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Spatial distribution of clogging substances in drip irrigation emitters fed with reclaimed water

文献类型： 外文期刊

作者： Yao, Yuqian 1 ; Shen, Yan 1 ; Ma, Changjian 3 ; Zhang, Kai 1 ; Li, Jingzhi 1 ; Xiao, Yang 1 ; Li, Yunkai 1 ;

作者机构： 1.China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China

2.Minist Educ, Engn Res Ctr Agr Water Saving & Water Resources, Beijing 100083, Peoples R China

3.Shandong Acad Agr Sci, Inst Agr Resources & Environm, State Key Lab Nutrient Use & Management, Jinan 250100, Peoples R China

关键词： Emitter clogging; Industrial computed tomography; Spatial distribution; Emitter flow channel

期刊名称：IRRIGATION SCIENCE （ 影响因子：3.1； 五年影响因子：3.3 ）

ISSN： 0342-7188

年卷期： 2024 年

页码：

收录情况： SCI

摘要： Utilizing reclaimed water by drip irrigation technology proves to be an effective strategy for mitigating agricultural water scarcity. Nevertheless, the formation of clogging substances within emitter flow channels poses a significant impediment to the advancement of this technology. Currently, there is a limited understanding of the mechanisms governing the formation of clogging substances in emitter flow channels, primarily due to their semi-closed and narrow characteristics. This study employed industrial computed tomography to delineate the spatial distribution of clogging substances in emitter flow channels and elucidate critical regions prone to substance accumulation. The findings revealed that clogging substances were predominantly situated on the top and substrate faces of the emitter flow channels, comprising 35.7-50.0% and 36.9-44.4% of the total, respectively. In contrast, distribution on the upstream, downstream, and root faces was minimal, each contributing less than 25% to the total. Moreover, there was a notable accumulation of clogging substances at the front of the flow channel, displaying a significant decrease towards the flow direction. The average volume fractions of clogging substances in the front, middle, and back of the flow channel were 7.5-22.8%, 9.0-20.2%, and 6.5-18.7%, respectively. To mitigate emitter clogging, it is recommended to focus on controlling clogging substances on the top and substrate faces, and at the front of the emitter flow channel. In conclusion, this study provides valuable insights into the spatial distribution of emitter clogging substances, paving the way for the development of anti-clogging emitters and the promotion of reclaimed water irrigation technology.

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