Hydraulic, water and energy use evaluation of subsurface trickle irrigation system
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PublisherThe University of Arizona.
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AbstractThe hydraulics, water use, and energy use of a two year old subsurface drip irrigation system installed at the Maricopa Agricultural Center in southern Arizona were examined to evaluate the performance of typical subsurface drip irrigation systems. Although the pressure distribution was better than expected due to the effect of the looped network, the average discharge rate of the drip tape decreased by 20% as reflected by the change in the discharge coefficient from 0.45 to 0.36 over two years and emitter plugging resulted in the statistical uniformity being only 64.6%. Water use was higher than expected at 50.76 and 41 inches during the two years of use. The total annual energy requirements for the system including direct, 7593 megajoules/hectare/year, and indirect, 12965 megajoules/hectare/year, inputs was 24318 megajoules/hectare/year.