Quantitative assessment of desertification using landsat data on a regional scale - a case study in the ordos plateau, china.

Sensors
Duanyang XuJianjun Pan

Abstract

Desertification is a serious threat to the ecological environment and social economy in our world and there is a pressing need to develop a reasonable and reproducible method to assess it at different scales. In this paper, the Ordos Plateau in China was selected as the research region and a quantitative method for desertification assessment was developed by using Landsat MSS and TM/ETM+ data on a regional scale. In this method, NDVI, MSDI and land surface albedo were selected as assessment indicators of desertification to represent land surface conditions from vegetation biomass, landscape pattern and micrometeorology. Based on considering the effects of vegetation type and time of images acquired on assessment indictors, assessing rule sets were built and a decision tree approach was used to assess desertification of Ordos Plateau in 1980, 1990 and 2000. The average overall accuracy of three periods was higher than 90%. The results showed that although some local places of Ordos Plateau experienced an expanding trend of desertification, the trend of desertification of Ordos Plateau was an overall decrease in from 1980 to 2000. By analyzing the causes of desertification processes, it was found that climate change could benefit...Continue Reading

References

Sep 15, 2005·Environmental Monitoring and Assessment·Danfeng SunBaoguo Li
Sep 19, 1975·Science·R D JacksonJ Otterman

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Citations

Jan 8, 2014·Journal of Environmental Health Science & Engineering·Remus PravalieDaniel Peptenatu

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Software Mentioned

ERDSA
Ordos

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