干旱区生态环境知识资源中心(Arid): Comparison of different approaches for estimating soil water characteristic curves from saturation to oven dryness

Arid

DOI	10.1016/j.jhydrol.2019.123971
	Comparison of different approaches for estimating soil water characteristic curves from saturation to oven dryness
	Shang, Li 1; Li, Danfeng 2
通讯作者	Li, Danfeng
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2019
卷号	577
英文摘要	Three approaches were compared for estimating continuous soil water characteristic curves (SWCCs) from easily accessible soil properties. The approaches included combining the Mohammadi and Vanclooster (2011) method (the MV method) with the van Genuchten (1980) model (MV-vG approach), the modified MV-vG approach, and combining the Jensen et al. (2015) method with the Fredlund and Xing (1994) model (the J-FX approach). A total of 195 disturbed soil samples and 195 undisturbed soil cores were collected from 1-m soil profiles in an arid region of northwestern China. Particle size distribution (PSD) and organic matter (OM) content were determined. The volumetric water content and matric potential data pairs of each sample during the drying process were measured using a high speed centrifuge. All of the measured soil properties were used to evaluate the applicability of the approaches for continuous SWCC estimation. The MV method has a robust physical basis and is independent of any experimental SWCC data pairs. Some intrinsic shortcomings affect the estimation of continuous SWCC by the MV-vG approach. The integration of a soil structure feature improved the estimation of the modified MV-vG approach. The estimation of the J-FX approach for SWCC is robust for the five textural classes, and outperformed the MV-vG approach and the modified MV-vG approach. The good performance of the J-FX approach can be attributed in part to the fact that it distinguishes the dominant forces governing water retention of dry and wet ranges, and relates the PSD, specific surface area, and OM content to the pore size distribution. All these factors are vital for soil water retention, but have been simplified or ignored by the MV method. Both the modified MV-vG approach and the J-FX approach are promising for estimating continuous SWCCs at a regional scale. The modified MV-vG approach may be suitable for rigid soils with medium textures at potentials above wilting point. The J-FX approach is applicable for the whole range of water retention from saturation to oven dryness for soils with substantially varying bulk density, soil texture and organic matter content at a regional scale. The results of this study are fundamental for use in simulating the transfer of water and solutes in layered-structured soil profiles and for estimating the vegetation carrying capacity of soil available water in arid regions.
英文关键词	Soil water retention Pore size distribution Particle size distribution Predictive models Pedotransfer function
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000488304300044
WOS关键词	PARTICLE-SIZE DISTRIBUTION ; RETENTION CURVE ; BULK-DENSITY ; LIQUID RETENTION ; POROUS-MEDIA ; CLAY CONTENT ; PORE ; HYSTERESIS ; PREDICT ; MODEL
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217180
作者单位	1.Beijing Union Univ, Dept Fdn Courses, Beijing 100101, Peoples R China; 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Shang, Li,Li, Danfeng. Comparison of different approaches for estimating soil water characteristic curves from saturation to oven dryness[J]. 中国科学院地理科学与资源研究所,2019,577.
APA	Shang, Li,&Li, Danfeng.(2019).Comparison of different approaches for estimating soil water characteristic curves from saturation to oven dryness.JOURNAL OF HYDROLOGY,577.
MLA	Shang, Li,et al."Comparison of different approaches for estimating soil water characteristic curves from saturation to oven dryness".JOURNAL OF HYDROLOGY 577(2019).