干旱区生态环境知识资源中心(Arid): Fractal and multifractal analysis of soil particle-size distribution and correlation with soil hydrological properties in active layer of Qinghai-Tibet Plateau, China

Arid

DOI	10.1016/j.catena.2021.105373
	Fractal and multifractal analysis of soil particle-size distribution and correlation with soil hydrological properties in active layer of Qinghai-Tibet Plateau, China
	Gao, Zeyong; Niu, Fujun; Lin, Zhanju; Luo, Jing
通讯作者	Niu, FJ (corresponding author), Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, 320 Donggang West Rd, Lanzhou 730000, Gansu, Peoples R China.
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2021
卷号	203
英文摘要	The soil hydrological properties (HPs) in active layers regulate soil water migration and affect the evolution of permafrost and biogeochemical cycles. There is relatively little understanding of the changes in soil HPs as a result of soil particle-size distribution (PSD) in the permafrost regions of the Qinghai-Tibet Plateau. In this study, different land-cover types, namely alpine wet meadow (AWM), extremely degraded wet meadow (EDWM), alpine meadow (AM), degraded alpine meadow (DAM), alpine steppe (AS), and alpine desert (AD), were used to determine the relationships between soil PSD and HPs. Soil HPs were determined using borehole nuclear magnetic resonance, and soil PSD (0-2 mm) was analyzed using fractal and multifractal theory. The results showed that vegetation degradation caused coarse soil particle accumulation in the root zone, reflected by the soil single-fractal dimension (D-v: 2.12-2.50). The D-v, values showed significant positive correlations with soil clay and silt content as well as a negative correlation with sand content. Results from the generalized fractal and singularity spectra suggested an even distribution of soil particles in the root zone of the AWM, AM, and AD sites. Vegetation degradation increased the soil PSD capacity dimension (D-0), information dimension (D-1), correlation dimension, D-1/D-0 ratio, and Holder exponent of order zero. This was indicative of a narrow soil PSD range and non-uniform soil texture in the root zone. Although capillary water dominated the total soil water content in the alpine soils, soil water composition was also dependent on the vegetation type and soil stratigraphic distribution. Soil particle composition and multifractal dimensions were found to be effective parameters for forecasting soil HPs in the non-mot zone of alpine soils. However, the presence of vegetation weakens the relationship between soil PSD and HPs. This study contributes to the accurate evaluation of hydrological and biogeochemical cycles in permafrost regions.
英文关键词	Soil particle-size distribution Multifractal analysis Soil hydrological properties Alpine grasslands Qinghai-Tibet Plateau
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000654354000065
WOS关键词	YELLOW-RIVER DELTA ; LAND-USE TYPES ; HYDRAULIC CONDUCTIVITY ; ORGANIC-MATTER ; WATER-RETENTION ; PERMAFROST REGIONS ; ALPINE GRASSLAND ; LOESS PLATEAU ; VEGETATION ; PATTERNS
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349812
作者单位	[Gao, Zeyong; Niu, Fujun; Lin, Zhanju; Luo, Jing] Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, 320 Donggang West Rd, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Gao, Zeyong,Niu, Fujun,Lin, Zhanju,et al. Fractal and multifractal analysis of soil particle-size distribution and correlation with soil hydrological properties in active layer of Qinghai-Tibet Plateau, China[J],2021,203.
APA	Gao, Zeyong,Niu, Fujun,Lin, Zhanju,&Luo, Jing.(2021).Fractal and multifractal analysis of soil particle-size distribution and correlation with soil hydrological properties in active layer of Qinghai-Tibet Plateau, China.CATENA,203.
MLA	Gao, Zeyong,et al."Fractal and multifractal analysis of soil particle-size distribution and correlation with soil hydrological properties in active layer of Qinghai-Tibet Plateau, China".CATENA 203(2021).