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Data integration model to assess soil organic carbon availability
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AI
DOI：10.1016/j.geoderma.2010.09.026.png)
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Abstract
En 中文
Soil data acquisition and assessment are crucial phases in the evaluation of soil degradation scenarios. To overcome the lack of field data, flexible sampling approaches can be used to complement conventional soil sampling. For the assessment of soil quality, it is necessary to integrate different soil support data and to provide a coherent spatial characterization of soil properties. This study proposes a new model to combine soil data from two different supports: point data, which refers to the concentration measured in the topsoil layer, and bulk data, which refers to the concentration measured for the whole soil depth sampled. The method developed uses a geostatistical co-simulation algorithm based on the experimental bi-distribution between both types of soil supports to compute co-simulated values. This new approach was applied to assess Soil Organic Carbon (SOC) availability in the topsoil. The results were used to identify critical areas in the Left Margin of the Guadiana River; an area in the South of Portugal with a high susceptibility to desertification. (C) 2010 Elsevier B.V. All rights reserved.
Keywords:
Geostatistics
Joint sequential simulation
Bivariate distribution
Soil organic carbon assessment