Spatiotemporal variability of soil-water characteristic curve model parameters of Lanzhou collapsible loess

doi:10.2166/ws.2021.316

	Spatiotemporal variability of soil-water characteristic curve model parameters of Lanzhou collapsible loess
	Zhao, Wenju 1; Liu, Yuhang 1; Hu, Jiazhen 1; Li, Zongli 2
刊名	WATER SUPPLY
	2021-09
卷号	22 期号:2 页码:1770-1780
关键词	collapsible loess prediction soil-water characteristic curve spatial variability temporal stability
ISSN号	1606-9749
DOI	10.2166/ws.2021.316
英文摘要	The spatiotemporal variation of the model parameters of the soil-water characteristic curve (SWCC) reflect the soil water holding capacity and soil pore distribution state. It is an integral part of interdisciplinary disciplines such as soil hydrodynamics and ecohydrology. The authors selected the optimal SWCC model for the Lanzhou collapsible loess, used classical statistics and geostatistics methods studied the spatiotemporal variability of the SWCC model parameters, and used the comprehensive comparison of the mean relative differences (MRD), standard deviations (SDRD) and an index of temporal stability (ITS) determined the representativeness measuring point. The results showed that the SWCC parameters alpha was medium variability in the 0-30 cm soil layer, n and theta(s) were of low variability, the spatial distribution of the parameters of different soil layers was consistent. Migration direction prediction of theta(s) was very similar in each layer, alpha, n and theta(s) were all strongly significantly correlated positively. Moreover, the determination coefficient of representative measuring point 16 had the highest prediction accuracy for the measured values of SWCC. The results of this paper can be used as a simple method to predict SWCC and provide theoretical guidance for soil water management and soil collapse erosion monitoring in collapsible loess area.
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
语种	英语
出版者	IWA PUBLISHING
WOS记录号	WOS:000697739800001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148920]
专题	能源与动力工程学院
作者单位	1.Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Peoples R China; 2.Minist Water Resources, Gen Inst Water Resources & Hydropower Planning &, Beijing 100120, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Wenju,Liu, Yuhang,Hu, Jiazhen,et al. Spatiotemporal variability of soil-water characteristic curve model parameters of Lanzhou collapsible loess[J]. WATER SUPPLY,2021,22(2):1770-1780.
APA	Zhao, Wenju,Liu, Yuhang,Hu, Jiazhen,&Li, Zongli.(2021).Spatiotemporal variability of soil-water characteristic curve model parameters of Lanzhou collapsible loess.WATER SUPPLY,22(2),1770-1780.
MLA	Zhao, Wenju,et al."Spatiotemporal variability of soil-water characteristic curve model parameters of Lanzhou collapsible loess".WATER SUPPLY 22.2(2021):1770-1780.