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Space-Time Modeling of the Electrical Conductivity of Soil in a Geothermal Zone

The aim of this study was to generate models to predict the salinity of the soils in the geothermal zone which is located in Michoacán, México, over space and time. Systematic sampling was performed at locations 400 m apart with a sampling period every 48 days. At each site, two soil samples, from d...

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Published in:	Communications in Soil Science and Plant Analysis 2018-05, Vol.49 (9), p.1107-1118
Main Authors:	Anaya-Flores, Raquel, Cruz-Cárdenas, Gustavo, Silva, José Teodoro, Ochoa-Estrada, Salvador, Álvarez-Bernal, Dioselina
Format:	Article
Language:	English
Subjects:	Electrical conductivity Electrical resistivity Kriging interpolation Mathematical models Modelling Regression analysis Sampling Soil Soil conductivity Soil salinity Statistical methods
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creator	Anaya-Flores, Raquel Cruz-Cárdenas, Gustavo Silva, José Teodoro Ochoa-Estrada, Salvador Álvarez-Bernal, Dioselina
description	The aim of this study was to generate models to predict the salinity of the soils in the geothermal zone which is located in Michoacán, México, over space and time. Systematic sampling was performed at locations 400 m apart with a sampling period every 48 days. At each site, two soil samples, from depths of 0-30 cm and 30-60 cm, were collected and analysed in laboratory. Regression-Kriging was used to make spatial predictions of the electrical conductivity of soil (ECs). Spherical and Gaussian theoretical models fit the experimental semivariograms. The results showed that the soil samples ranged from slightly saline (2.1-4 dS m-1) to strongly saline (8.1-16 dS m-1). In addition, the ECs was greater at a depth of 30-60 cm than it was at a depth of 0-30 cm. The ECs decreased from more than 8.0 dS m-1 to less than 4.0 dS m-1 after the first sampling period.
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subjects	Electrical conductivity Electrical resistivity Kriging interpolation Mathematical models Modelling Regression analysis Sampling Soil Soil conductivity Soil salinity Statistical methods
title	Space-Time Modeling of the Electrical Conductivity of Soil in a Geothermal Zone
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