干旱区生态环境知识资源中心(Arid): Detecting changes in irrigation water requirement in Central Asia under CO2 fertilization and land use changes

Arid

DOI	10.1016/j.jhydrol.2019.124315
	Detecting changes in irrigation water requirement in Central Asia under CO2 fertilization and land use changes
	Tian, Jing; Zhang, Yongqiang
通讯作者	Zhang, Yongqiang
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	583
英文摘要	As one of the largest arid and semiarid areas in the world, Central Asia (CA) has been facing severe water crisis. Agricultural irrigation consumes most water resources there. However, it is not clear how the irrigation water requirement (IWR) varies spatially and temporally in CA, especially under CO2 fertilization and land use change. This study, for the first time, quantifies changes of IWR for two predominant crops (cotton and winter wheat) over CA under two climate change scenarios (RCP2.6 and RCP4.5, both of which consider CO2 fertilization effects) and land use projections. Our results show that without considering atmospheric CO2 concentration for estimating IWR would result in large errors and even different signs of the changes. In the future, IWR for cotton and winter wheat tends to increase in 2020s and 2040s but decrease in 2060s and 2080s under RCP2.6 and CO2 fertilization. The change magnitude is less than 5%. Under RCP4.5 and CO2 fertilization, most areas in CA exhibit an increase of less than 5%. The maximum increases of 5%-15% for cotton occur in Tajikistan. The maximum increase of more than 50% for winter wheat occurs in Tajikistan under both climate scenarios. The IWR in Turkmenistan is most sensitive to land use change, with 33% increase compared with IWR in 2015. The other four countries have small differences (less than 10%) between 2015 and 2030. Severe water security pressure is predicted in Turkmenistan and Uzbekistan and the smallest in Tajikistan. This study provides a comprehensive evaluation of IWR for the Central Asian countries in the future and helps the decision maker for sensible water management.
英文关键词	Irrigation water requirement Future climate scenarios CO2 fertilization Central Asia Land use cover
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000527388300014
WOS关键词	CLIMATE-CHANGE IMPACTS ; RIVER-BASIN ; PRECIPITATION ; VARIABILITY ; VEGETATION ; MODELS ; WHEAT
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314995
作者单位	Chinese Acad Sci, IGSNRR, Key Lab Water Cycle & Related Land Surface Proc, A11 Datun Rd, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Tian, Jing,Zhang, Yongqiang. Detecting changes in irrigation water requirement in Central Asia under CO2 fertilization and land use changes[J],2020,583.
APA	Tian, Jing,&Zhang, Yongqiang.(2020).Detecting changes in irrigation water requirement in Central Asia under CO2 fertilization and land use changes.JOURNAL OF HYDROLOGY,583.
MLA	Tian, Jing,et al."Detecting changes in irrigation water requirement in Central Asia under CO2 fertilization and land use changes".JOURNAL OF HYDROLOGY 583(2020).