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http://dx.doi.org/10.3741/JKWRA.2012.45.4.409

Development of a Modified Standardized Precipitation Index by Considering Effects of the Dry Period and Rainfall  

Lee, Jun-Won (Department of Architecture and Civil Engrg., Kyungbook National Univ.)
Kim, Gwang-Seob (Department of Architecture and Civil Engrg., Kyungbook National Univ.)
Publication Information
Journal of Korea Water Resources Association / v.45, no.4, 2012 , pp. 409-418 More about this Journal
Abstract
A modified standardized precipitation index was developed by considering the length of dry period and surface run-off effect. The official reports and newspapers on drought from 1973 to 2009 were quantified to evaluate drought indices. The developed index was evaluated using the receiver operating characteristic analysis. In order to suggest improved drought index, we cut the precipitation amount that may do not contribute the mitigation of drought and weight dry period by considering cumulative distribution, decile distribution of dry periods. Drought detection capability of the suggested index has improved by weighting of dry period effects and considering precipitation amounts contributing drought mitigation.
Keywords
drought index; SPI; MSPI; ROC; dry period;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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