干旱区生态环境知识资源中心(Arid): Regional spatial variability of root-zone soil moisture in arid regions and the driving factors

Arid

DOI	10.1139/cjss-2019-0006
	Regional spatial variability of root-zone soil moisture in arid regions and the driving factors - a case study of Xinjiang, China
	Li, Xiangdong 1,2; Shao, Ming’an 2,3,4; Zhao, Chunlei 3,4; Liu, Tong 1; Jia, Xiaoxu 3,4; Ma, Changkun 3,4
通讯作者	Zhao, Chunlei
来源期刊	CANADIAN JOURNAL OF SOIL SCIENCE
ISSN	0008-4271
EISSN	1918-1841
出版年	2019
卷号	99 期号:3 页码:277-291
英文摘要	Soil moisture is a key element of the hydrological cycle, and it significantly impacts the surface water and energy fluxes. However, a knowledge gap exists on the spatial variability of root-zone soil moisture at the regional scale in arid and hyperarid regions. Thus, soil moisture measurements at 142 sites were taken in Xinjiang (northwest China), and the relationships between soil moisture and 19 environmental factors were analyzed. The results showed that both absolute gravitational soil water content (SWC) and relative extractable water (REW) increased with increasing soil depth in the 0-100 cm soil profile. It generally decreased in the order of cropland > forestland > grassland > shrubland > bare land. Semivariograms suggested that SWC had moderate spatial dependence over a large range of 473-558 km, and REW was more randomly distributed at the regional scale in Xinjiang. Redundancy analysis suggested that environmental factors could explain 47.5%-50.9% of the variability of soil moisture, which was more strongly driven by land surface factors (p < 0.01) than by climatic factors (p > 0.05). Soil properties and other local variables explained, respectively, 40.7% and 32.3% of the variability of soil moisture in the 0-100 cm soil profile. Soil properties independently accounted for 12.8% and 28.1% of the variability in soil moisture in the 0-50 and 50-100 cm soil layers, respectively. Soil texture, field capacity, wilting point, organic carbon, bulk density, land use, and normalized difference vegetation index were the dominant factors influencing soil moisture variations.
英文关键词	root-zone soil moisture regional scale spatial variability geostatistical analysis redundancy analysis
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000484119400005
WOS关键词	ENTIRE LOESS PLATEAU ; LOWER TARIM RIVER ; SPATIOTEMPORAL VARIABILITY ; WATER CONTENT ; PREDICTION ; TRANSPORT ; PATTERNS ; DROUGHT ; CLIMATE ; STORAGE
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	中国科学院地理科学与资源研究所 ; 西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214772
作者单位	1.Guangdong Inst Ecoenvironm Sci & Technol, Guangdong Key Lab Integrated Agroenvironm Pollut, Guangzhou 510650, Guangdong, Peoples R China; 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China; 4.Univ Chinese Acad Sci, Coll Nat Resources & Environm, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiangdong,Shao, Ming’an,Zhao, Chunlei,et al. Regional spatial variability of root-zone soil moisture in arid regions and the driving factors - a case study of Xinjiang, China[J]. 中国科学院地理科学与资源研究所, 西北农林科技大学,2019,99(3):277-291.
APA	Li, Xiangdong,Shao, Ming’an,Zhao, Chunlei,Liu, Tong,Jia, Xiaoxu,&Ma, Changkun.(2019).Regional spatial variability of root-zone soil moisture in arid regions and the driving factors - a case study of Xinjiang, China.CANADIAN JOURNAL OF SOIL SCIENCE,99(3),277-291.
MLA	Li, Xiangdong,et al."Regional spatial variability of root-zone soil moisture in arid regions and the driving factors - a case study of Xinjiang, China".CANADIAN JOURNAL OF SOIL SCIENCE 99.3(2019):277-291.