干旱区生态环境知识资源中心(Arid): Efficient water-saving irrigation based on regional irrigation schedule optimisation

Arid

DOI	10.5004/dwt.2020.25275
	Efficient water-saving irrigation based on regional irrigation schedule optimisation
	Han, Congying 1,2; Zhang, Baozhong 1,2; Liu, Yu 1,2
通讯作者	Zhang, Baozhong
来源期刊	DESALINATION AND WATER TREATMENT
ISSN	1944-3994
EISSN	1944-3986
出版年	2020
卷号	187 页码:30-41
英文摘要	Shortage of agricultural water resources and low agricultural water use efficiency (WUE, which is the economic output per unit of water, and is divided into WUEEI, the ratio of yield to evapotranspiration and WUEET, the ratio of yield to irrigation volume) have become important factors that restrict agricultural development in northwest China. In the middle oasis of the Heihe River Basin (HRB), the major causes for loss of agricultural water and low irrigation efficiency are large irrigation quotas, the uneven spatial distribution of agricultural water resources and unreasonable irrigation schedules. A full understanding of the spatial distribution of agricultural water consumption and water productivity in the middle oasis of HRB is a prerequisite for improving agricultural WUE and ensuring food production security under the premise of existing agricultural water supply. In this study, by using the AquaCrop-RS model, the spatial distribution of water consumption and water productivity in the middle oasis of HRB was analyzed under the current irrigation schedules. Simulations were conducted to study the deficit irrigation scenarios in this region, preliminarily arriving at appropriate irrigation quotas for different irrigation districts. A multi-objective optimization model and the genetic algorithm NSGA-II with an elitist strategy were used in optimizing the irrigation schedule for each irrigation unit. Irrigation schedules that meet the highest yield and the highest WUE ET for the middle oasis were obtained. Results show that the irrigation quota of corn in the middle oasis after irrigation schedule optimization is reduced by 0-657 mm under different irrigation schedules, WUEET is increased by 4.13%-5.13% and WUEI rises by 69%-91%, thereby preliminarily achieving the water-saving and high-yield goals for corn in the middle oasis.
英文关键词	Genetic algorithm Multi-objective optimization Irrigation schedule optimization AquaCrop-RS
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000545026200005
WOS关键词	HEIHE RIVER-BASIN ; WHEAT ; MODEL
WOS类目	Engineering, Chemical ; Water Resources
WOS研究方向	Engineering ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319477
作者单位	1.China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China; 2.Natl Ctr Efficient Irrigat Engn & Technol Res Bei, Beijing 100048, Peoples R China
推荐引用方式 GB/T 7714	Han, Congying,Zhang, Baozhong,Liu, Yu. Efficient water-saving irrigation based on regional irrigation schedule optimisation[J],2020,187:30-41.
APA	Han, Congying,Zhang, Baozhong,&Liu, Yu.(2020).Efficient water-saving irrigation based on regional irrigation schedule optimisation.DESALINATION AND WATER TREATMENT,187,30-41.
MLA	Han, Congying,et al."Efficient water-saving irrigation based on regional irrigation schedule optimisation".DESALINATION AND WATER TREATMENT 187(2020):30-41.