Journal of Mountain Science

, Volume 14, Issue 11, pp 2284–2294 | Cite as

An improved temperature vegetation dryness index (iTVDI) and its applicability to drought monitoring

  • Ruo-wen Yang
  • Hai Wang
  • Jin-ming Hu
  • Jie CaoEmail author
  • Yu Yang


Using Moderate Resolution Imaging Spectroradiometer (MODIS) data from the dry season during 2010–2012 over the whole Yunnan Province, an improved temperature vegetation dryness index (iTVDI), in which a parabolic dry-edge equation replaces the traditional linear dry-edge equation, was developed, to reveal the regional drought regime in the dry season. After calculating the correlation coefficient, root-mean-square error, and standard deviation between the iTVDI and observed topsoil moisture at 10 and 20 cm for seven sites, the effectiveness of the new index in depicting topsoil moisture conditions was verified. The drought area indicated by iTVDI mapping was then compared with the drought-affected area reported by the local government. The results indicated that the iTVDI can monitor drought more accurately than the traditional TVDI during the dry season in Yunnan Province. Using iTVDI facilitates drought warning and irrigation scheduling, and the expectation is that this new index can be broadly applied in other areas.


Improved temperature vegetation dryness index (iTVDI) Drought monitoring Linear dry-edge equation Parabolic dry-edge equation Soil moisture 


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This work was supported by the National Key Research and Development Program of China (2016YFA0601601), National Natural Science Foundation of China (Grants Nos. U1502233, 41405001), the Jiangsu Collaborative Innovation Center for Climate Change and Ph.D. Programs Foundation of Ministry of Education of China (20135301120010).


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Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Department of Atmospheric SciencesYunnan UniversityKunmingChina
  2. 2.Yunnan Key Laboratory of International Rivers and Transboundary Eco-securityKunmingChina
  3. 3.Hubei Province Meteorological BureauWuhanChina

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