干旱区生态环境知识资源中心(Arid): Soil salinity prediction based on scale-dependent relationships with environmental variables by discrete wavelet transform in the Tarim Basin

Arid

DOI	10.1016/j.catena.2020.104939
	Soil salinity prediction based on scale-dependent relationships with environmental variables by discrete wavelet transform in the Tarim Basin
	Wei, Yang; Ding, Jianli; Yang, Shengtian; Wang, Fei; Wang, Chen
通讯作者	Wang, F
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2021
卷号	196
英文摘要	The variation in soil salinity is affected by environmental factors that occur at different scales with varying intensities. It is critical to adequately consider environmental variables under scale effects for digital soil mapping which has been minimally discussed in previous studies. The objectives of this research are to analyze the scale-dependent variability in soil salinity distribution under environmental controlling factors using discrete wavelet transform (DWT) techniques and to compare the differences between the accuracy of soil salinity predictions with and without multiple scale-specific relationships. Thirteen environmental factors related to soil salinity that included influencing environmental factors and indicative environmental factors involving climate, soil, terrain, and vegetation were extracted at 500 m intervals along four transects through farmland and salt-affected land situated at the oasis and oasis-desert ecotones of Xinjiang, China. Each spatial series of soil salinity and environmental variables along the four transects was separated into seven scale components (six details components, namely Dl through D6, and one approximation component, namely A6). A Hilbert transform was used to identify the specific spatial scales of each scale component in the DWT procedure. The results indicate that 21.77 km and > 32 km were the dominant scales, which explained approximately 60-80% of the spatial variation of soil salinity throughout the oases. The prediction accuracy with wavelet reconstruction that depended on all the scale components of environmental variables is significantly improved compared with the accuracy of those with the stepwise multiple linear regression method at a single sampling scale. The generalized difference vegetation index (GDVI) was the major predictor of soil salinity on salt-affected land, while evapotranspiration and the terrain ruggedness index (TRI) were the major contributing factors in farmland inside the oases. This study demonstrated that specific scale-dependent relationships can reveal the scale control of soil salinity variation and had the potential to improve the prediction accuracy of soil properties.
英文关键词	Scale-dependent relationships Soil salinity Discrete wavelet transform Tarim basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000583955200087
WOS关键词	SPATIAL VARIABILITY ; THERMAL-CONDUCTIVITY ; ORGANIC-MATTER ; MODIS ; CHINA ; RIVER ; DECOMPOSITION ; RESOLUTION ; PROVINCE ; REACHES
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
来源机构	北京师范大学 ; 新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327963
作者单位	[Wei, Yang; Ding, Jianli; Yang, Shengtian; Wang, Fei] Xinjiang Univ, Xinjiang Common Univ Key Lab Smart City & Environ, Coll Resource & Environm Sci, Urumqi 830046, Peoples R China; [Yang, Shengtian] Beijing Normal Univ, Coll Water Sci, Beijing Key Lab Urban Hydrol Cycle & Sponge City, Beijing 100875, Peoples R China; [Wang, Chen] Anhui Geog Informat Intelligence Technol & Engn C, Hefei 230001, Peoples R China; [Wang, Chen] Anhui Univ, Anhui Prov Key Lab Wetland Ecosyst Protect & Rest, Hefei 230601, Peoples R China
推荐引用方式 GB/T 7714	Wei, Yang,Ding, Jianli,Yang, Shengtian,et al. Soil salinity prediction based on scale-dependent relationships with environmental variables by discrete wavelet transform in the Tarim Basin[J]. 北京师范大学, 新疆大学,2021,196.
APA	Wei, Yang,Ding, Jianli,Yang, Shengtian,Wang, Fei,&Wang, Chen.(2021).Soil salinity prediction based on scale-dependent relationships with environmental variables by discrete wavelet transform in the Tarim Basin.CATENA,196.
MLA	Wei, Yang,et al."Soil salinity prediction based on scale-dependent relationships with environmental variables by discrete wavelet transform in the Tarim Basin".CATENA 196(2021).