干旱区生态环境知识资源中心(Arid): Using pedo-transfer functions to estimate dry soil layers along an 860-km long transect on China's Loess Plateau

Arid

DOI	10.1016/j.geoderma.2020.114320
	Using pedo-transfer functions to estimate dry soil layers along an 860-km long transect on China's Loess Plateau
	Zhao, Chunlei 1,2; Jia, Xiaoxu 1,2; Shao, Ming'; an 1,2; Zhang, Xubo 1
通讯作者	Jia, Xiaoxu
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2020
卷号	369
英文摘要	Dry soil layer (DSL) development as a result of imbalance in water input and output is a widespread pedohydrological phenomenon in arid/semi-arid regions such as the China's Loess Plateau (CLP). To build sufficient data for large-scale DSL estimation, soil water data for the 0-5 m soil profile were collected for the period 2013-2016 along an 860-km long transect on CLP and analyzed for pedo-transfer functions (PTFs). The objective was to determine the effects of environmental factors on DSL variation and to develop an effective PTF for the estimation of DSLs on CLP. Three DSL evaluation indices were calculated - DSL thickness (DSL-T), DSL formation depth (DSL-F) and DSL mean soil desiccation index (DSL-SDI). The results showed that DSLs were mainly distributed in the northcentral part of the transect, with a mean thickness of 2.77 m. We compared the performances of PTFs developed by different approaches - multiple regression (MR), artificial neural network (ANN) and the indirect and direct methods. It showed that the ANN approach effectively predicted DSL formation and indices. The indirect method improved simulation accuracy of DSL indices. The combination of the ANN approach and the indirect method gave the best estimation accuracy for DSL indices. The application of the PTFs not only reduced labor and time needed for field survey of DSL, but also improved DSL research on CLP and beyond. The indirect method based on soil moisture and/or hydrological models was promising for the estimation of DSL indices.
英文关键词	Dry soil layer Pedo-transfer function Soil desiccation Water management
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000524458800018
WOS关键词	SATURATED HYDRAULIC CONDUCTIVITY ; WATER CARRYING-CAPACITY ; MOISTURE ; EVAPOTRANSPIRATION ; VARIABILITY ; VEGETATION ; DROUGHT
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
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319334
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China; 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Chunlei,Jia, Xiaoxu,Shao, Ming',et al. Using pedo-transfer functions to estimate dry soil layers along an 860-km long transect on China's Loess Plateau[J]. 中国科学院地理科学与资源研究所,2020,369.
APA	Zhao, Chunlei,Jia, Xiaoxu,Shao, Ming',an,&Zhang, Xubo.(2020).Using pedo-transfer functions to estimate dry soil layers along an 860-km long transect on China's Loess Plateau.GEODERMA,369.
MLA	Zhao, Chunlei,et al."Using pedo-transfer functions to estimate dry soil layers along an 860-km long transect on China's Loess Plateau".GEODERMA 369(2020).