干旱区生态环境知识资源中心(Arid): A universal grain-size distribution of soil with scaling invariance

Arid

DOI	10.1111/ejss.13354
	A universal grain-size distribution of soil with scaling invariance
	Zhang, Jun; Li, Yong; Yang, Taiqiang; Liu, Jingjing; Guo, Xiaojun; Yao, Yingjie
通讯作者	Li, Y
来源期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
ISSN	1351-0754
EISSN	1365-2389
出版年	2023
卷号	74 期号:2
英文摘要	Soils are composed of wide-ranged grains and grain size distribution (GSD) is the fundamental characteristic determining the physical and hydraulic properties. Previously we have proposed a GSD function for various soils. However, the remarkable discrepancy in the distribution occurs in some soils, which not only limits the applicability of the function but also raises doubt as to the possibility of a universal GSD function. In this study we modify the GSD function to a general form of P(D) similar to D-.mu exp(-D/D-c)(n), which introduces a new exponent n for the grain size scale. It turns out that this modification has eliminated the discrepancies and universally applies to a great variety of soils from around the world (hence to be a universal GSD function, UGSD). The exponent n is proved to be a scaling factor of grain size in log-scale and divides soils into three categories of n < 1 n > 1, and n = 1. Furthermore, soils of surface processes (e.g., erosion, tillage, desertification, landslides, avalanches, deposition, and sediment transportation) remain in the same category and preserve the UGSD function. Thus, the UGSD not only provides parameters mu and D-c as synthetic indices for soil properties (e.g., as indices for spatial heterogeneity or variables for pedotransfer functions), but also describes texture changes in dynamic processes. The UGSD function represents a 'conservative law' underlying soil genesis and processes, which fills the knowledge gaps related to the lack of universally applicable indices for soil properties, and thus has universal applications in soil classification, spatial variability, as well as dynamical processes.
英文关键词	dynamical processes grain size distribution (GSD) scaling function soil texture spatial variability
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000953195700001
WOS关键词	HYDRAULIC CONDUCTIVITY ; FRACTAL MODEL ; MULTIFRACTAL CHARACTERIZATION ; WATER PROPERTIES ; USRI RIVER ; FRAGMENTATION ; EQUATION ; RETENTION ; PATTERNS ; POROSITY
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396335
推荐引用方式 GB/T 7714	Zhang, Jun,Li, Yong,Yang, Taiqiang,et al. A universal grain-size distribution of soil with scaling invariance[J],2023,74(2).
APA	Zhang, Jun,Li, Yong,Yang, Taiqiang,Liu, Jingjing,Guo, Xiaojun,&Yao, Yingjie.(2023).A universal grain-size distribution of soil with scaling invariance.EUROPEAN JOURNAL OF SOIL SCIENCE,74(2).
MLA	Zhang, Jun,et al."A universal grain-size distribution of soil with scaling invariance".EUROPEAN JOURNAL OF SOIL SCIENCE 74.2(2023).