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http://dx.doi.org/10.12652/Ksce.2011.31.2B.087

Frequency Analysis of Meteorologic Drought Indices using Boundary Kernel Density Function  

Oh, Tae Suk (SK건설(주) Global Infra Marketing Team)
Moon, Young-Il (서울시립대학교 공과대학 토목공학과)
Kim, Seong Sil (서울시립대학교 공과대학 토목공학과 수자원연구실)
Park, Gu Sun (서울시립대학교 공과대학 토목공학과 수자원연구실)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.31, no.2B, 2011 , pp. 87-98 More about this Journal
Abstract
Recently, occurrence frequency of extreme events like flood and drought is increasing due to climate change by global warming. Especially, a drought is more severer than other hydrologic disasters because it causes continuous damage through long period. But, ironically, it is difficult to recognize the importance and seriousness of droughts because droughts occur for a long stretch of time unlike flood. So as to analyze occurrence of droughts and prepare a countermeasure, this study analyzed a meteorologic drought among many kinds of drought that it is closely related with precipitation. Palmer Drought Severity Index, Standard Precipitation and Effective Drought Index are computed using precipitation and temperature material observed by Korean Meteorological Administration. With the result of comparative analysis of computed drought indices, Effective Drought Index is selected to execute frequency analysis because it is accordant to past droughts and has advantage to compute daily indices. A Frequency analysis of Effective Drought Index was executed using boundary kernel density function. In the result of analysis, occurrence periods of spring showed about between 10 year and 20 year, it implies that droughts of spring are more frequent than other seasons. And severity and occurrence period of droughts varied in different regions as occurrence periods of the Youngnam region and the southern coast of Korea are relatively shorter than other regions.
Keywords
meteorologic drought index; Effective Drought Index; nonparametric frequency analysis; boundary kernel density function;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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