干旱区生态环境知识资源中心(Arid): Cropland fallow reduces agricultural water consumption by 303 million tons annually in Gansu Province, China

Arid

DOI	10.1016/j.scitotenv.2023.163013
	Cropland fallow reduces agricultural water consumption by 303 million tons annually in Gansu Province, China
	Song, Wen; Song, Wei
通讯作者	Song, W
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2023
卷号	879
英文摘要	The high-intensity utilization of global cropland causes water shortage and food crisis, which seriously affects the re-alization of SDG 2 (zero hunger), SDG 6 (clean water and sanitation) and SDG 15 (life on land), and threatens the sus-tainable social, economic and ecological development. Cropland fallow can not only improve the quality of cropland and maintain ecosystem balance, but also have a significant water-saving effect. However, in most developing coun-tries, such as China, cropland fallow has not yet been widely promoted, and there are few reliable fallow cropland fallow identification methods, making it even more challenging to assess the water-saving effect. To remedy this def-icit, we propose a framework for mapping cropland fallow and evaluating its water savings. First, we used the Landsat series of data to interpret the annual land use/cover changes in Gansu Province, China from 1991 to 2020. Subse-quently, the spatial-temporal variation of cropland fallow in Gansu province (giving up farming for one to two years) was mapped. Finally, we evaluated the water-saving effect of cropland fallow using evapotranspiration, precip-itation, irrigation maps, and crop-related data, instead of actual water consumption. The results showed that the map-ping accuracy of fallow land in Gansu Province was 79.50 %, which was higher than that of most known fallow mapping studies. From 1993 to 2018, the average annual fallow rate in Gansu Province, China, was 10.86 %, which was ata low level in arid/semi-arid regions worldwide. More importantly, from 2003 to 2018, cropland fallow reduces annual water consumption of 303.26 million tons in Gansu Province, accounting for 3.44 % of agricultural water use in Gansu Province and equivalent to the annual water demand of 655,000 people in Gansu Province. Based on our re-search, we speculate that the increasing pilot projects of cropland fallow in China can bring significant water-saving effects and help achieve China's Sustainable Development Goals.
英文关键词	Cropland fallow Fallow mapping Water-saving effect Land use China
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000971865400001
WOS关键词	LAND FALLOW ; DATASET ; EVAPOTRANSPIRATION ; PERFORMANCE ; PROVISION ; ASSIST ; FOREST ; AREAS ; INDEX ; NDVI
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398525
推荐引用方式 GB/T 7714	Song, Wen,Song, Wei. Cropland fallow reduces agricultural water consumption by 303 million tons annually in Gansu Province, China[J],2023,879.
APA	Song, Wen,&Song, Wei.(2023).Cropland fallow reduces agricultural water consumption by 303 million tons annually in Gansu Province, China.SCIENCE OF THE TOTAL ENVIRONMENT,879.
MLA	Song, Wen,et al."Cropland fallow reduces agricultural water consumption by 303 million tons annually in Gansu Province, China".SCIENCE OF THE TOTAL ENVIRONMENT 879(2023).