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http://dx.doi.org/10.3741/JKWRA.2013.46.2.195

Development on Classification Standard of Drought Severity  

Kwon, Jinjoo (Dept. Urban Environment System Eng., Seokeong Univ.)
Ahn, Jaehyun (Department of Civil & Architectural Eng., Seokeong Univ.)
Kim, Taewoong (Dept. of Civil and Environmental Eng., Hanyang Univ.)
Publication Information
Journal of Korea Water Resources Association / v.46, no.2, 2013 , pp. 195-204 More about this Journal
Abstract
As drought is phenomenon of nature with unavoidability and repeated characteristic, it is necessary to plan to respond to it in advance and construct drought management system to minimize its damage. This study suggested standard for classification of drought, which is appropriate for our nation to respond to drought by assessing drought severity in the regions for this study. For data collection, 61 locations were selected - the locations keep precipitation data over 30 years of observation. And data for monthly precipitation for 37 years from 1973 were used. Based on this, this study classified unified drought interval into four levels using drought situation phases which are used in government. For standard for classification of drought severity fit to our nation, status of main drought was referred and these are classified based on accumulated probability of drought - 98~100% Exceptional Drought, 94~98% Extreme Drought, 90~94% Severe Drought, 86~90% Moderate Drought. Drought index (SPI, PDSI) was made in descending order and quantitative value of drought index fit to standard of classification for drought severity was calculated. To compare classification results of drought severity of SPI and PDSI with actual drought, comparison by year and month unit were analyzed. As a result, in comparison by year and comparison by month unit of SPI, drought index of each location was mostly identical each other between actual records and analyzed value. But in comparison by month unit of PDSI for same period, actual records did not correspond to analyzed values. This means that further study about mutual supplement for these indexes is necessary.
Keywords
Drought; Drought Index; Drought Severity; SPI; PDSI; Fuzzy TOPSIS;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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