干旱区生态环境知识资源中心(Arid): Optimal groundwater depth and irrigation amount can mitigate secondary salinization in water-saving irrigated areas in arid regions

Arid

DOI	10.1016/j.agwat.2024.109007
	Optimal groundwater depth and irrigation amount can mitigate secondary salinization in water-saving irrigated areas in arid regions
	Li, Wenhao; Kang, Shaozhong; Du, Taisheng; Ding, Risheng; Zou, Minzhong
通讯作者	Kang, SZ
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2024
卷号	302
英文摘要	Secondary salinization poses a significant threat to the sustainable development of water-saving irrigation districts. This study aims to explore the spatial and temporal variations in soil salinity and the factors influencing these changes in water-saving irrigation areas in the inland arid regions of Northwest China. The Manas River Irrigation District was selected as the study area. A grid measuring 10 km x 14 km grid was designed to determine the latitude and longitude coordinates of the grid centers, resulting in 66 sample points. Soil samples were collected from these points in 2013, 2014, 2020, and 2021 from the 0100 cm layer to obtain salinity data. Based on existing research and practical conditions in water-saving irrigation areas, 11 factors influencing soil salinity changes were identified, including irrigation area and irrigation amount. Classical statistical methods and interpretable machine learning techniques were employed to analyze the distribution characteristics of soil salinity and the influencing factors. This analysis proposes effective solutions to mitigate potential secondary salinization in irrigation areas. The results revealed that soil salinity in the irrigation area belonged to moderate variation (C-v = 46.74 %51.80 %). The horizontal direction of the irrigation area shows higher salt content in the upstream and downstream areas, and a gradual decrease in variability with increasing depth characterizes the vertical direction. From 2013-2021, soil salinization in the irrigation area gradually decreased. In 2013 and 2014, the area was predominantly covered by mild saline-alkali soil, accounting for 75.1 % and 76.6 % of the total area, respectively. However, in 2020 and 2021, non-saline soils became dominant, covering 60.9 % and 66.5 % of the total irrigation area, respectively. In order of importance, the factors affecting the spatial and temporal evolution of soil salinity are groundwater depth, annual water surface evaporation, water-saving irrigation area, underground water diversion amount, mineralization of groundwater, irrigation amount, surface water diversion amount, and annual rainfall. In the oasis irrigation area, maintaining a groundwater depth of 4.06.0 m and an irrigation amount of 55006000 m(3) ha(-1) can alleviate the problem of secondary salinization that may result from large-scale development of water-saving irrigation. The findings of this study provide a basis for the prevention and control of soil salinization in water-saving irrigation areas and the development and management of saline land in oasis areas.
英文关键词	Water saving irrigation district Soil salinity Spatiotemporal variability Influencing factor Regulation scheme Regulation scheme
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001300178900001
WOS关键词	MULCHED DRIP IRRIGATION ; SOIL-SALINITY ; XINJIANG ; OASIS ; VARIABILITY ; QUALITY ; RISK
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/402690
推荐引用方式 GB/T 7714	Li, Wenhao,Kang, Shaozhong,Du, Taisheng,et al. Optimal groundwater depth and irrigation amount can mitigate secondary salinization in water-saving irrigated areas in arid regions[J],2024,302.
APA	Li, Wenhao,Kang, Shaozhong,Du, Taisheng,Ding, Risheng,&Zou, Minzhong.(2024).Optimal groundwater depth and irrigation amount can mitigate secondary salinization in water-saving irrigated areas in arid regions.AGRICULTURAL WATER MANAGEMENT,302.
MLA	Li, Wenhao,et al."Optimal groundwater depth and irrigation amount can mitigate secondary salinization in water-saving irrigated areas in arid regions".AGRICULTURAL WATER MANAGEMENT 302(2024).