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Proceedings Paper

Correlation analysis between the biomass of oasis ecosystem and the vegetation index at Fukang
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Paper Abstract

The information of biomass and productivity of an ecosystem is an essential to evaluate the ecosystem and its environment. This sort of data is usually retrieved from satellite data. However, the accuracy of the retrieval and the algorithms for the retrieval vary with the environment and the type of the ecosystem. In this study, the relationship between the biomass of oasis ecosystems at Fukang, Xinjiang, China and the normalized vegetation index (NDVI) was established in order to derive biomass data of the ecosystem from satellite data. The NDVI data were from the MODIS data with a resolution of 250 meters. Biomass measurements were taken in August, 2003 at 53 sampling sites. Linear and nonlinear regression analyses were performed on this data set. In general, the nonlinear models perform better than the linear models although all of them can successfully generate biomass data with the input of NDVI. Among those nonlinear models, the model Y=5593.3NDVI3+7509.7NDVI2-1268.9NDVI+191 performs the best in terms of the retrieval accuracy, where Y represents the biomass.

Paper Details

Date Published: 27 September 2006
PDF: 7 pages
Proc. SPIE 6298, Remote Sensing and Modeling of Ecosystems for Sustainability III, 62982M (27 September 2006); doi: 10.1117/12.678178
Show Author Affiliations
Weiguo Liu, Xinjiang Univ. (China)
International Ctr. for Desert Affairs (China)
Wei Gao, Xinjiang Univ. (China)
International Ctr. for Desert Affairs (China)
Colorado State Univ. (United States)
Zhiqiang Gao, Institute of Geographical Sciences and Natural Resources Research (China)
Xinli Wang, Colorado State Univ. (United States)

Published in SPIE Proceedings Vol. 6298:
Remote Sensing and Modeling of Ecosystems for Sustainability III
Wei Gao; Susan L. Ustin, Editor(s)

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