干旱区生态环境知识资源中心(Arid): Evaluation of the most proper management scale on water use efficiency and water productivity: A case study of the Heihe River Basin, China

Arid

DOI	10.1016/j.agwat.2020.106671
	Evaluation of the most proper management scale on water use efficiency and water productivity: A case study of the Heihe River Basin, China
	Zhou, Qing; Zhang, Yali; Wu, Feng
通讯作者	Wu, F (corresponding author), Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	246
英文摘要	Increasing agricultural water use efficiency (WUE) and water productivity (WP) is imperative to alleviate water scarcity and achieve sustainable agriculture in inland river basins. The confusion on the use of the two indicators at demarcated scales in this issue has been addressed. Analysis of the literature, however, lacks evaluation of the most proper management scale. The Heihe River Basin (HRB) in China was selected as the study area and WUE and WP were calculated spatially at the field crop, irrigation district, and county scales using the remote sensing-based evapotranspiration (ET), grid rainfall, land use, and statistical data. In addition, the most proper management scale was firstly evaluated by comparing WUE and WP based on statistical properties and spatial distributions. The results show that higher WUE and WP were observed at the field crop scale. The differences between WUE and WP are significant at field crop scale but the gap narrows with increasing spatial scale. Spatial analysis reveals that WP was higher in the plain oasis area and lower in the mountainous and desert oasis area. Among three scales, the WUE and WP are relatively lower and the variances of them are relatively larger at the irrigation district scale. WUE ranges from 0.1 to 0.85 (mean 0.34) and WP varies from 0.08 kg/m(3) to 0.8 kg/m(3) (mean 0.48 kg/m(3)) across irrigation districts in the whole basin. The large differences indicate the presence of a tremendous management gap among irrigation districts. We thus declare that mesoscale views are more suitable and irrigation district scale is the most proper management scale for resolving water resource utilization problems in arid river basins. Further, agricultural water management at the irrigation district scale should target at improving irrigation technology and adjusting crop structure.
英文关键词	Water use efficiency Water productivity Optimum management scale Irrigated agriculture River basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000611820000001
WOS关键词	IRRIGATION PERFORMANCE ; FOOD SECURITY ; EVAPOTRANSPIRATION ; CONSERVATION ; AGRICULTURE ; CONSUMPTION ; TEMPERATURE ; CHALLENGES ; IMPACTS ; LANDSAT
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347640
作者单位	[Zhou, Qing] Huazhong Agr Univ, Coll Publ Adm, Wuhan 430070, Peoples R China; [Zhang, Yali; Wu, Feng] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Qing,Zhang, Yali,Wu, Feng. Evaluation of the most proper management scale on water use efficiency and water productivity: A case study of the Heihe River Basin, China[J]. 中国科学院地理科学与资源研究所,2021,246.
APA	Zhou, Qing,Zhang, Yali,&Wu, Feng.(2021).Evaluation of the most proper management scale on water use efficiency and water productivity: A case study of the Heihe River Basin, China.AGRICULTURAL WATER MANAGEMENT,246.
MLA	Zhou, Qing,et al."Evaluation of the most proper management scale on water use efficiency and water productivity: A case study of the Heihe River Basin, China".AGRICULTURAL WATER MANAGEMENT 246(2021).