Article | . 2017 Vol. 29, Issue. 3
Spatial and Temporal Aspects of Drought in South Korea based on Standardized Precipitation Index (SPI) and Palmer Drought Severity Index (PDSI)

School of Environmental Science and Engineering, Southern University of Science and Technology1

2017.. 202:214


This study investigated the occurrence and intensity of drought in South Korea between 1951 and 2012, using two drought indices; Standardized Precipitation Index (SPI) and Palmer Drought Severity Index (PDSI). Spatial distributions of both drought indices over East Asia was examined to determine the possible association of drought occurrence in South Korea with its neighboring regions. Based on 3-month and 12-month SPI measured throughout the analysis period, drought occurs 34 and 14 times in South Korea. Drought frequency was significant at 8-10 months, and 2-3, 6-7, and 15 years for the 3-month and 12-month SPI, respectively, based on wavelet analysis. Drought events were also determined by PDSI and were similar to those evaluated by SPI before 2000; however, drought occurred more frequently after 2000. Across East Asia, 12-month SPI showed that the drought occurrence in South Korea was associated with the wet weather in the southern China, and based on PDSI, South Korea drought events were also associated with drought in central China. The difference between SPI and PDSI results indicates that multiple drought indices are necessary for better analysis and prediction of drought in South Korea.

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