Influence of sediment composition on clogging of labyrinth channels emitters and deposition in emitter-pipeChinese Full Text
WU Ze-guang;NIU Wen-quan;College of Water Resources and Architectural Engineering,Northwest A＆F University;Institute of Soil and Water Conservation,Chinese Academy of Sciences/Ministry of Water;
Abstract: 【Objective】This paper conducted drip-irrigation tests using muddy water with different sediment compositions to investigate the effects of sediment compositions on emitter clogging.【Method】Combinations of three sediment compositions（A:ratios of particles with diameters of＜0.03mm,≥0.03-≤0.05mm,and＞0.05-≤0.1mm were 58.38%,27.17%,and 14.45%;B:ratios of particles with diameters of＜0.03mm,≥0.03-≤0.05mm,and＞0.05-≤0.1mm were 48.50%,13.20%,and 38.30%;C: ratios of particles with diameters of＜0.03 mm,≥0.03-≤0.05 mm,and ＞0.05- ≤0.1 mm were 20.13%,23.55%,and 56.32%）and three sand levels（0.5,1.0,and 1.5g/L）were tested based on shortperiod repeatability method for anti-clogging experiments.The location of alluvial sediments,size compositions,sediment concentrations and flow changes were analyzed.【Result】When the sediment concentrationwas≤1.0g/L,C was the easiest to cause clogging,followed by B and A.When the sediment concentration was＞1.0g/L,influence of sediment composition on clogging decreased.Sediment deposition appeared in the middle section 0.6-1.0mof emitting-pip when clogging happened,while sediment deposition appeared in the tail when there was no or slight clogging.The sediment particles with size of＞0.05-≤0.1mm easily deposited in the emitter-pips,while particles with size of＜0.03mm could be discharged from the emitters easily.【Conclusion】Sediment composition was the main factor of emitter clogging.When the size of particles was＞0.05mm,it easily caused clogging.Sediment composition had small effect on the location of sediment siltation,but had certain influence on sedimentation volume.
Keywords：
drip-irrigation system; labyrinth channel; composition of sediment; sediment concentration; emitter clogging;
- DOI：
10.13207/j.cnki.jnwafu.2014.05.027
- Series：
- Subject：
- Classification Code：
S275.6
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