Abstract：In order to investigate the possibility of drip irrigation with the Yellow River water filtered with 300 mesh, an experiment simulating a field drip irrigation system was carried out to study the process flow changes of Nf 0.72, Nf1.60, Nf2.20, Dy1.38 at different locations, the law of system average relative flow, the coefficient of variation of emitter discharge, and the system uniformity, as well as relationships between them. The results showed that the emitter clogging developed rapidly early on, the average relative flow rate of all systems showed a law of gradual change at first, followed by a rapid decline, then returning to a gradual rate of change with the increase of irrigation frequency, with the point of rapid decline at the average relative flow of 75%. The coefficient of variation of emitter discharge, which increases linearly from the beginning and then continues to run smoothly, is a strong linear relationship(p<0.001)with the system mean relative flow. When the system average relative flow is greater than 75%, drip irrigation systems Christiansen uniformity coefficient Cu and Ln Qr is a linear relationship(R2=0.790 9), therefore, it is practical to determine the drip irrigation system uniformity through the average relative flow, thus grasping the system clogged conditions in time and decision-making conveniently for its operation and management.
孙贯芳, 于健, 杜斌, 屈忠义, 史吉刚, 张瑞喜. 过滤后黄河水对滴灌系统的影响[J]. 排灌机械工程学报, 2015, 33(10): 901-907.
Sun Guanfang, Yu Jian, Du Bin, Qu Zhongyi, Shi Jigang, Zhang Ruixi. Influence of the Yellow River water filtered on drip irrigation system. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(10): 901-907.
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