Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2018, Vol. 15, No. 2, pp. 159-168
The use of Landsat satellite images for the geoecological monitoring of urbanized areas
N.V. Krutskikh
1 , I.Yu. Kravchenko
2 1 Institute of Geology of Karelian Research Centre RAS, Petrozavodsk, Russia
2 Northern Water Problems Institute of Karelian Research Centre RAS, Petrozavodsk, Russia
Accepted: 20.11.2017
DOI: 10.21046/2070-7401-2018-15-2-159-168
A method for using remote probing data for the geoecological monitoring of urbanized areas is described. As snow cover in urban areas is considerably contaminated, its reflecting ability is changed. Assessment of snow cover transformation in a city is based on the data obtained by Landsat software. Indices based on variations in the reflecting ability of clean and dirty snow in various ranges are used as assessment criteria. It was found that the indices used and the concentration of technophilic elements in the snow correlate closely. Spectral indices show differences in the mineral and chemical compositions of contaminating impurities. Therefore, the contribution of various sources to snow cover contamination in a city can be estimated. The City of Petrozavodsk was used as an example for developing major algorithms for snow quality monitoring based on remote probing data for urban areas. Snow cover is formed at open-air dumping sites, from which snow is not removed in winter season. Two groups of criteria are used to check snow cover thickness at monitoring sites with the help of satellite images. The snow melting period is the optimum time for monitoring snow cover contamination.
Keywords: Landsat, remote sensing of the Earth, snow cover, snow indexes, NDSI, monitoring, urbanized areas
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