Characterizing spatial-temporal patterns and abrupt changes in deep soil moisture across an intensively managed watershed

doi:10.1016/j.geoderma.2019.01.044

IEECAS OpenIR > 生态环境研究室

	Characterizing spatial-temporal patterns and abrupt changes in deep soil moisture across an intensively managed watershed
	Wang, YQ (Wang, Yunqiang)1,2,3; Sun, H (Sun, Hui)1; Zhao, YL (Zhao, Yali)1,4
通讯作者	Wang, Yunqiang(wangyq@ieecas.cn)
	2019-05-01
发表期刊	GEODERMA
ISSN	0016-7061
卷号	341 页码:181-194
产权排序	1
摘要	Soil moisture content (SMC) is highly variable in space and time due to the combined effects of natural processes and human influences. This study was conducted to explore the temporal-spatial patterns of deep SMC and detect possible abrupt changes in SMC in deep soil layers across an intensively managed watershed. We monitored SMC to a depth of 500 cm from 2016 to 2017 at the Gutun watershed (N = 89) on the Chinese Loess Plateau and determined related soil and vegetation properties. The mean SMC on the slopes at different depths were lower than in the gullies at the intensively managed areas affected by the "Grain for Green" project and the "Gully Land Consolidation" project. With increasing soil depth, slope SMCs gradually increased to 14%, while gully SMCs reached 40%. The spatial structures and patterns of mean SMCs within the 0-500 cm profile were similar but differed among different sub-layers. The detected fast changing layers (FCLs) of SMC (mean thickness = 76 cm) often occurred on the slopes of the watershed, while the relatively stable layers of SMC (mean thickness = 257 cm) were often located in the gullies. In deep soil layers (below 300 cm), we detected deep-FCLs at eight sites (mean thickness = 60 cm) which were all located on the slopes and under the same species (Robinia pseudoacacia L.). The mean SMCs within each of the eight deep-FCLs demonstrated a decreasing trend with time, which may be caused by the distribution of fresh roots. Human management had a profound impact on the spatial and temporal patterns of SMC in deep soil profiles at the watershed scale. This information should be considered by hydrologists and policy makers when developing eco-hydrology models and best management practices at multiple scales in a watershed.
关键词	Deep soils Land use change Meteorological variable Soil water management Land restoration The Loess Plateau
DOI	10.1016/j.geoderma.2019.01.044
关键词[WOS]	LOESS PLATEAU ; LAND-USE ; HYDRAULIC CONDUCTIVITY ; VERTICAL-DISTRIBUTION ; VARIABILITY ; CARBON ; VEGETATION ; TRANSPIRATION ; CATCHMENT ; DYNAMICS
收录类别	SCI ; SCIE
语种	英语
资助项目	National Natural Science Foundation of China[41571130083] ; National Natural Science Foundation of China[41530854] ; National Natural Science Foundation of China[41471189] ; National Natural Science Foundation of China[41722106] ; Ten Thousand Talent Program for Young topnotch talent
WOS研究方向	Agriculture
项目资助者	National Natural Science Foundation of China ; Ten Thousand Talent Program for Young topnotch talent
WOS类目	Soil Science
WOS记录号	WOS:000459520100018
出版者	ELSEVIER SCIENCE BV
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/10959
专题	生态环境研究室
通讯作者	Wang, YQ (Wang, Yunqiang)
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China; 2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China; 3.Beijing Normal Univ, Interdisciplinary Res Ctr Earth Sci Frontier, Beijing 100875, Peoples R China; 4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, YQ ,Sun, H ,Zhao, YL . Characterizing spatial-temporal patterns and abrupt changes in deep soil moisture across an intensively managed watershed[J]. GEODERMA,2019,341:181-194.
APA	Wang, YQ ,Sun, H ,&Zhao, YL .(2019).Characterizing spatial-temporal patterns and abrupt changes in deep soil moisture across an intensively managed watershed.GEODERMA,341,181-194.
MLA	Wang, YQ ,et al."Characterizing spatial-temporal patterns and abrupt changes in deep soil moisture across an intensively managed watershed".GEODERMA 341(2019):181-194.

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