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Geoinformatika 2015; 3(55) : 68-75 (in Ukrainian)

APPLICATION OF REMOTE SENSING DATA FOR OVERALL ASSESSMENT OF REGION SOILS

L.V. Gebrin1, O.I. Sakhatsky2

1National Aviation University, 1 Kosmonavta Komarova Ave., Kyiv 03058, Ukraine, e-mail: gebrin_liliya@mail.ru
2State Institution “Centre for Aerospace Research of the Earth of  the Institute of Geology, NAS of Ukraine”, 55b Gonchara Str., Kyiv 01601, Ukraine, e-mail: sakhatsky@casre.kiev.ua

Purpose. The developed generalized methods of assessment of soil based on ground and space information could be an effective toolkit providing information and supporting management decisions for soil monitoring. Application of such techniques would result in proper use of agronomic measures for improving soil fertility, providing specific information about the state of soil of the areas.
Design/methodology/approach. The experimental studies were conducted using software Erdas Imagine 2014 for radiometric calibration and atmospheric correction of the image, as well as for determining the spectral signatures and data of spectral channels to further define the correlation dependency and humus definition pixels in each image. With the assistance of the software ArcGis was created mapped schemes of investigated territory.
Findings.  This article reveals close correlation with a high determination coefficients between the spectral energy brightness of each pixel in the channels (red R = 0,732, R = 0,673 green and blue R = 0,702) of satellite images Landsat 8 OLI and the actual indicator of humus content (Hav. = 2,12) within the monitored areas of the administrative units of Transcarpathian region. The average vegetation indices of the studied area were determined (NDVI < 0, 12), as well as the value of humus in each pixel of image spectral characteristics in the red channel. Thus example, for MD 19 Solomonove, with the indicator of actual humus content of 1,86 (as of 2013), a predictive indicator of humus was found in the range of 0,67 to 1,34, which suggests a significant reduction in soil fertility on the area as of 2015.
Practical value/implications. The study confirmed that the soils of Ukraine and its separate regions (Transcarpathian), quickly degrade and lose their nutritional value, especially humus. This trend makes them unsuitable for further use for agriculture, indicating the decline of agro-industrial complex as a whole. Ground methods of monitoring the crops condition are certainly effective, but it is a time-consuming expensive process. The generalized method of soil assessment that based on aerospace research is an efficient and reliable mechanism of management decision making sustainable agriculture.

Keywords: soils, humus content, aerospace methods, spectral characteristics, correlation, linear dependence, remote sensing of the Earth.

The full text of papers 

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