干旱区生态环境知识资源中心(Arid): A novel regional irrigation water productivity model coupling irrigation- and drainage-driven soil hydrology and salinity dynamics and shallow groundwater movement in arid regions in China

Arid

DOI	10.5194/hess-24-2399-2020
	A novel regional irrigation water productivity model coupling irrigation- and drainage-driven soil hydrology and salinity dynamics and shallow groundwater movement in arid regions in China
	Xue, Jingyuan 1; Huo, Zailin 1; Wang, Shuai 1; Wang, Chaozi 1; White, Ian 2; Kisekka, Isaya 3,4; Sheng, Zhuping 5; Huang, Guanhua 1; Xu, Xu 1
通讯作者	Huo, Zailin
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
ISSN	1027-5606
EISSN	1607-7938
出版年	2020
卷号	24 期号:5 页码:2399-2418
英文摘要	The temporal and spatial distributions of regional irrigation water productivity (RIWP) are crucial for making decisions related to agriculture, especially in arid irrigated areas with complex cropping patterns. Thus, in this study, we developed a new RIWP model for an irrigated agricultural area with complex cropping patterns. The model couples the irrigation- and drainage-driven soil water and salinity dynamics and shallow groundwater movement in order to quantify the temporal and spatial distributions of the target hydrological and biophysical variables. We divided the study area into 1 km x 1 km hydrological response units (HRUs). In each HRU, we considered four land use types: sunflower fields, wheat fields, maize fields, and uncultivated lands (bare soil). We coupled the regional soil hydrological processes and groundwater flow by taking a weighted average of the water exchange between unsaturated soil and groundwater under different land use types. The RIWP model was calibrated and validated using 8 years of hydrological variables obtained from regional observation sites in a typical arid irrigation area in North China, the Hetao Irrigation District. The model simulated soil moisture and salinity reasonably well as well as groundwater table depths and salinity. However, overestimations of groundwater discharge were detected in both the calibration and validation due to the assumption of well-operated drainage ditch conditions; regional evapotranspira- tion (ET) was reasonably estimated, whereas ET in the uncultivated area was slightly underestimated in the RIWP model. A sensitivity analysis indicated that the soil evaporation coefficient and the specific yield were the key parameters for the RIWP simulation. The results showed that the RIWP decreased from maize to sunflower to wheat from 2006 to 2013. It was also found that the maximum RIWP was reached when the groundwater table depth was between 2 and 4 m, regardless of the irrigation water depth applied. This implies the importance of groundwater table control on the RIWP. Overall, our distributed RIWP model can effectively simulate the temporal and spatial distribution of the RIWP and provide critical water allocation suggestions for decision-makers.
类型	Article
语种	英语
国家	Peoples R China ; Australia ; USA
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000535187900001
WOS关键词	DEFICIT IRRIGATION ; RIVER-BASIN ; YIELD ; WHEAT ; BALANCE ; SALT ; CROP ; SENSITIVITY ; IMPROVEMENT ; MANAGEMENT
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
来源机构	中国农业大学 ; University of California, Davis
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319084
作者单位	1.China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China; 2.Australian Natl Univ, Fenner Sch Environm & Soc, Fenner Bldg 141, Canberra, ACT 0200, Australia; 3.Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA; 4.Univ Calif Davis, Dept Biol & Agr Engn, Davis, CA 95616 USA; 5.Texas A&M AgriLife Res Ctr, El Paso, TX 79927 USA
推荐引用方式 GB/T 7714	Xue, Jingyuan,Huo, Zailin,Wang, Shuai,et al. A novel regional irrigation water productivity model coupling irrigation- and drainage-driven soil hydrology and salinity dynamics and shallow groundwater movement in arid regions in China[J]. 中国农业大学, University of California, Davis,2020,24(5):2399-2418.
APA	Xue, Jingyuan.,Huo, Zailin.,Wang, Shuai.,Wang, Chaozi.,White, Ian.,...&Xu, Xu.(2020).A novel regional irrigation water productivity model coupling irrigation- and drainage-driven soil hydrology and salinity dynamics and shallow groundwater movement in arid regions in China.HYDROLOGY AND EARTH SYSTEM SCIENCES,24(5),2399-2418.
MLA	Xue, Jingyuan,et al."A novel regional irrigation water productivity model coupling irrigation- and drainage-driven soil hydrology and salinity dynamics and shallow groundwater movement in arid regions in China".HYDROLOGY AND EARTH SYSTEM SCIENCES 24.5(2020):2399-2418.