干旱区生态环境知识资源中心(Arid): Untangling the effects of future climate change and human activity on evapotranspiration in the Heihe agricultural region, Northwest China

Arid

DOI	10.1016/j.jhydrol.2019.124323
	Untangling the effects of future climate change and human activity on evapotranspiration in the Heihe agricultural region, Northwest China
	Zou, Minzhong; Kang, Shaozhong; Niu, Jun; Lu, Hongna
通讯作者	Kang, Shaozhong
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	585
英文摘要	Evapotranspiration (ET) is the component of the hydrological cycle that accounts for most water consumption across the agricultural region of the Heihe River basin in Northwest China. It is of great practical importance in the basin to allocate water resources for ensuring the security of food production, and to formulate effective science-based agro-ecological management policies to address climate change impacts due to the probable effects of future changing environment on regional ET. In this study, the Soil and Water Assessment Tool (SWAT) model were first driven by the downscaled climate data from three IPCC representative concentration pathways (RCPs) that have been projected by five General circulation models (GCMs) in the Coupled model inter-comparison project phase 5 (CMIP5) and the water-saving irrigation scenario to project ET per unit area, we then added to the model the upper and lower limits of the appropriate agricultural scale that considered the ecological health to simulate the behaviour of total ET for the period 2021-2050. Finally 12 case study scenarios were used to separate the effects of climate change and human activity on total ET. The results showed that total ET can be significantly decreased by > 1.22 x 10(8) m(3) when the RCP-water-saving irrigation scenarios were combined with the appropriate agricultural scale. The results suggest that the best set of strategies to reduce agricultural water consumption is to reduce the area of arable land through consideration of ecosystem health and aggressively utilize water-saving agricultural technology to counter the increased ET brought about by future climate change in the Heihe agricultural region.
英文关键词	Evapotranspiration SWAT model RCP scenarios Appropriate agricultural scale Water-saving irrigation Heihe agricultural region
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000544230000004
WOS关键词	CROP WATER PRODUCTIVITY ; CONTINENTAL RIVER-BASIN ; LAND-USE CHANGE ; ARID REGION ; MIDDLE REACHES ; DEFICIT IRRIGATION ; DRIP IRRIGATION ; SUITABLE OASIS ; PART 1 ; PRECIPITATION
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319657
作者单位	China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Zou, Minzhong,Kang, Shaozhong,Niu, Jun,et al. Untangling the effects of future climate change and human activity on evapotranspiration in the Heihe agricultural region, Northwest China[J]. 中国农业大学,2020,585.
APA	Zou, Minzhong,Kang, Shaozhong,Niu, Jun,&Lu, Hongna.(2020).Untangling the effects of future climate change and human activity on evapotranspiration in the Heihe agricultural region, Northwest China.JOURNAL OF HYDROLOGY,585.
MLA	Zou, Minzhong,et al."Untangling the effects of future climate change and human activity on evapotranspiration in the Heihe agricultural region, Northwest China".JOURNAL OF HYDROLOGY 585(2020).