COMPARATIVE ESTIMATION OF POSSIBILITIES OF DELINEATION OF GEOHAZARDS USING AIRBORNE AND SATELLITE IMAGES (PIPELINE CASE STUDY)

Orlov T.V.^1,*,  Zverev A.V.¹,  Bondar V.V.¹

¹ Sergeev Institute of Environmental Geoscience RAS, Moscow
*E-mail: tim.orlov@gmail.com

For effective monitoring of geohazards for the pipelines, remote sensing data are the most common observation and analysis methods. Space and aerial photography are widely used to control hazardous processes occurring under natural conditions. Comparative assessment of the possibilities of identifying exogenous geological processes using airborne and satellite imagery of different resolutions is a crucial step in analyzing the quality and completeness of information obtained from images. Evaluation of information, first of all, includes a direct comparison of parameters, such as the number of foci, the length, and the area of identified exogenous processes; next the geohazard shares are compared by the number of manifestations and linear dimensions. The principal hazards were analyzed, such as flooding-waterlogging, flooding-backwater effect, thermal erosion, erosion, thermokarst, zones of hummocky peatland development. The comparative analysis of images showed a significant difference in the completeness of information interpretation. Deciphering space images makes it possible to determine up to 85% of geohazard manifestations, and the conditions for their development are almost completely identified. When interpreting aerial images, the parameters of length and area are most accurately determined. Much more centers of the geohazard manifestation are revealed, as compared to those provided from deciphering space images. Using space images and aerial photography of different resolutions in combination appears to be the best suitable way to monitor the linear structures.  

Key words:  satellite images, airborne images, deciphering, monitoring

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