TREATED WASTEWATER IMPACT ON PRESSURIZED IRRIGATION SYSTEMS PERFORMANCE

Abstract

The aim of these study is to investigate the effect of using treated wastewater on pressurized irrigation system, soil and cultivated plant. All field experiments were carried out in the experimental farms at Al-Gabal Al-Asfar, El-Al-Khankah, Al-Qalyubia Governorateat at 30˚12 ̏ 07.9 N, 31˚24 ̏ 39.7 E. (20 x 45) m2 plot area was selected for carrying out the experiments. The main plot was divided to two sub plots (20 x 25) m2 for drip irrigation system, (20 x 20) m2 for mini sprinkler irrigation system. Results indicated that the use of drip irrigation system was the best, when the emission uniformity was (80.81 – 68.75 – 83.17 – 89.39) % for emitters (2l/h self, 2l/h non self, 8l/h self and 8l/h non self) respectively. Accumulative clogging ratio was range of (2.87 – 16.64), (3.21 – 37.98), (5.04 – 11.3) and (1.3 – 19.2) % respectively. Percentage of roughness at main lines by using treated wastewater was higher than fresh water, which was (24.37) %, and sediments by using fresh water was higher than treated wastewater, which was (47.31) %. At sub main lines roughness by using treated wastewater was higher than fresh water, which was (10, 43.75) % for drip and sprinkler systems respectively, and sediments by using fresh water was higher than treated wastewater, which was (48.78, 6.25) % for drip and sprinkler systems respectively. At manifold lines roughness by using treated wastewater was higher than fresh water, which was (55.6, 98.8) % for drip and sprinkler systems respectively, and sediments by using fresh water was higher than treated wastewater, which was (60, 1.18) %.