Hydraulic Performance of Different Emitters under Varying Watertank Height

Abstract

Drip or Trickle irrigation system is designed to apply precise amount of water near the plant with a certain degree of uniformity. This study was conducted at the Experimental Farm of the Faculty of Agricultural Sciences, University of Gezira, during January, 2021. The study was aimed to evaluate the hydraulic performance of different emitters types under varying watertank height including: average
discharge (Qavg), discharge variation (Qvar%), coefficient of manufacture variation (CV%), application uniformity (AU%), coefficient uniformity (CU%), distribution uniformity (DU%) and statistical uniformity (Us%). Three emitters type were used under drip irrigation system namely regular gauges, high compensating pressure and low compensating pressure. Three varying tank height including: H1=1m, H2=1.5m and H3=2m.The treatments were laid out in a split plot design with three replications. Results showed that there were significant differences (P≤0.05) in all tested hydraulic performance parameters and their interactions. Discharge values of interaction consider quite good and found to be within the acceptable range. The highest discharge value was obtained by E2H3 emitter, followed by low compensating pressure with tow meter the least by low compensating pressure with tow meter. For CV% the highest value was obtained by regular gauges with one meter, followed by high compensating pressure with tow meter it consider acceptable while the least by regular gauges with one meter and high compensating pressure with tow meter it consider excellent. The highest results of AU%, CU%, DU% and Us% value was obtained by high compensating pressure with one meter, followed by low compensating pressure with one meter it consider excellent, while the least of AU%, CU% and Us% was obtained by regular gauges with one meter and high compensating pressure with tow meter it consider fair. The lowest values of DU% and Us% were obtained by high compensating pressure with tow meter and low compensating pressure with tow meter it consider acceptable. Thus the study recommended that it is more efficient to use high compensating pressure (CP) emitters type with one meter tank hight.