Influence of fine particle size and concentration on the clogging of labyrinth emitters

Niu, Wenquan; Lü, Linnü; Chen, Xue

doi:10.1007/s00271-012-0328-2

Cited by 73 publications

(67 citation statements)

References 11 publications

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“…Nearing et al (1997) examined the quantitative relationships of the rill detachment rate, runoff depth and slope gradient through variable slope experiments. Niu et al (2013) evaluated the relationship between sediment supply and output and observed that rill detachment is relatively independent of the actual sediment http://dx.doi.org/10.1016/j.jhydrol.2017.03.065 0022-1694/Ó 2017 Elsevier B.V. All rights reserved. discharge.…”

Section: Introductionmentioning

confidence: 99%

Analytical method for determining rill detachment rate of purple soil as compared with that of loess soil

Xiao-yan

Huang

et al. 2017

Journal of Hydrology

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Section: Introductionmentioning

confidence: 99%

Analytical method for determining rill detachment rate of purple soil as compared with that of loess soil

Xiao-yan

Huang

et al. 2017

Journal of Hydrology

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“…The deposition of particles in corners is related to the recirculation zones and low velocity that promotes the trapping of particles [19, 20]. In addition, the successive cycles of operation every 8 h allow particles to deposit in the pipes and labyrinths when the system is turned off.…”

Section: Resultsmentioning

confidence: 99%

Methodology to Evaluate Dripper Sensitivity to Clogging due to Solid Particles: An Assessment

Lavanholi

Oliveira

Camargo

et al. 2018

The Scientific World Journal

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Emitter clogging is a major problem in microirrigation systems, which may result from the isolated or combined effects of physical, chemical, and biological agents. Clogging caused by suspended solid particles is the most common plugging form of emitters. Water quality and emitter geometry are key aspects in clogging processes. Any suitable test procedure to assess the sensitivity of drippers to clogging should take into account the predominant factors that influence clogging and must reproduce the field conditions. This research set out to assess the performance and suitability of a laboratory clogging test procedure in order to validate a methodology and to provide scientific results that may support the standardization of a clogging test method. The evaluated methodology has been used by the IRSTEA laboratory since 1974 (Platform of Research and experiment on Science and Technology for Irrigation - PReSTI, formerly LERMI) and its contents are currently being discussed by the ISO TC23/SC18 committee. The aim is to define a standardized testing protocol to evaluate the sensitivity of emitters to clogging due to solid particles. Replications analyzing the clogging resistance of four models of emitting pipes were carried out in a laboratory. The clogging test procedure enabled an accurate assessment of the combinations of concentration and size of particles that caused clogging in each model of dripper. However, a significant variability in degree of clogging was identified when the results of replications for each model of dripper were compared. Several requirements, concerns, and improvements related to the clogging test protocol were discussed.

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“…The particle image velocimetry method was used to follow the motion of granules to analyse the accumulation and clogging of sands (Li et al, 2008;Yu et al, 2009;Wei et al, 2012). Owing to micro-water dynamic action such as cementation, flocculation, and transportation, tiny sediments entering irrigation drippers tend to form large aggregates and block the emitters (Li et al, 2012a;Niu et al, 2013). Some researchers tried to increase the dynamic performance of the flow field and decrease the region of low flow rates to enhance the anti-clogging function of emitters and solve the aforementioned problem Wang et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Influence of Flushing Pressure before Irrigation on the Anti‐Clogging Performance of Labyrinth Channel Emitters

Yang

et al. 2017

Irrigation and Drainage

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This study aimed to investigate the influence of different pressures on the distribution of particle sizes of deposited sediments and discharged sands in the process of flushing, using cylindrical labyrinth channel emitters. Flushing was performed for 2 min before each irrigation under 0.15, 0.20, 0.25 and 0.30 MPa of pressure. The variation in flow discharge with irrigation times was measured after flushing, and a Malvern laser particle size analyser was employed to analyse the gradation of discharged sands. The results of this study suggested that irrigation time with normal outflow rate was remarkably extended and the anti‐clogging performance of emitters was obviously promoted by the increase in flushing pressures. Moreover, the emitters were sensitive to particles larger than 6.607 μm in diameter, which tended to be retained in the flow paths. In contrast, particles smaller than 6.607 μm in diameter flowed out of the labyrinth channel easily. Furthermore, the flushing pressure had a major impact on the larger particles of discharged sediments, whereas it had a minor effect on smaller particles. Increasing flushing pressures appropriately could effectively increase the passing rate of larger particles, thereby extending the lifespan of emitters. Therefore, it is advised to perform high‐pressure flushing for 2–3 min before each irrigation to prevent the clogging of emitters. Copyright © 2017 John Wiley & Sons, Ltd.

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Influence of fine particle size and concentration on the clogging of labyrinth emitters

Cited by 73 publications

References 11 publications

Analytical method for determining rill detachment rate of purple soil as compared with that of loess soil

Analytical method for determining rill detachment rate of purple soil as compared with that of loess soil

Methodology to Evaluate Dripper Sensitivity to Clogging due to Solid Particles: An Assessment

Influence of Flushing Pressure before Irrigation on the Anti‐Clogging Performance of Labyrinth Channel Emitters

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