METHODICAL ISSUES OF SATELLITE IMAGES ANALYSIS AND OF ECOGEOMORPHOLOGICAL MAPPING OF MOUNTAIN AREAS IN SUBTROPICS AND TROPICS

A. S. Asoyan

doi:10.15356/0435-4281-2017-3-38-47

METHODICAL ISSUES OF SATELLITE IMAGES ANALYSIS AND OF ECOGEOMORPHOLOGICAL MAPPING OF MOUNTAIN AREAS IN SUBTROPICS AND TROPICS

A. S. Asoyan

https://doi.org/10.15356/0435-4281-2017-3-38-47

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Abstract

The issues concerning relief indicative features and exogenous processes evidences on satellite images in subtropics and tropics mountain areas are presented insufficiently in geomorphological publications. The paper presents ecogeomorphological maps of alpine regions of Middle Chile (ChileanArgentinean Andes) and Eastern Cuba (Sierra Maestra Range) compiled at scales of 1:1000000 and 1:200000. The maps show manifestations of hazardous geomorphic processes. It was found that most effective for large-scale ecogeomorphological mapping are summer panchromatic and multispectral satellite images with resolution from 8–15 to 30 m/pixel. Indicative features of exogenous processes are topographic steps and altitudinal landscape zones with characteristic topographic patterns, vegetation cover (mainly leaf canopy and grass coverage), rock lithology. These indicators were used to distinguish areas of glacio-collapse, nivation, slope-wash and gully erosion, fluvial processes and forms. The established indicators facilitate the interpretation of satellite images. Comparative analysis of geomorphic process indication on satellite images in alpine regions of tropics, sub-tropics and temperate regions (Big Caucasus, Kuril Islands) revealed similarities in spite of the differences in natural settings.

Keywords

satellite images, Chilean and Argentinean Andes, Sierra Maestra Range, lanscape indicative features, ecogeomorphological maps

About the Author

A. S. Asoyan

Institute of Geography RAS, Moscow
Russian Federation
Moscow

References

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Review

For citations:

Asoyan A.S. METHODICAL ISSUES OF SATELLITE IMAGES ANALYSIS AND OF ECOGEOMORPHOLOGICAL MAPPING OF MOUNTAIN AREAS IN SUBTROPICS AND TROPICS. Geomorfologiya. 2017;(3):38-47. (In Russ.) https://doi.org/10.15356/0435-4281-2017-3-38-47