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Proceedings Paper

Environmental and landscape changes of Qinghai Lake, N. E. Tibet, during the past 30 years as revealed by satellite remote sensing data
Author(s): Y. Dong; B. Fu; Y. Ninomiya
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Paper Abstract

Satellite remote sensing imaging systems have provided a spatially and temporally continuous and effective method to map the environmental and landscape changes over large areas on the earth's surface. In this study, multitemporal and multisource satellite remote sensing images, including Landsat Multispectral Scanner (MSS), Thematic Mapper (TM), Enhanced Thematic Mapper Plus (ETM+) and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), were used to study the environmental and landscape changes happened in Qinghai Lake area from 1973 to 2000. Change detection methods, such as image enhancement and false color composition, were used to highlight the environmental and landscape changes, i.e. lake area shrinkage, desert expansion and cropland area variation. Results showed that: lake area had shrunken by 275 km2 from 1973 to 2000; in contrast, the area of desert and cropland increased by 287 km2 and 310 km2 during the same period, respectively. As a result, remarkable landscape changes have happened: several sub-lakes have separated from the main lake in the east; the famous Bird Island in the west became a peninsula connecting with the land. Analysis suggests that environmental and landscape changes of Qinghai Lake area are mainly caused by natural factors and human activities.

Paper Details

Date Published: 4 November 2010
PDF: 10 pages
Proc. SPIE 7841, Sixth International Symposium on Digital Earth: Data Processing and Applications, 784110 (4 November 2010); doi: 10.1117/12.881071
Show Author Affiliations
Y. Dong, China Earthquake Administration (China)
B. Fu, Institute of Geology and Geophysics (China)
Y. Ninomiya, National Institute of Advanced Industrial Science and Technology (Japan)

Published in SPIE Proceedings Vol. 7841:
Sixth International Symposium on Digital Earth: Data Processing and Applications
Huadong Guo; Changlin Wang, Editor(s)

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