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http://dx.doi.org/10.3741/JKWRA.2016.49.1.41

Development and Application of Drought Index Based on Accumulative Pattern of Daily Rainfall  

Kwon, Minsung (Graduate School of Water Resources, Sungkyunkwan Univ.)
Park, Dong-Hyeok (Dept. of Civil and Environmental Engineering, Hanyang Univ.)
Jun, Kyung Soo (Graduate School of Water Resources, Sungkyunkwan Univ.)
Kim, Tae-Woong (Dept. of Civil and Environmental Engineering, Hanyang Univ.)
Publication Information
Journal of Korea Water Resources Association / v.49, no.1, 2016 , pp. 41-49 More about this Journal
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;
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Times Cited By KSCI : 1  (Citation Analysis)
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