Research on the Hydrological Drought Characteristics in Yunnan Region Using GNSS Vertical Displacement
Abstract Using data from the China continental tectonic environment monitoring network, we obtain the vertical displacement data of 26 GNSS stations in Yunnan province from 2011 to 2019, and calculate the drought severity index based on GNSS vertical displacement (GNSS-DSI) to analyze hydrological drought events in Yunnan region. The results show that there is good correlation between GNSS-DSI and the drought severity index based on GRACE observations (GRACE-DSI), and 81% of the stations have a moderate-strong correlation between the two DSI data(0.45-0.78). GNSS-DSI can detect 7 moderate to extreme drought events in Yunnan from 2010 to 2019, and provide quantitative characterization of these hydrological drought events.
Key words :
GNSS vertical displacement
GRACE
hydrological drought
drought index
Cite this article:
ZHU Weigang,MA Dong,ZHENG Yu et al. Research on the Hydrological Drought Characteristics in Yunnan Region Using GNSS Vertical Displacement[J]. jgg, 2023, 43(3): 295-302.
ZHU Weigang,MA Dong,ZHENG Yu et al. Research on the Hydrological Drought Characteristics in Yunnan Region Using GNSS Vertical Displacement[J]. jgg, 2023, 43(3): 295-302.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2023/V43/I3/295
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