Testing a statistical curve-fitting procedure for quantifying sediment populations within multi-modal particle-size distributions

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Title Testing a statistical curve-fitting procedure for quantifying sediment populations within multi-modal particle-size distributions
Author Leys, John; McTainsh, Grant Harvey; Koen, Terry; Mooney, Brian; Strong, Craig
Journal Name Earth Surface Processes and Landforms
Year Published 2005
Place of publication UK
Publisher John Wiley & Sons Ltd.
Abstract This paper describes a series of tests designed to evaluate the capacity of a personal computer (PC) based statistical curve-fitting program called MIX to quantify composite populations within multi-modal particle-size distributions. Three natural soil samples were analysed by a Coulter Multisizer, and their particle-size distributions analysed using MIX software to identify the modes, standard deviations and proportions of their composite populations. The particle-size distributions of the three natural soil samples were then numerically combined in equal proportions using a spreadsheet program to create synthetic particle-size distributions of known populations. MIX was then tested on the synthetic particle-size distributions to see if the modes and proportions it identified were similar to those modes and proportions known to characterize the synthetic particle-size distributions. The main outcome is that MIX can very accurately describe the modal particle size and proportions of the major composite populations within a particle-size distribution. However MIX has difficulty in identifying small populations (those contributing <10 per cent of a total particle-size distribution), particularly when they are located in the central sections of particle-size distributions, overlain by larger populations, or when positioned in the fine tails of distributions. Despite these minor shortcomings, MIX is a valuable tool for the examination and interpretation of particle-size data.
Peer Reviewed Yes
Published Yes
Publisher URI http://www3.interscience.wiley.com/journal/117935722/grouphome/home.html
Alternative URI http://dx.doi.org/10.1002/esp.1159
Copyright Statement Copyright 2005 John Wiley & Sons, Ltd. Self-archiving of the author-manuscript version is not yet supported by this publisher. Please refer to the journal link for access to the definitive, published version or contact the author for more information.
Volume 30
Page from 579
Page to 590
ISSN 0197-9337
Date Accessioned 2006-03-24
Date Available 2009-10-01T05:55:59Z
Language en_AU
Research Centre Atmospheric Environment Research Centre
Faculty Faculty of Environmental Sciences
Subject PRE2009-Geomorphology; PRE2009-Physical Geography
URI http://hdl.handle.net/10072/4319
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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