Using geostatistics to elucidate temporal change in the spatial variation of aeolian sediment transport

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Title Using geostatistics to elucidate temporal change in the spatial variation of aeolian sediment transport
Author Chappell, Adrian; McTainsh, Grant Harvey; Strong, Craig
Journal Name Earth Surface Processes and Landforms
Year Published 2003
Place of publication United Kingdom
Publisher John Wiley and Sons Ltd.
Abstract Little is known about the spatial and temporal scales of variation in aeolian processes. Studies that aim to investigate surface erodibility often sample aeolian sediment transport at the nodes of a regular grid of arbitrary size. Few aeolian transport investigations have the resources to obtain sufficient samples to produce reliable models for mapping the spatial variation of transport. This study reports the use of an innovative nested strategy for sampling multiple spatial scales simultaneously using 40 sediment samplers. Reliable models of the spatial variation in aeolian sediment transport were produced and used for ordinary punctual kriging and stochastic simulated annealing to produce maps for several wind erosion events over a 25 km2 playa in western Queensland, Australia. The results support the existence of a highly dynamic wind erosion system that was responding to possibly cyclic variation in the availability of material and fluctuations in wind energy. The spatial scale of transport was considerably larger than the small scale expected of the factors controlling surface erodibility. Thus, it appears that transport cannot be used as a surrogate of erodibility at the scale of this investigation. Simulation maps of transport provided considerably more information than those from kriging about the variability in aeolian sediment transport and its possible controlling factors. The proposed optimal sampling strategy involves a nested approach using ca 50 samplers.
Peer Reviewed Yes
Published Yes
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Copyright Statement Copyright 2003 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 28
Edition 2003
Page from 567
Page to 585
ISSN 0197-9337
Date Accessioned 2004-03-26
Language en_AU
Faculty Faculty of Environmental Sciences
Subject PRE2009-Geomorphology
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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