气候变化领域集成服务门户(CCPortal): Technical note: Saturated hydraulic conductivity and textural heterogeneity of soils

CCPortal

DOI	10.5194/hess-22-3923-2018
	Technical note: Saturated hydraulic conductivity and textural heterogeneity of soils
	García-Gutiérrez C.; Pachepsky Y.; Ángel Martín M.
发表日期	2018
ISSN	1027-5606
起始页码	3923
结束页码	3932
卷号	22 期号:7
英文摘要	Saturated hydraulic conductivity (Ksat) is an important soil parameter that highly depends on soil's particle size distribution (PSD). The nature of this dependency is explored in this work in two ways, (1) by using the information entropy as a heterogeneity parameter of the PSD and (2) using descriptions of PSD in forms of textural triplets, different than the usual description in terms of the triplet of sand, silt, and clay contents. The power of this parameter, as a descriptor of ln Ksat, was tested on a database larger than 19 000 soils. Bootstrap analysis yielded coefficients of determination of up to 0.977 for ln Ksat using a triplet that combines very coarse, coarse, medium, and fine sand as coarse particles; very fine sand, and silt as intermediate particles; and clay as fine particles. The power of the correlation was analysed for different textural classes and different triplets using a bootstrap approach. Also, it is noteworthy that soils with finer textures had worse correlations, as their hydraulic properties are not solely dependent on soil PSD. This heterogeneity parameter can lead to new descriptions of soil PSD, other than the usual clay, silt, and sand, that can describe better different soil physical properties, that are texture-dependent. © 2018 Author(s).
语种	英语
scopus关键词	Particle size; Particle size analysis; Sand; Silt; Bootstrap approach; Coarse particles; Hydraulic properties; Information entropy; Saturated hydraulic conductivity; Technical notes; Textural heterogeneities; Very fine sands; Hydraulic conductivity; bootstrapping; correlation; heterogeneity; hydraulic conductivity; parameterization; particle size; sand; saturation; silt; size distribution; soil water
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159966
作者单位	García-Gutiérrez, C., Department of Applied Mathematics, Universidad Politécnica de Madrid, Madrid, Spain; Pachepsky, Y., USDA-ARS Environmental Microbial and Food Safety Laboratory, Beltsville, MD 20705, United States; Ángel Martín, M., Department of Applied Mathematics, Universidad Politécnica de Madrid, Madrid, Spain
推荐引用方式 GB/T 7714	García-Gutiérrez C.,Pachepsky Y.,Ángel Martín M.. Technical note: Saturated hydraulic conductivity and textural heterogeneity of soils[J],2018,22(7).
APA	García-Gutiérrez C.,Pachepsky Y.,&Ángel Martín M..(2018).Technical note: Saturated hydraulic conductivity and textural heterogeneity of soils.Hydrology and Earth System Sciences,22(7).
MLA	García-Gutiérrez C.,et al."Technical note: Saturated hydraulic conductivity and textural heterogeneity of soils".Hydrology and Earth System Sciences 22.7(2018).