| Research on drought remote sensing monitoring model of karstand non-karst geological environment areas in Guangxi |
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| DOI：10.7606/j.issn.1000-7601.2007.02.33 |
| Key Words: drought monitoring satellite remote sensing MODIS normalized different vegetation index(NDVI) land surface temperature(LST) |
| Author Name | Affiliation | | KUANG Zhao-min | Remote Sensing Application and Validation Base of NSMC, Nanning,Guangxi 530022,China；Guangxi Meteorological Disaster Mitigation Institute,Nanning,Guangxi 530022,China | | ZHONG Shi-quan | Remote Sensing Application and Validation Base of NSMC, Nanning,Guangxi 530022,China；Guangxi Meteorological Disaster Mitigation Institute,Nanning,Guangxi 530022,China | | HUANG Yong-lin | Remote Sensing Application and Validation Base of NSMC, Nanning,Guangxi 530022,China；Guangxi Meteorological Disaster Mitigation Institute,Nanning,Guangxi 530022,China | | YANG Xin | Remote Sensing Application and Validation Base of NSMC, Nanning,Guangxi 530022,China；Guangxi Meteorological Disaster Mitigation Institute,Nanning,Guangxi 530022,China | | SUN Han | Remote Sensing Application and Validation Base of NSMC, Nanning,Guangxi 530022,China；Guangxi Meteorological Disaster Mitigation Institute,Nanning,Guangxi 530022,China |
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| Abstract: |
| Land surface temperature and normalized different vegetation index derived from MODIS were used to establish vegetation condition index(VCI) model,temperature condition index(TCI) model and vegetation-temperature index(DI) model.Based on data from October to November in 2004,using correlation coefficients and R and CR,the reasonability of VCI,TCI and DI for drought monitoring in karst agriculture arid area and non-karst agriculture area in Guangxi was evaluated.The results showed that DI is the most promising method in monitoring drought for different geological environment in Guangxi;TCI has the potential on monitoring drought while VCI is not competent for monitoring drought in Guangxi.Using the DI,the temporal-spatial distribution of drought from September to November of 2005 in Guangxi was studied.The temporal-spatial pattern of DI was compared with the observed real drought condition in Guangxi.The validity of DI model in evaluating drought of different geological environment in Guangxi was verified. |
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