Journal of Integrative Agriculture ›› 2016, Vol. 15 ›› Issue (9): 2132-2141.DOI: 10.1016/S2095-3119(15)61257-6

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  • 收稿日期:2015-07-02 出版日期:2016-09-02 发布日期:2016-09-02

A modified vegetation water supply index (MVWSI) and its application in drought monitoring over Sichuan and Chongqing, China

WU Men-xin, LU Hou-quan   

  1. National Meteorological Center, China Meteorological Administration, Beijing 100081, P.R.China
  • Received:2015-07-02 Online:2016-09-02 Published:2016-09-02
  • Contact: LU Hou-quan, Tel: +86-10-68407339, E-mail: lvhq@cma.gov.cn
  • About author:WU Men-xin, Tel: +86-10-68409654, E-mail: wumx@cma.gov.cn;
  • Supported by:

    The study was jointly supported by the National Basic Research Program of China (2013CB430205) and the National Key Technologies R&D Program of China during the 12th Five-Year Plan period (2011BAD32B01).

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Abstract: Based on the principle of vegetation water supply index (VWSI), relative normalized difference vegetation index (RNDVI) and relative land surface temperature (RLST) are proposed, with which a modified vegetation water supply index (MVWSI) is constructed, i.e., . Compared with VWSI, MVWSI eliminates the difference caused by the spatial and temporal distribution of VWSI. MVWSI was applied to monitor drought over Sichuan and Chongqing, China in 2006, suggesting that MVWSI can demonstrate the whole process of drought from its emergence and development to its weakening and disappearance. The relative precipitation index (RPI) is used to examine the effectiveness of MVWSI. The examination result shows that MVWSI and RPI have high consistency in spatial distribution and in-site time series analysis. Compared with vegetation condition index (VCI), temperature condition index (TCI), vegetation temperature condition index (VTCI) and temperature vegetation drought index (TVDI), MVWSI is simpler in calculation and more stable hence more easily realized in application.

Key words: MVWSI ,  drought ,  NDVI ,  LST