Hole irrigation process simulation using a soil water dynamical model with parameter inversion method

doi:10.1016/j.agwat.2020.106542

	Hole irrigation process simulation using a soil water dynamical model with parameter inversion method
	Pan, Zhanpeng 1; Tong, Yu 1; Hou, Jingming 1; Zheng, Jian 2; Kang, Yongde 1; Wang, Yan 2; Cao, Changchong 3
刊名	Agricultural Water Management
	2021-02-28
卷号	245
关键词	Agricultural robots Dynamics Soil moisture Solute transport Water conservation Water resources Water supply Wetting Agricultural irrigation Dynamics of soil moistures Parameter inversion Process simulations Soil moisture dynamics Soil water dynamics Soil water movement Water supply model
ISSN号	03783774
DOI	10.1016/j.agwat.2020.106542
英文摘要	Soil water dynamics are an important part of agricultural irrigation evaluation standards; therefore, supplying water efficiently has become the focus of agricultural water-saving research, and different soil water movement models have been developed for various water supply models. In this work, a parameter inversion model is coupled with the soil water movement equation (the Richards equation) based on the main variable of the head (h)-based Richards equation to investigate the dynamics of soil moisture under hole irrigation. A mathematical model for hole irrigation with two hole diameters (5 cm or 7 cm) and two hole numbers (one or two) was constructed after verifying the model with field-scale soil water content data from different soil profile depths. The Richards equation based on the Gauss–Newton parameter inversion method was found to accurately simulate the soil moisture dynamics under hole irrigation (R2>0.9). The difference in the water content of the soil profile due to the difference in hole diameter did not exceed 2.7%, and the soil water content under single-hole irrigation was significantly higher than that under double-hole irrigation due to lower evaporation. The infiltration distance of the wetting front under single-hole irrigation, which was mainly distributed on the hole side of the planting ridge, was greater than that under double-hole irrigation at 378 ml irrigation water per plant, and the soil moisture was unevenly distributed at a certain depth. However, the wetting fronts under double-hole irrigation intersected and began to infiltrate the soil evenly within a short time (only 6% of the entire irrigation cycle). The results for wetting front movement under the different hole settings show that double-hole irrigation does not stimulate crop root growth on both sides of the plant in the long term; however, this growth pattern can be stimulated by alternating single-hole irrigation. © 2020 Elsevier B.V.
WOS研究方向	Agriculture ; Water Resources
语种	英语
出版者	Elsevier B.V.
WOS记录号	WOS:000606745000004
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147164]
专题	能源与动力工程学院
作者单位	1.State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an; Shaanxi; 710048, China; 2.Western Energy and Environment Research Center, Lanzhou University of Technology, Lan Zhou; 730050, China; 3.China Changjiang Power Co., Ltd, No.1 Jianshe Road, Yichang; Hubei; 443002, China
推荐引用方式 GB/T 7714	Pan, Zhanpeng,Tong, Yu,Hou, Jingming,et al. Hole irrigation process simulation using a soil water dynamical model with parameter inversion method[J]. Agricultural Water Management,2021,245.
APA	Pan, Zhanpeng.,Tong, Yu.,Hou, Jingming.,Zheng, Jian.,Kang, Yongde.,...&Cao, Changchong.(2021).Hole irrigation process simulation using a soil water dynamical model with parameter inversion method.Agricultural Water Management,245.
MLA	Pan, Zhanpeng,et al."Hole irrigation process simulation using a soil water dynamical model with parameter inversion method".Agricultural Water Management 245(2021).