干旱区生态环境知识资源中心(Arid): Spatial optimization of cropping pattern in the upper-middle reaches of the Heihe River basin, Northwest China

Arid

DOI	10.1016/j.agwat.2022.107479
	Spatial optimization of cropping pattern in the upper-middle reaches of the Heihe River basin, Northwest China
	Liu, Qi; Niu, Jun; Wood, Jeffrey D.; Kang, Shaozhong
通讯作者	Niu, J
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2022
卷号	264
英文摘要	Agriculture has by far the largest water footprint of human activities. Improving the water productivity of crop production is key to enhancing both water and food security. Irrigation is a significant pressure on water resources in the arid region of Northwest China. Here, we examine optimizing the regional cropping distribution within the Heihe River basin for achieving the dual goals of improving productivity and reducing irrigation water demand. The Soil and Water Assessment Tool (SWAT) and a cellular automata model are employed to model the processes of cropping pattern changes. The optimization takes the maximum of crop water productivity (CWP), the maximum economic water productivity (EWP) and the maximum nutrient water productivity (NWP) as the objective function. The model optimizes the spatial distribution of six crops including corn, spring wheat, spring barley, spring canola-Polish, alfalfa and upland cotton. Results show that under the premise of considering food security, the maximization of water productivity for CWP, EWP, and NWP, leads to the reduction of corn planting area and the eastward shift of corn planting region. A significant decrease in the proportion of wheat planting occurs in the objective of EWP maximization, while the planting proportion of barley and canola increased significantly. All three optimization objectives yield cropping distributions that reduce the irrigation water demand of cultivated land and improve the water productivity of the basin, among which maximizing CWP scenario has the greatest water-saving intensity. Furthermore, from the perspective of ecosystem services, the cropping distribution of maximizing EWP is more reasonable for the basin. Different cropping change scenarios provide effective references for decision makers to make a reasonable cropping distribution in the region.
英文关键词	Regional cropping distribution SWAT model Cellular automata model Water productivity Irrigation water demand Ecosystem services value
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000792912700002
WOS关键词	AGRICULTURAL WATER PRODUCTIVITY ; CELLULAR-AUTOMATA MODELS ; ECOSYSTEM SERVICE VALUE ; LAND-USE CHANGE ; CLIMATE-CHANGE ; RESOURCES ALLOCATION ; IRRIGATION ; IMPACT ; YIELD ; SUITABILITY
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391593
推荐引用方式 GB/T 7714	Liu, Qi,Niu, Jun,Wood, Jeffrey D.,et al. Spatial optimization of cropping pattern in the upper-middle reaches of the Heihe River basin, Northwest China[J],2022,264.
APA	Liu, Qi,Niu, Jun,Wood, Jeffrey D.,&Kang, Shaozhong.(2022).Spatial optimization of cropping pattern in the upper-middle reaches of the Heihe River basin, Northwest China.AGRICULTURAL WATER MANAGEMENT,264.
MLA	Liu, Qi,et al."Spatial optimization of cropping pattern in the upper-middle reaches of the Heihe River basin, Northwest China".AGRICULTURAL WATER MANAGEMENT 264(2022).