干旱区生态环境知识资源中心(Arid): Development and Application of a Water and Salt Balance Model for Well-Canal Conjunctive Irrigation in Semiarid Areas with Shallow Water Tables

Arid

DOI	10.3390/agriculture12030399
	Development and Application of a Water and Salt Balance Model for Well-Canal Conjunctive Irrigation in Semiarid Areas with Shallow Water Tables
	Liu, Yannan; Zhu, Yan; Mao, Wei; Sun, Guanfang; Han, Xudong; Wu, Jingwei; Yang, Jinzhong
通讯作者	Mao, W
来源期刊	AGRICULTURE-BASEL
EISSN	2077-0472
出版年	2022
卷号	12 期号:3
英文摘要	Irrigated agriculture in arid and semi-arid regions is seriously threatened by water shortage and soil salinization. The well-canal conjunctive irrigation scheme provides a stable groundwater resource for irrigation and can reduce surface salt accumulation by decreasing the groundwater levels, which makes it more suitable to alleviate the problems of irrigated agriculture in arid and semi-arid regions. However, the soil salinization process requires assessment on regional spatial and decadal time scales, as it is a continuous but slow change. Therefore, a water and salt balance model (WSBM) for well-canal conjunctive irrigation is developed herein to obtain long-term predictions of regional root zone salinity dynamics in canal- and well-irrigated areas. In the developed model, the characteristic length of the well-canal conjunctive irrigated area (L-c) is used to couple the canal-and well-irrigated areas. The performance of the WSBM as well as a sensitivity analysis and the value rule of the special parameter L-c are evaluated by comparing the simulation results with those derived from the MODFLOW. The results demonstrate the validity of the developed model, and the special parameter L-c is found to be insensitive, with a value approximately two-thirds of the center distance when the canal and well irrigation districts are regularly adjacent or centrosymmetric. Moreover, when a real-world application is adopted, the water table depth and root-zone soil salinity are simulated in the Longsheng well-canal irrigation area in the Hetao Irrigation District, Inner Mongolia, China. Water table depth and soil salinity collected from 2002-2005 and from 2006-2020 are used to calibrate and validate the model. The calibrated model is subsequently used to predict soil salinity dynamics in the next 100 years under current and future water-saving conditions. The predictions indicate that the soil salinity is basically stable at a relatively low level (<0.2 kg/100 kg) under current irrigation practices. The study could support planning making before implementation of well-canal conjunctive irrigation.
英文关键词	well-canal conjunctive irrigation soil salinity dynamics Hetao Irrigation District water table depth
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000775368800001
WOS关键词	SOIL-SALINITY ; SURFACE-WATER ; CLIMATE-CHANGE ; GROUNDWATER ; DYNAMICS ; SALINIZATION ; DISTRICT ; HETAO ; MANAGEMENT ; RESOURCES
WOS类目	Agronomy
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391671
推荐引用方式 GB/T 7714	Liu, Yannan,Zhu, Yan,Mao, Wei,et al. Development and Application of a Water and Salt Balance Model for Well-Canal Conjunctive Irrigation in Semiarid Areas with Shallow Water Tables[J],2022,12(3).
APA	Liu, Yannan.,Zhu, Yan.,Mao, Wei.,Sun, Guanfang.,Han, Xudong.,...&Yang, Jinzhong.(2022).Development and Application of a Water and Salt Balance Model for Well-Canal Conjunctive Irrigation in Semiarid Areas with Shallow Water Tables.AGRICULTURE-BASEL,12(3).
MLA	Liu, Yannan,et al."Development and Application of a Water and Salt Balance Model for Well-Canal Conjunctive Irrigation in Semiarid Areas with Shallow Water Tables".AGRICULTURE-BASEL 12.3(2022).