Using magnetic resonance imaging for experimental analysis of fine-sediment infiltration into gravel beds

Haynes, H., Vignaga, E. and Holmes, W.M. (2009) Using magnetic resonance imaging for experimental analysis of fine-sediment infiltration into gravel beds. Sedimentology, 56(7), pp. 1961-1975. (doi:10.1111/j.1365-3091.2009.01064.x)

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Abstract

Sedimentologists recognize that development of a fine-resolution, truly three-dimensional analytical tool is essential if the internal structure of an opaque material is to be examined. This paper therefore seeks to: (i) test the viability of magnetic resonance imaging for sedimentological research; and (ii) investigate fine-sediment infiltration into gravel beds. The results of six experiments are analysed quantitatively using ImageJ post-processing software. Data indicate that magnetic resonance imaging-based measurements of particle axes and volumes are comparable with standard laboratory techniques. Furthermore, the technique permits visualization and analysis of differences in the pattern of fine-sediment infiltration (median particle diameter, d) into a framework of gravel (median particle diameter, D). Data clearly illustrate a siltation process for samples of D/d = 34 and a sealing process for samples of D/d = 7 where the seal is restricted to a depth equal to 2D. This pore-scale visualization is valuable to the understanding of hydraulic–sediment–habitat interactions.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Holmes, Dr William and Haynes, Dr Heather and Vignaga, Miss Elisa
Authors: Haynes, H., Vignaga, E., and Holmes, W.M.
Subjects:G Geography. Anthropology. Recreation > GE Environmental Sciences
College/School:College of Medical Veterinary and Life Sciences > Institute of Neuroscience and Psychology
College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Sedimentology
ISSN:0037-0746
ISSN (Online):1365-3091
Published Online:21 April 2009

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
442651The influence of stress history in the stability of graded sediment bedsHeather HaynesEngineering & Physical Sciences Research Council (EPSRC)EP/E030467/1Infrastructure and Environment