The Use of NDVI in Digital Mapping of the Content of Available Lithium in the Arable Horizon of Soils in Southwestern Siberia
- Authors: Gopp N.V.1, Savenkov O.A.1, Nechaeva T.V.1, Smirnova N.V.1
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Affiliations:
- Institute of Soil Science and Agrochemistry, Siberian Branch, Russian Academy of Sciences
- Issue: Vol 54, No 9 (2018)
- Pages: 1152-1157
- Section: Use of Space Information about the Earth
- URL: https://journals.rcsi.science/0001-4338/article/view/148646
- DOI: https://doi.org/10.1134/S0001433818090165
- ID: 148646
Cite item
Abstract
We have determined the informational value of the Normalized Difference Vegetation Index (NDVI) for predictive mapping of the content of available lithium in the arable horizon of soils of different slope positions: the first (280–310 m) and the second (240–280 m) altitudinal levels. The NDVI is not informative for the diagnostics or mapping of the content of available lithium in soils of small drainage valleys, the width of which is smaller than the resolution of the satellite image (30 m). In the regression model, the NDVI explains 28% of the variation in the content of available lithium in soils. Based on this model, a predictive map of the content of available lithium in soils has been compiled. Data on the spatial distribution pattern of the NDVI calculated based on a Landsat 8 satellite image (resolution of 30 m) were used as an indicator and the cartographical basis for digital mapping. The accuracy of the prediction of the content of available lithium in soils is good (MAPE is 16.9%). It has been revealed that the NDVI values and the content of available lithium in soils of the first altitudinal level are higher than in the second. The differences between NDVI in the drainage valley and on the first altitudinal level are not insignificant.
Keywords
About the authors
N. V. Gopp
Institute of Soil Science and Agrochemistry, Siberian Branch, Russian Academy of Sciences
Author for correspondence.
Email: natalia.gopp@gmail.com
Russian Federation, Novosibirsk
O. A. Savenkov
Institute of Soil Science and Agrochemistry, Siberian Branch, Russian Academy of Sciences
Email: natalia.gopp@gmail.com
Russian Federation, Novosibirsk
T. V. Nechaeva
Institute of Soil Science and Agrochemistry, Siberian Branch, Russian Academy of Sciences
Email: natalia.gopp@gmail.com
Russian Federation, Novosibirsk
N. V. Smirnova
Institute of Soil Science and Agrochemistry, Siberian Branch, Russian Academy of Sciences
Email: natalia.gopp@gmail.com
Russian Federation, Novosibirsk