气候变化领域集成服务门户(CCPortal): A bidirectional model for simulating soil water flow and salt transport under mulched drip irrigation with saline water

CCPortal

DOI	10.1016/j.agwat.2014.07.021
	A bidirectional model for simulating soil water flow and salt transport under mulched drip irrigation with saline water
	Chen, Li-Juan; Feng, Qi; Li, Feng-Rui; Li, Chang-Sheng
发表日期	2014
ISSN	0378-3774
EISSN	1873-2283
卷号	146
英文摘要	Here, we present a mathematical model for simulating both soil water flow and salt transport in two directions (perpendicular and parallel to the drip tubing) under mulched drip irrigation with saline water. We evaluated the effectiveness of this model by comparing the simulated values with observed data from the field experiment (one treatment with three replications was imposed with irrigation water electrical conductivity of 4.0 dS m(-1) and amounts of 2400 m(3) ha(-1) under mulched drip irrigation system). The results demonstrated that the model performed reliably in the simulation of water flow and salt transport under field conditions. In addition, the model was also used to simulate the spatial distribution patterns of soil water and salt in the two directions in relation to different treatments of irrigation quantity and quality. The simulation demonstrated that the volume of wetted soil was affected by both the plastic mulching and irrigation amount. The wetted region was expanded to the middle of the plastic mulching when the irrigation amount was high and the uniformity of irrigation increased with increasing irrigation volume. Soil water content in the direction parallel to the drip tubing was higher than that perpendicular to the tubing at the same distance, indicating that the wetting fronts overlapped more rapidly in the direction parallel to the drip tubing. The soil salt concentration was high at the edges of the wetting front, with a fairly large desalinated area immediately underneath and adjacent to the drippers. The model presented here offers an efficient approach to investigating the mechanisms underlying soil water flow and salt transport and for designing mulched drip irrigation systems with saline water. (C) 2014 Elsevier B.V. All rights reserved.
关键词	Soil water Soil salinity Drip irrigation Saline water irrigation HYDRUS-2D
学科领域	Agriculture; Water Resources
语种	英语
WOS研究方向	Agronomy ; Water Resources
来源期刊	AGRICULTURAL WATER MANAGEMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111740
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Chen, Li-Juan,Feng, Qi,Li, Feng-Rui,et al. A bidirectional model for simulating soil water flow and salt transport under mulched drip irrigation with saline water[J]. 中国科学院西北生态环境资源研究院,2014,146.
APA	Chen, Li-Juan,Feng, Qi,Li, Feng-Rui,&Li, Chang-Sheng.(2014).A bidirectional model for simulating soil water flow and salt transport under mulched drip irrigation with saline water.AGRICULTURAL WATER MANAGEMENT,146.
MLA	Chen, Li-Juan,et al."A bidirectional model for simulating soil water flow and salt transport under mulched drip irrigation with saline water".AGRICULTURAL WATER MANAGEMENT 146(2014).