Abstract
The problem of estimating soil moisture by remote (satellite) methods remains topical. To do this, regression models based on the correlation between radar data and ground-based measurements of soil moisture are constructed. Ground-based measurements were taken at two stations in Germany (Falkenberg and Gevenich), which are a part of the International Soil Moisture Network (ISMN). Sentinel-1 satellite data are used as radar data. Multiple regressions with a determination coefficient up to 0.91 are constructed. It is proposed to use in regressions not only radar, but also meteorological data, which makes it possible to increase the coefficient of determination and reduce the standard error of regression. For the possible spread of regressions obtained for one territory to another, two criteria are proposed: proximity of the values of the Selyaninov hydrothermal coefficient (HTC) and similarity of the soil texture. According to these conditions, two stations in Ryazan oblast and in Kalmykia were chosen. Their archival information on soil moisture is contained in the ISMN database up to 1998. Each of the selected stations satisfies only one of the chosen criteria.
REFERENCES
Beale, J., Snapir, B., Waine, T., Evans, J., and Corstanje, R., The significance of soil properties to the estimation of soil moisture from C-band synthetic aperture radar, Preprint CC BY 4.0 License, Discussion started June 28, 2019. https://doi.org/10.5194/hess-2019-294
Blumberg, D.G., Freilikher, V., Lyalko, I.V., Vulfson, L.D., Kotlyar, A.L., Shevchenko, V.N., and Ryabokonenko, A.D., Soil moisture (water-content) assessment by an airborne scatterometer, Remote Sens. Environ., 2000, vol. 71, pp. 309–319.
Chen, K., Wu, T.-D., Tsang, L., Li, Q., Shi, J., and Fung, A., Emission of rough surfaces calculated by the integral equation method with comparison to three-dimensional moment method simulations, IEEE Trans. Geosci. Remote Sens., 2003, pp. 90–101.
Dubois, P., van Zyl, J., and Engman, T., Measuring soil moisture with imaging radars, IEEE Trans. Geosci. Remote Sens., 1995, vol. 33, pp. 915–926. http://ieeexplore.ieee.org/document/406677/. https://doi.org/10.1109/36.406677
Jackson, T.J. and Schmugge, T.J., Passive microwave remote-sensing system for soil moisture. Some supporting research, IEEE Trans. Geosci. Remote Sens., 1989, vol. 27, pp. 225–235.
Oh, Y., Sarabandi, K., and Ulaby, F., An empirical model and an inversion technique for radar scattering from bare soil surfaces, IEEE Trans. Geosci. Remote Sens., 1992, pp. 370–381. https://doi.org/10.1109/36.134086
Rodionova, N.V., Correlation of the Sentinel-1 radar data with ground-based measurements of the soil moisture and temperature, Izv., Atmos. Ocean. Phys., 2019, vol. 55, no. 9, pp. 939–948. https://doi.org/10.1134/S0001433819090421
Selyaninov, G.T., O sel’skokhozyaistvennoi otsenke klimata, Trudy po sel’skokhozyaistvennoi meteorologii (On Agricultural Climate Assessment, Works on Agricultural Meteorology), 1928, vol. 20, pp. 165–177.
Selyaninov, G.T., Principles of agroclimatic zoning of the USSR, in Voprosy agroklimaticheskogo raionirovaniya SSSR (Problems in the Agroclimatic Zoning of the USSR), Moscow: MSKh SSSR, 1958, pp. 7–14.
Shumova, N.A., Quantitative climate indicators in the assessment of hydrothermal conditions in the Republic of Kalmykia, Arid. Ekosist., 2021, vol. 27, no. 4, pp. 13–24. https://doi.org/10.24412/1993-3916-2021-4-13-24
Srivastava, H.S., Patel, P., and Navalgund, R.R., How far SAR has fulfilled its expectation for soil moisture retrieval, SPIE Digital Libr., 2006, vol. 6410, no. 64100, pp. 1–12.
Wu, T.-D., Chen, K., Shi, J., and Fung, A., A transition model for the reflection coefficient in surface scattering, IEEE Trans. Geosci. Remote Sens., 2001, vol. 39, pp. 2040–2050.
Funding
This work was carried out within the framework of the state contract for the Kotelnikov Institute of Radio Engineering and Electronics for the topic “Cosmos.”
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
The author of this work declares that she has no conflicts of interest.
Additional information
Translated by A. Nikol’skii
Publisher’s Note.
Pleiades Publishing remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Rodionova, N.V. Estimating Soil Moisture by Radar Data Based on Multiple Regression. Izv. Atmos. Ocean. Phys. 59, 1281–1289 (2023). https://doi.org/10.1134/S0001433823120186
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0001433823120186