Izvestiya of Saratov University.

Earth Sciences

ISSN 1819-7663 (Print)
ISSN 2542-1921 (Online)


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Iakimovich D. N., Vasyukov S. V., Sirotkin V. V., Vasiliev O. A. Identification of spectral indicators of soil erosion based on field spectrometry data (A case study of the Chuvash Republic). Izvestiya of Saratov University. Earth Sciences, 2026, vol. 26, iss. 2, pp. 94-101. DOI: 10.18500/1819-7663-2026-26-2-94-101, EDN: FJGEWS

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
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Russian
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631.459:528.88
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FJGEWS

Identification of spectral indicators of soil erosion based on field spectrometry data (A case study of the Chuvash Republic)

Autors: 
Iakimovich Dmitrii Nikolaevich, Chuvash State Agrarian University
Vasyukov Sergey V., Federal Service for State Registration, Cadastre and Cartography for the Chuvash Republic
Sirotkin Vyacheslav V., Kazan Federal University
Vasiliev Oleg A., Chuvash State Agrarian University
Abstract: 

The aim of the study is to identify relationships between the agrochemical indicators of the arable layer (humus content, mobile phosphorus, exchangeable potassium, and pH values of exchangeable acidity), field moisture, and spectral characteristics of soils in order to assess the degree of erosion under the conditions of the Chuvash Republic. The studies were carried out at five test sites (14 sampling points) on sod-podzolic soils, gray forest soils, leached chernozems, and their eroded varieties. Agrochemical parameters were determined according to GOST 26213-91, mobile phosphorus and potassium according to GOST R 54650-2011, and the pH of exchangeable acidity according to GOST 26483-85; spectrograms were recorded with a portable FieldSpec Hand Held 2 spectroradiometer on an open, ploughed surface. Correlation and regression analyses were used to assess the reliability of the results. It was shown that humus content and pH(KCl) values decrease with increasing degree of soil erosion. Two stable maxima are distinguished in the spectrograms; their ratio R1/R2 is statistically significantly related to humus and exchangeable acidity pH(KCl) and can be considered a rapid indicator of erosional transformations when interpreted jointly with the brightness of R2 and the position in the relief. The obtained relationships need to be verified on an extended sample.

Acknowledgments: 
The authors sincerely thank the personnel of the Testing Laboratory Center at Chuvash State Agrarian University for their support in carrying out the laboratory analyses.
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Received: 
11.03.2026
Accepted: 
12.03.2026
Published: 
01.06.2026