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	Hydrological behaviour of microbiotic crusts on sand dunes: Example from NW China comparing infiltration in crusted and crust-removed soil
	Coppola, A.1,3; Basile, A.3; Wang, X.2; Comegna, V.1; Tedeschi, A.3; Mele, G.3; Comegna, A.1
刊名	SOIL & TILLAGE RESEARCH
	2011-12-01
卷号	117页码:34-43
关键词	Microbiotic crusts Hydraulic properties Sand dune erosion Tension infiltrometer method Numerical simulations
ISSN号	0167-1987
DOI	10.1016/j.still.2011.08.003
通讯作者	Coppola, A.(antonio.coppola@unibas.it)
英文摘要	Biological soil crusts are important microbiotic communities which are considered a key factor in combating desertification in terms of sand dune remobilitation. Because of their greater concentration of clay, silt and hydrophobic organic matter, they create a physical discontinuity in surface profile which potentially contribute to variability in soil hydrology of arid and semiarid land and should be considered in the development of hydrological and erosion models. However, until recently limited inconclusive research has been conducted to determine the functional relationship between soil and microbiotic crusts. We investigated the influence of microbiotic crust on hydrological behaviour of crusted sand dunes in NW China. The infiltration data on a crusted and crust-removed sand dune were obtained with dish permeameter which was not moved during the measurement at a sequence of nominal pressure head values, h, of -1, -4, -7, -10, -18 cm. Hydraulic conductivity K(h) was measured by steady-state infiltration experiments and piece-wise application of the exponential relation between K and h, according to Wooding's analytical solution of a three-dimensional flow field. The transient experimental infiltration data, along with initial and final water contents were used for numerical analysis within sand profiles without and with microbiotic crust. Specifically, we provided evidences that the main physical and hydrological consequences occurring locally, always cause lower unsaturated fluxes in the sand beneath the crusted layer. Nevertheless, due to the effective rainfalls regime, it has insignificant effects on the local soil water regimes with unchanged storage and deep fluxes. (C) 2011 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	UNSATURATED HYDRAULIC CONDUCTIVITY ; TENGGER DESERT ; MICROSTRUCTURE ; INFILTROMETERS ; MORPHOLOGY ; IMAGES ; WATER
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000298895100005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2556475
专题	寒区旱区环境与工程研究所
通讯作者	Coppola, A.
作者单位	1.Univ Basilicata, Dept Agr & Forestry Syst Management DITEC, I-85100 Potenza, Italy 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 3.Inst Mediterranean Agro Forestry Syst, CNR ISAFOM, I-80056 Ercolano Naples, Italy
推荐引用方式 GB/T 7714	Coppola, A.,Basile, A.,Wang, X.,et al. Hydrological behaviour of microbiotic crusts on sand dunes: Example from NW China comparing infiltration in crusted and crust-removed soil[J]. SOIL & TILLAGE RESEARCH,2011,117:34-43.
APA	Coppola, A..,Basile, A..,Wang, X..,Comegna, V..,Tedeschi, A..,...&Comegna, A..(2011).Hydrological behaviour of microbiotic crusts on sand dunes: Example from NW China comparing infiltration in crusted and crust-removed soil.SOIL & TILLAGE RESEARCH,117,34-43.
MLA	Coppola, A.,et al."Hydrological behaviour of microbiotic crusts on sand dunes: Example from NW China comparing infiltration in crusted and crust-removed soil".SOIL & TILLAGE RESEARCH 117(2011):34-43.

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