Multifractal parameters of soil particle size as key indicators of the soil moisture distribution

doi:10.1016/j.jhydrol.2021.125988

	Multifractal parameters of soil particle size as key indicators of the soil moisture distribution
	Ke, Zengming 2; Ma, Lihui 1,2; Jiao, Feng 1,2; Liu, Xiaoli 3; Liu, Zheng 3; Wang, Zhanli 1,2
刊名	JOURNAL OF HYDROLOGY
	2021-04-01
卷号	595 页码:8
关键词	Multifractal parameter Particle size distribution Soil moisture content
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2021.125988
通讯作者	Jiao, Feng(Jiaof@nwafu.edu.cn)
英文摘要	Determining the soil moisture content (SMC) distribution is indispensable for field management, especially in arid and semiarid regions. Effective parameters can contribute to the optimization of SMC models for accurate SMC prediction. Therefore, in this study, the relationships between the SMC and multifractal parameters (D-2, D-v, D-s, A(v), and F-v denote the correlation dimension, property of small probability and large probability, spectrum width, and symmetry of spectrum shape, respectively) of the soil particle size distribution (PSD) were explored in the hilly loess region of China. A grid method was adopted (20 m x 20 m, total = 384 points) to sample the SMC in the 0-40 cm and 40-80 cm soil layers on the second, eighth, and twelfth days after the first rainfall, which were defined as the early sampling (ES), medium sampling (MS), and late sampling (LS), respectively. We found that the variation in the SMC explained by the multifractal parameters increased as SMC decreased, where they accounted for 40.07% and 75.75% of the SMC in the 0-40 cm and 40-80 cm soil layers in LS, respectively. The variation in the SMC in the 0-40 cm explained by the multifractal parameters was lower than that in the 40-80 cm soil layer in all sampling stages. The equations fitted for the whole soil layer were significant in all sampling stages (P < 0.01). A(v) (31.95%) and D-v (13.59%) had negative correlations with SMC, and their relative importance values with respect to SMC were high in all sampling stages (P < 0.05). SMC at higher values had a positive correlation with F-v, whereas SMC at lower values had a significant positive correlation with D-2 and negative correlation with D-s, and these two parameters in the MS and LS stages explained more than 75% of the variation in the SMC in the 40-80 cm soil layer. These results suggest that the characteristics of the soil PSD can be described in detail by the multifractal parameters, which can directly reflect the SMC. Thus, we conclude that SMC is closely related to the multifractal parameters of the PSD (A(v), D-v, D-s, D-2, and F-v) and it can be applied to optimize SMC models.
资助项目	National Key Research and Development Program of China[2017YFD0800502] ; National Natural Science Foundation of China[41671510]
WOS关键词	WATER-USE EFFICIENCY ; LAND-USE ; SPATIAL VARIABILITY ; ROOT BIOMASS ; MAIZE ; TEXTURE ; IRRIGATION ; TRANSECT ; GROWTH ; YIELD
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000641592600040
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/162944]
专题	中国科学院地理科学与资源研究所
通讯作者	Jiao, Feng
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Ke, Zengming,Ma, Lihui,Jiao, Feng,et al. Multifractal parameters of soil particle size as key indicators of the soil moisture distribution[J]. JOURNAL OF HYDROLOGY,2021,595:8.
APA	Ke, Zengming,Ma, Lihui,Jiao, Feng,Liu, Xiaoli,Liu, Zheng,&Wang, Zhanli.(2021).Multifractal parameters of soil particle size as key indicators of the soil moisture distribution.JOURNAL OF HYDROLOGY,595,8.
MLA	Ke, Zengming,et al."Multifractal parameters of soil particle size as key indicators of the soil moisture distribution".JOURNAL OF HYDROLOGY 595(2021):8.