Effect of Lateral Flushing on Emitter Clogging under Drip Irrigation with Yellow River Water and a Suitable Method

Abstract

Lateral flushing is expected to become an important means of controlling emitter clogging in drip irrigation systems. This research investigated the effect of different flushing frequencies (once every 32, 64, 96 and 128 h) and flushing velocities (0.2, 0.4 and 0. m s−1) on emitter clogging. The experimental results showed that the substances that clogged the emitters mainly come from the cast of internal laterals, and could be effectively controlled by lateral flushing. And emitter clogging was most effectively relieved for the frequency of once per 64 h, and the velocity of 0.4 m s−1. The discharge ratio variation (Dra) and the coefficient of uniformity (CU) of the drip irrigation system, increased from 7.7 to 21.9% and 11.6 to 67.4%, respectively, compared with non‐flushed laterals. Also, as the frequency increased, Dra and CU first decreased and then increased. Similarly, with the increase of flushing velocity, Dra and CU also decreased then increased. In conclusion, for the drip irrigation system with YRW, the suitable lateral flushing velocity was found to be 0.4 m s−1 at a frequency of once per 64 h. Copyright © 2017 John Wiley & Sons, Ltd.

Estudio del atascamiento de goteros mediante distintos índices de calidad del riego usando aguas regeneradas

“…Así pues, las labores de mantenimiento pueden ayudar a reducir los niveles de atascamiento como han encontrado otros autores. Por ejemplo, labores periódicas de lavado de laterales de riego que ayudan a mejorar los índices de atascamiento de los goteros (Li et al, 2015;Han et al, 2018;; mantenimiento del pH de la solución de riego en valores determinados para evitar la formación de precipitados (Katz et al 2014;Contreras et al, 2016, Song et al, 2017 o un post-riego de corta duración sin fertilizante para retirar la solución nutritiva de los ramales (Baeza et al, 2019). Es de destacar que los índices de D ra , CU y CE han dado diferencias significativas entre los tres tratamientos, obteniéndose los mejores resultados según mismo orden en todos ellos.…”

Effects of the chlorination and pressure flushing of drippers fed by reclaimed wastewater on biofouling

“…The effectiveness of cleaning methods is often looked at through flow maintenance (Feng et al, 2018;Han et al, 2018;Song et al, 2017). Chlorination (1.5 ppm) used alone or in combination with pressure flushing (Cl and PFCl), maintained flow rates and reduced distribution heterogeneity throughout the cleaning period.…”

“…To be effective, flushing must be carried out often enough and at an appropriate rate to dislodge and transport accumulated sediment. The minimum flow velocity for flushing the drip irrigation system is 0.3-0.6 m s -1 , thus removing clogging and particulate matter (Han et al, 2018;Lamm et al, 2007;Li et al, 2018). As for chlorination, the frequency of flushing (weekly to monthly) directly influences the efficiency of the method and the service life of the drip irrigation system (Lamm, 2013;Li et al, 2015Li et al, , 2018Puig-Bargués et al, 2010).…”

Experimental Study on the Sedimentation Performance of an Arc-Plate Linear Sedimentation Tank

“…Therefore, water-saving irrigation technology is extensively employed [4,5]. However, due to the high sediment content in diversion irrigation water, blockage and wear [6][7][8][9][10] are common issues faced by micro-irrigation system equipment. To address this problem effectively, sedimentation tanks are frequently installed at the beginning of the irrigation system for the sedimentation treatment of water containing sand [11].…”