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Development and Application of Drought Index Based on Accumulative Pattern of Daily Rainfall
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 Title & Authors
Development and Application of Drought Index Based on Accumulative Pattern of Daily Rainfall
Kwon, Minsung; Park, Dong-Hyeok; Jun, Kyung Soo; Kim, Tae-Woong;
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 Abstract
This study proposed a new drought index considering the accumulative pattern of daily rainfall, i.e., Rainfall Accumulation Drought Index (RADI). The RADI can be easily calculated at daily scale by comparing the long-term averaged cumulative rainfall to the observed cumulative rainfall for a specific duration. This study evaluated the availability of the RADI in the field of monitoring short-term and long-term droughts by investigating the spatial and temporal variability and the recurrence cycle of drought in South Korea. To present the short-term and long-term droughts, the various SPIs with different durations should be used in practice. However, the RADI can present and monitor both short-term and long-term droughts as a single index. By investigating the national average of the RADI, specific drought patterns of 20-year cycle were identified in this study. This study also proposed a five-level drought classification considering occurrence probability that would be a suitable alternative as a drought criterion for drought forecast/response.
 Keywords
accumulative pattern;daily rainfall;drought index;
 Language
Korean
 Cited by
 References
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