ reported nominal operating heads showed that there was no significant statistical difference at the α 15 excellent average marginal poor unacceptable Emitter exponents The emitter is the most important part of drip irrigation tubing. An emitter with a high degree of pressure compensation

• Nông nghiệp
• Drip irrigation
• In line emitters
• Manufacturers’ coefficient of variance
• Emitter exponent
• Non compensating emitters
• Saline water
• Salt dynamics
• Cabbage (L Brassica oleracea var capitata)
• Drip irrigation in cabbage
• Irrigation on water dynamics
• Management of drip irrigation system
• Drip irrigation system
• Drip adopted farmers in management
• Suggestions offered
• Constraints faced
• Hydraulic performance
• Drip irrigation in tomato
• Economics of drip systems
• Paradigm shift towards modern irrigation systems
• Water use efficiency and economics
• Pigeon pea to drip irrigation
• Pigeon pea
• Bio fertilizers based fertigation schedule
• Varying levels of drip irrigation
• Drip irrigation on yield
• Quality parameters
• Economics of cucumber
• Tagetes erecta L
• African marigold (Tagetes erecta Linn)
• Fertigation through drip irrigation
• Irrigation scheduling
• Water use efficiency
• Water saving
• Drip irrigation in wheat
• Deficit irrigation
• Irrigation levels
• Planting layout
• Turmeric yield and economics
• Friction loss
• Drip irrigation laterals
• Mathematical model
• Dimensional analysis
• Disc filter
• Head loss
• Drip irrigation systems
• Metal body disc filters
• Subsurface drip irrigation
• Air injection
• Sandy clay loam soil
• Nano solar pump
• Gravity based drip irrigation
• Vegetable cultivation
• Gravity based drip irrigation system
• Major problem in rainfed areas
• Farmers in Bikaner district
• Drip irrigation system were selected randomly
• Panchayat samities
• Proper economization of water
• Greenhouse grown tomato
• Drip irrigation levels
• Soilless media
• Productivity and economics
• Economics of greenhouse grown tomato
• Surface and subsurface drip irrigation method
• Lateral and emitter spacings
• Textile waste water
• Vegetable crop
• Vegetable crop under drip irrigation
• Physiological parameters
• Seed germination
• Drip irrigation levels on amaranthus
• Amaranthus (Amaranthus hybridus L)
• Yield and water
• Efficiency under shade net
• Sandy loam soil
• Characterize the moisture distribution pattern
• Drip irrigation under sandy loam soil
• Better crop response
• Frictional head loss
• Pressure drop
• On farm drip irrigation systems design
• Farmers’ fields
• Electrical conductivity
• GSM modem
• Sensors and Solenoid valve
• Automated drip irrigation system
• Field level investigation
• Bt cotton
• Nitrogen and seed cotton yield
• Seed cotton yield
• Drip irrigation in Bt cotton
• Different mulch materials
• Vegetative growth
• Yield of ginger
• Ginger (Zingiber officinale Rosc )
• Influence of spacing
• Drip irrigation on yield attributes
• Pigeonpea (Cajanus cajan L )
• Colour plastic mulch
• Okra (Abelmoschus esculentus)
• Different levels of drip irrigation
• Growing period
• Plastic mulching
• Drip irrigation regimes
• Mulching in Mango
• Mango cv Pant sinduri