Numerical investigation of wetting front migration and soil water distribution under vertical line source irrigation with different influencing factors

doi:10.2166/ws.2021.054

	Numerical investigation of wetting front migration and soil water distribution under vertical line source irrigation with different influencing factors
	Fan, Yanwei; Ma, Liangjun; Wei, Hujun; Zhu, Pengcheng
刊名	WATER SUPPLY
	2021
卷号	21 期号:5 页码:2233-2248
关键词	HYDRUS-2D numerical simulation soil water distribution vertical line source irrigation wetting front migration
ISSN号	1606-9749
DOI	10.2166/ws.2021.054
英文摘要	Vertical line source irrigation (VLSI) is an underground irrigation method suitable for deep-rooted plants. Understanding the characteristics of the soil wetting body of the VLSI was the key to designing this irrigation system. On the basis of experimental verification of the reliability of the HYDRUS simulation results of VLSI under the conditions of soil texture (ST), initial water content (theta(i)), line source buried depth (B), line source diameter (D) and line source length (L), numerical studies of the migration law of the wetting front of VLSI and the distribution characteristics of soil moisture were performed. The wetting front migration (WFM) was mainly influenced by ST, theta(i), D and L (P < 0.05), while B had little effect on WFM (P > 0.05). The shape of the soil wetting body changed little under different influencing factors. The water content contour was approximately 'ellipsoidal' around the line source. The soil moisture near the line source was close to the saturated moisture content. The moisture content around the line source gradually decreased outward, and the contour lines gradually became dense. According to the simulation results, a prediction model of multiple factors influencing the migration process of the VLSI wetting front was established. The predicted value was in good agreement with the measured value. The results of this research could provide a theoretical basis for further optimizing the combination of VLSI and irrigation elements.
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
语种	英语
出版者	IWA PUBLISHING
WOS记录号	WOS:000634806700001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148350]
专题	能源与动力工程学院
作者单位	Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Fan, Yanwei,Ma, Liangjun,Wei, Hujun,et al. Numerical investigation of wetting front migration and soil water distribution under vertical line source irrigation with different influencing factors[J]. WATER SUPPLY,2021,21(5):2233-2248.
APA	Fan, Yanwei,Ma, Liangjun,Wei, Hujun,&Zhu, Pengcheng.(2021).Numerical investigation of wetting front migration and soil water distribution under vertical line source irrigation with different influencing factors.WATER SUPPLY,21(5),2233-2248.
MLA	Fan, Yanwei,et al."Numerical investigation of wetting front migration and soil water distribution under vertical line source irrigation with different influencing factors".WATER SUPPLY 21.5(2021):2233-2248.