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Spatial relationship between clay content and geophysical data

Published online by Cambridge University Press:  09 July 2018

D. de Benedetto ,
A. Castrignanò ,
D. Sollitto  and
F. Modugno
D. de Benedetto*
Affiliation:
CRA-SCA, Research Unit for Cropping Systems in Dry Environments, Bari, 70125, Italy
A. Castrignanò
Affiliation:
CRA-SCA, Research Unit for Cropping Systems in Dry Environments, Bari, 70125, Italy
D. Sollitto
Affiliation:
CRA-SCA, Research Unit for Cropping Systems in Dry Environments, Bari, 70125, Italy
F. Modugno
Affiliation:
CRA-SCA, Research Unit for Cropping Systems in Dry Environments, Bari, 70125, Italy
*
*E-mail: [email protected]
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Abstract

An important attribute for soil use is clay content, because it affects the water-holding capacity and hydraulic properties of a soil. Soil surveys are time-consuming, labour-intensive and costly, while geophysical methods, such as Electromagnetic Induction (EMI) and Ground Penetrating Radar (GPR), offer a non-invasive and non-destructive approach to mapping soil features. The objective of this paper is to assess the spatial relationship between clay content and geophysical data. The EMI and GPR data and soil cores were collected and analysed in a field of about 3 ha size in Rutigliano, Bari, in SE Italy. The EMI data and clay contents were interpolated using ordinary cokriging. The GPR data were pre-processed and the envelope of the filtered GPR data was used to produce 3Dmaps of the kriged estimates. The correlation with clay content was large and positive for EMI, whereas it was negative for the GPR measurement. In this work, a combination of geostatistical and statistical analysis has shown a significant correlation between the EMI and GPR observations. Estimation of the mathematical function relating these two groups of variables requires a multivariate approach of non-stationary geostatistics.

Keywords

electromagnetic inductionground penetrating radarclay contentgeostatistics
Type
Research Article
Information
Clay Minerals , Volume 45 , Issue 2 , June 2010 , pp. 197 - 207
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2010

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