Abstract：Based on GRACE gravity satellite data, in this paper we adopt the improved combination Gaussian filtering method and scale factor method to improve data accuracy. The water storage changes of Guizhou from August 2003 to July 2013 are retrieved using the theory of terrestrial storage changes; the relative water storage index is calculated as the drought index. Meanwhile, drought duration and intensity are identified by Run theory, so as to monitor and analyze the drought characteristics of Guizhou. We found that the relative water storage index obtained from GRACE satellite data is basically consistent with the trend of SPI3. Besides, GRACE shows that drought events occurred in Guizhou every year from August 2003 to July 2013, with the shortest lasting for a month, and nine drought events lasting more than or equal to 3 months. Years with high drought intensity occurred in 2003-2006, 2009-2011. The loss of water storage in 2006 and 2011 were especially more serious, which is consistent with the actual drought situation in Guizhou for many years.
CHEN Fang,LIU Suihua,RUAN Ou et al. Monitor and Analyze the Drought Characteristics of Guizhou Based on GRACE Gravity Satellite Data[J]. jgg, 2021, 41(2): 201-205.
