干旱区生态环境知识资源中心(Arid): Modeling the behavior of shallow groundwater system in sustaining arid agroecosystems with fragmented land use

Arid

DOI	10.1016/j.agwat.2021.106811
	Modeling the behavior of shallow groundwater system in sustaining arid agroecosystems with fragmented land use
	Xiao, Xue; Xu, Xu; Ren, Dongyang; Huang, Quanzhong; Huang, Guanhua
通讯作者	Xu, X (corresponding author), China Agr Univ, Chinese Israeli Int Ctr Res & Training Agr, Beijing 100083, Peoples R China.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	249
英文摘要	Shallow groundwater often presents multiple behaviors in supporting the sustainability of arid agroecosystems. The behaviors are especially important and complicated for the arid irrigated areas with fragmented land-use types. In the view of understanding the role of shallow groundwater in such areas, the MODFLOW and MT3DMS (with the assistance of HYDRUS-1D) were used to simulate groundwater flow and salt transport in a typical observation site of the arid upper Yellow River basin (YRB). The original MODFLOW was modified with introducing a variable expression of specific yield, aiming to improve the modeling accuracy in shallow groundwater environments. The model was calibrated and validated using the observation data of groundwater depth and drainage in 2013 and 2012, respectively. Groundwater evapotranspiration and lateral water-salt exchange among different land-use types were simulated and analyzed; meanwhile, the dry drainage effect of non cultivated natural land was quantitatively interpreted. Results indicated that the fragmented land-use/planting pattern (with different irrigation scheduling) resulted in significant lateral groundwater flow and water/salt redistribution among different land-use fields during irrigation. The groundwater evapotranspiration ranged at about 160-220 mm for different land-use types, reaching to 0.30-0.45 of plant evapotranspiration (ETpt) during the growing seasons. This effectively supplemented the plant water use in arid climate, especially for the unirrigated cultivated land (during some stages) and the non-irrigated natural land. Meanwhile, the lateral groundwater flow drove salt migrating from the cultivated land to the natural land. The natural land accumulated 27-40% of salts introduced by irrigation, playing a significant role in accommodating salts (i.e. the dry drainage effect). Moreover, our modeling work further implied that the reliable groundwater modeling in arid and shallow groundwater areas required a more detailed model conceptualization and more accurate information of land-use distribution, irrigation scheduling, and local microrelief than the general understanding in the past.
英文关键词	Lateral groundwater flow Groundwater evapotranspiration Salt accumulation Dry drainage Modified MODFLOW and MT3DMS Variable specific yield
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000632323300007
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368836
作者单位	[Xiao, Xue; Xu, Xu; Ren, Dongyang; Huang, Quanzhong; Huang, Guanhua] China Agr Univ, Chinese Israeli Int Ctr Res & Training Agr, Beijing 100083, Peoples R China; [Xiao, Xue; Xu, Xu; Ren, Dongyang; Huang, Quanzhong; Huang, Guanhua] China Agr Univ, Ctr Agr Water Res, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Xiao, Xue,Xu, Xu,Ren, Dongyang,et al. Modeling the behavior of shallow groundwater system in sustaining arid agroecosystems with fragmented land use[J]. 中国农业大学,2021,249.
APA	Xiao, Xue,Xu, Xu,Ren, Dongyang,Huang, Quanzhong,&Huang, Guanhua.(2021).Modeling the behavior of shallow groundwater system in sustaining arid agroecosystems with fragmented land use.AGRICULTURAL WATER MANAGEMENT,249.
MLA	Xiao, Xue,et al."Modeling the behavior of shallow groundwater system in sustaining arid agroecosystems with fragmented land use".AGRICULTURAL WATER MANAGEMENT 249(2021).