干旱区生态环境知识资源中心(Arid): Development and application of a monthly water and salt balance model for seasonally frozen agricultural and non-agricultural areas with shallow groundwater table

Arid

DOI	10.1016/j.catena.2023.107701
	Development and application of a monthly water and salt balance model for seasonally frozen agricultural and non-agricultural areas with shallow groundwater table
	Sun, Guanfang; Zhu, Yan; Mao, Wei; Li, Yonghong; Yang, Jinzhong; Gao, Zhaoliang
通讯作者	Zhu, Y ; Gao, ZL
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2024
卷号	235
英文摘要	Long-term water and salt predictions in seasonally frozen arid agricultural regions with shallow groundwater tables are important for water conservation and soil salinity control. In this study, we developed a monthly water and salt balance model. The water balance model was built to obtain the water flux in the vertical layers and the water exchange between agricultural and non-agricultural areas. In the frozen period, the upward water flux from the groundwater was calculated using a function which considered the water table depth and the negative accumulated temperature, and the volume of groundwater entering the root zone was estimated by the thickness of the root zone and frozen depth. With regards to frozen soil, the model considered salt diffusion and expulsion as well as convection. Only four additional parameters were required to estimate the water and salt processes during the freeze-thaw period. Soil salinity and water table depth data from 1999 to 2018 were used to calibrate and validate the model in a seasonally frozen agricultural district in the Hetao Irrigation District (HID), China. The mean relative error (MRE) of water table depth and averaged soil salt content was-4.29 % and 8.65 %, and the root mean square error (RMSE) was 0.38 m and 0.02 g/100 g during the validation period of 2010-2018. The validated model was used to simulate future long-term soil salinity under different autumn irrigation. The results showed that increasing autumn irrigation water can decrease root zone soil salinity during the autumn irrigation period, but it has a limited effect on long-term annual average soil salinity. The groundwater table becomes shallower with increasing irrigation water in autumn, which results in greater upward salt in the adjacent freeze-thaw and crop-growing periods. This study offers a new perspective on reducing autumn irrigation in HID.
英文关键词	Soil salinity Freeze-thaw modelling Hydrological processes Cold/arid region Shallow groundwater Hetao irrigation district Autumn irrigation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001126223500001
WOS关键词	HETAO IRRIGATION DISTRICT ; SOIL-SALINITY ; HEAT-TRANSPORT ; DRY DRAINAGE ; SALINIZATION ; DYNAMICS ; MANAGEMENT ; SOLUTE ; SUSTAINABILITY ; IMPACTS
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403125
推荐引用方式 GB/T 7714	Sun, Guanfang,Zhu, Yan,Mao, Wei,et al. Development and application of a monthly water and salt balance model for seasonally frozen agricultural and non-agricultural areas with shallow groundwater table[J],2024,235.
APA	Sun, Guanfang,Zhu, Yan,Mao, Wei,Li, Yonghong,Yang, Jinzhong,&Gao, Zhaoliang.(2024).Development and application of a monthly water and salt balance model for seasonally frozen agricultural and non-agricultural areas with shallow groundwater table.CATENA,235.
MLA	Sun, Guanfang,et al."Development and application of a monthly water and salt balance model for seasonally frozen agricultural and non-agricultural areas with shallow groundwater table".CATENA 235(2024).