Research on the remote sensing methods of drought monitoring in Chongqing

Shiqi Yang; Yunhui Tang; Yanghua Gao; Yongjin Xu

doi:10.1117/12.901641

23 November 2011 Research on the remote sensing methods of drought monitoring in Chongqing

Shiqi Yang, Yunhui Tang, Yanghua Gao, Yongjin Xu

Proceedings Volume 8006, MIPPR 2011: Remote Sensing Image Processing, Geographic Information Systems, and Other Applications; 800620 (2011) https://doi.org/10.1117/12.901641
Event: Seventh International Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR2011), 2011, Guilin, China

Abstract

There are regional and periodic droughts in Chongqing, which impacted seriously on agricultural production and people's lives. This study attempted to monitor the drought in Chongqing with complex terrain using MODIS data. First, we analyzed and compared three remote sensing methods for drought monitoring (time series of vegetation index, temperature vegetation dryness index (TVDI), and vegetation supply water index (VSWI)) for the severe drought in 2006. Then we developed a remote sensing based drought monitoring model for Chongqing by combining soil moisture data and meteorological data. The results showed that the three remote sensing based drought monitoring models performed well in detecting the occurrence of drought in Chongqing on a certain extent. However, Time Series of Vegetation Index has stronger sensitivity in time pattern but weaker in spatial pattern; although TVDI and VSWI can reflect inverse the whole process of severe drought in 2006 summer from drought occurred - increased - relieved - increased again - complete remission in spatial domain, but TVDI requires the situation of extreme drought and extreme moist both exist in study area which it is more difficult in Chongqing; VSWI is simple and practicable, which the correlation coefficient between VSWI and soil moisture data reaches significant levels. In summary, VSWI is the best model for summer drought monitoring in Chongqing.

Citation Download Citation

Shiqi Yang, Yunhui Tang, Yanghua Gao, and Yongjin Xu "Research on the remote sensing methods of drought monitoring in Chongqing", Proc. SPIE 8006, MIPPR 2011: Remote Sensing Image Processing, Geographic Information Systems, and Other Applications, 800620 (23 November 2011); https://doi.org/10.1117/12.901641

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KEYWORDS

Vegetation

Soil science

Remote sensing

MODIS

Data modeling

Environmental sensing

Spatial resolution

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