New Zealand Journal of Agricultural Research abstracts
Multifractal analysis of soil structure under long-term wastewater
irrigation based on digital image technology
Guan Xiaoyan
Yang Peiling*
Ren Shumei
Li Yunkai
College of Water Conservancy & Civil Engineering
China Agricultural University
PO Box 57
17 Tsinghua East Road 100038
Beijing, PR of China
*Author for correspondence: yang-pl@163.com
Abstract Soil structure exerts important
influences on
edaphic conditions and the environment. It constitutes a fundamental
soil property correlated to many other soil properties. In this study,
generalised dimensions of soil structure are computed from data
obtained by 2D image analysis of soil samples irrigated with wastewater
for 30 and 50 years. The samples analysed show suitable scaling
properties. The generalised dimensions Dq appear defined with R2
greater
than 0.89 in the range of moment order (q) between –10 and +10.
The variation of Dq with respect to q and the shape of the
multifractal generalised spectrum reveal that soil structure has
properties close to multifractal self-similar measures. These results
show that multifractal analysis is an appropriate tool for
characterising soil structure and thus may be used as an indicator of
soil structure as well as for deriving important soil physical
properties.
Keywords digital image; generalised
dimension;
multifractal; soil structure; wastewater irrigation
A07093; Online publication date 25 January 2008; Received and
accepted 10 August 2007
New Zealand Journal of Agricultural Research, 2007, Vol. 50:
789–796
0028–8233/07/5005–0789 © The Royal Society of New Zealand 2007
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