ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2025, V. 22, No. 3, pp. 121-135

Determination of soil organic matter content in Minsk Region of Belarus using gradient boosting classifiers based on satellite data

A.N. Chervan 1 , B. Zhao 1 
1 Belarusian State University, Minsk, Belarus
Accepted: 17.03.2025
DOI: 10.21046/2070-7401-2025-22-3-121-135
One of key indicators of soil degradation processes in agricultural lands is the loss of soil organic matter (SOM). Therefore, methodologies for monitoring the spatial and temporal distribution of SOM are critically important from both ecological and economic perspectives. Currently, remote sensing data, particularly Sentinel-2 satellite imagery, can be used to estimate SOM content in the surface humus-accumulative horizon of arable soils. Using Sentinel-2 data and field soil mapping data from Belarus, the study aimed to analyze the spatial accuracy of SOM content estimation and the results of automated satellite image interpretation, with a focus on Minsk Region of Belarus. A range of analytical methods was employed, including selection of representative spectral bands as model inputs using Spearman’s correlation analysis and gradient boosting classifiers for GIS-based modeling. The proposed approach was evaluated in terms of achieving high-precision and rapid inversion, as well as spatial analysis of SOM content across genetic soil types. The inversion model accuracy was validated using an independent database. Results of the spatial analysis demonstrated that the model, based on Sentinel-2 imagery in bands B6, B7, B8, B8A and B12, most effectively utilized second-order derivatives. The inversion model achieved the highest accuracy (minimum 93.8 %, average 96.2 %), with an RMSE of 0.31 and a Kappa coefficient of 0.985. The lowest SOM content in arable soils was observed in the Berezino District, whereas the highest SOM levels were found in the Lyuban and Soligorsk districts that are characterized by a significant proportion of hydromeliorated agricultural lands.
Keywords: remote sensing, Sentinel-2, soil organic matter content, remote sensing data, gradient boosting classifier
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