ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2016, Vol. 13, No. 5, pp. 214-223

Assessment of dry land ecosystem dynamics based on time series of satellite images

R. Kharazmi 1 , E.А. Panidi 1 , M.М. Karkon Varnosfaderani 2 
1 Saint Petersburg State University, Saint Petersburg, Russia
2 Moscow State University of Land Management, Moscow, Russia
Accepted: 15.08.2016
DOI: 10.21046/2070-7401-2016-13-5-214-223
Spatiotemporal analysis of landscape dynamics in arid regions is very important for understanding the major threats that occur in arid ecosystems. The study deals with application of Landsat 5 and Landsat 8 multispectral satellite images to land type dynamics monitoring for the area of Hamoon Wetlands located in the Sistan Basin. The supervised maximum likelihood classification technique was applied to detect land type changes on the studied area. Cross-tabulation matrixes were used to assess the area change for different land types. The data presented in the matrixes were obtained by pairwise comparison of the masks, which were produced for four time slices (in 1992–2015) by classifying the basic land types. It is detected that main change in this region is consisted in replacement of approximately 54% of the water bodies area with desert areas and pastures in the period from 1992 to 2015. This change is related mainly to the regime of feeding rivers, which are not bringing enough water. The obtained results emphasize the importance of continuous monitoring of the ecosystem evolution in arid regions, which allows early detection of the significant change and quick adjustments of the land use management schema.
Keywords: Hamoon Wetlands, Sistan Basin, Helmand River, cross-tabulation matrix, multispectral imagery
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