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Proceedings Paper

Changing landscapes: monitoring ecologically sensitive ecosystems in a dynamic semi-arid landscape using satellite imagery: a case study in Ejin Oasis, western China
Author(s): Meng-Lung Lin; Yu Cao; Yi-Huang Tao; Jyh-yi Shih; Guo-Jing Yan; Yung-Tan Lee; Du-Ning Xiao; Shin Wang; Hsien-Hao Chiu
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Paper Abstract

Land degradation has become an important issue in western China recently. Oasis ecosystem is sensitive to environmental disturbances, such as abnormal /extreme events of precipitations, water supply from upper watersheds, fluctuations of temperatures, etc. Satellite remote sensing of terrestrial ecosystems provides temporal dynamics and spatial distributions of landscape green covers over large areas. Seasonal green cover data are normally important in assessing landscape health (ex. desertification, rate of urban sprawl, natural disturbances) in arid and semi-arid regions. In this study, green cover data is derived from vegetation indices retrieved from MODIS sensors onboard Terra. The satellite images during the period April 2000 to December 2005 are analyzed to quantify the spatial distribution and temporal changes of Ejin Oasis. The results will help improving monitoring techniques to evaluate land degradation and to estimate the newest tendency of landscape green cover dynamics in the Ejin Oasis.

Paper Details

Date Published: 12 December 2006
PDF: 9 pages
Proc. SPIE 6411, Agriculture and Hydrology Applications of Remote Sensing, 641122 (12 December 2006); doi: 10.1117/12.693774
Show Author Affiliations
Meng-Lung Lin, Aletheia Univ. (Taiwan)
Yu Cao, Zhejiang Univ. (China)
Yi-Huang Tao, Tung Nan Univ. of Science and Technology (Taiwan)
Jyh-yi Shih, Aletheia Univ. (Taiwan)
Guo-Jing Yan, Cold and Arid Regions Environmental and Engineering Research Institute (China)
Yung-Tan Lee, Aletheia Univ. (Taiwan)
Du-Ning Xiao, Cold and Arid Regions Environmental and Engineering Research Institute (China)
Shin Wang, National Taiwan Univ. (Taiwan)
Hsien-Hao Chiu, National Taiwan Univ. (Taiwan)


Published in SPIE Proceedings Vol. 6411:
Agriculture and Hydrology Applications of Remote Sensing
Robert J. Kuligowski; Jai S. Parihar; Genya Saito, Editor(s)

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