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 Drip Tubing Hydraulics During Pressurization
John R. Buchanan and Tara J. Garrett
Item Number: NRL2006AC-18
Shipping Weight: 0lbs. 0oz.
Price: $20.00
The uniformity of application is one of the primary advantages to using drip irrigation technology to disperse effluent into the soil. Uniform application means that the each area within the absorption field receives an equal dose of effluent. With the advent of pressure compensated emitters, drip systems can be easily designed to provide uniform distribution during steady state operation. However, during pressurization and depressurization (non-steady state operation), flow and pressure in the system is dynamic. During pressurization, emitters near the supply will produce water while emitters at the distal end will not have yet received water. This issue is further compounded because drip systems are dosed several times per day, therefore, the non-steady state phase could significantly degrade the overall application uniformity. It is understood that longer laterals (continuous lengths of tubing) take longer to fully pressurize. Thus it is reasonable to suggest that longer laterals will exhibit a greater non-uniformity. This project seeks to define the significance of the non-steady state emitter discharge relative to lateral length. Understanding the tubing hydraulics during pressurization is a key parameter when designing a system to have a uniform distribution.