Performance Analysis of Self – Compensating Gated Pipe for Improving Surface Irrigation Efficiency

Abstract

Rationalizing irrigation water and maximizing water use efficiency became the priority of irrigation planners and users under Egyptian conditions. Therefore, the aim of this study was to evaluate adjusted of self-compensating gated pipe for modified surface irrigation and to evaluate the pepper yield response and water use efficiency under three irrigation system (drip irrigation ,traditional gated pipe and modified gated pipe) and three water treatments (100, 75 and 50% of ETC) in old land conditions of Egypt. Hereby field experiments were carried out at the Experimental Farm of Faculty of Agriculture, Ain Shams University, Kalubia Governorate, which represents alluvial soils, for two successive growing seasons 2006 and 2007. Results revealed that. In laboratory experiments of self-compensating gated pipe out let average discharge from 29 L/min were obtained at pressure range of (2-9 kPa) with coefficients of variation less than 0.9%. Uniform discharge was obtained at modified gated pipe under pressure range of 45-90 cm. Corresponding field data were similar to laboratory data. Regular uniform water flow from gates and regular uniform pressure head from each outlet was obtained along line at modified gated pipe under constant pressure. Regular advance times approximately was obtained in modified gated pipe along furrows (0

Performance Evaluation of an Innovative Self-Compensating Gated Pipe System for Furrow Irrigation: Preliminary Results

“…The shape of this diaphragm changes to maintain constant pressure along the pipe [15,16] carried out an experiment using a 150 mm gated pipe to determine the best opening areas for normal rectangular sliding gates to achieve the maximum distribution uniformity, by compensating the variation in pressure head. [17] developed a 50 mm self-compensating circular outlet with an average discharge of 29 l/min (0.54*10 -3 m 3 /sec), obtained at a low-pressure range of 2 -9 kPa and with coefficients of variation less than 0.9%. This modified system was compared to the traditional gated pipe system using the uniformity coefficient and water productivity.…”