HYDRAULIC STUDIES OF DRIP IRRIGATION SYSTEM UNDER USING LOW QUALITY WATER CONDITIONS

Abstract

Rania Adel Abd-Raboh Al-Kersh: Hydraulic Studies of Drip Irrigation System Under Using Low Quality Water Conditions. Unpublished M.Sc. Thesis, Department of Agricultural Engineering, Faculty of Agriculture, Ain Shams University, 2016. Water characteristics have the majority effect on the hydraulic performance of on-farm irrigation systems and their equipment. Therefore, the aim of this study was to evaluate the hydraulic characterization of surface drip irrigation system and its emitters under saline-water conditions. Herby, laboratory experiment was carried out at water Relations and Field Irrigation Dept., (NRC) to evaluate hydraulic performance of five emitter types and selected the best to applied in the field experiment, which applied in Research and Research and Production Station, NRC, Nubaria, El-Beheara Governorate, Egypt, during 2015/2016 growing season to study the effect of the selected emitters types under different irrigation water salinity on the hydraulic properties of the drip irrigation system, plant growth characters and yield of turnip crop. Lab experiments were conducted to evaluate hydraulic parameters for five emitter types [Non pressure compensating 1emitter (NPC1), Non pressure compensating 2 emitter (NPC2), Non pressure compensating 3 emitter (NPC3), pressure compensating emitter (PC), and Pressure compensating and Self-flushing emitter (PCS)] under water salinity (345, 2000, 4000, 6000; 8000 ppm) and different operation pressure heads (0.8, 1.0, 1.2, 1.4, 1.6, 1.8; 2 bar). Results of a lab experiment, in the case of using NPC1, NPC2 and NPC3 at using water salinity 345, 2000 and 4000 ppm were better in uniformity coefficient, manufacture variation, and clogging ratio. It could be concluded that emitter types of NPC1, NPC2, and NPC3 under using water salinity 345, 2000, and 4000 ppm were the best and could be recommended to apply in the field resear