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http://dx.doi.org/10.14191/Atmos.2013.23.4.539

Standar Dization and Evaluation of PDSI Calculation Method for Korean Drought Management Agencies  

Bae, Deg-Hyo (Dept. of Civil and Environmental Eng., Sejong Univ.)
Sohn, Kyung-Hwan (Dept. of Civil and Environmental Eng., Sejong Univ.)
Kim, Hyun-Kyung (Korea Meteorological Administration)
Lee, Joo-Heon (Dept. of Civil Eng., Joongbu Univ.)
Lee, Dong-Ryul (Korea Institute of Construction Technology)
Ahn, Jae-Hyun (Dept. Urban Environmental System Eng., Seokeong Univ.)
Kim, Tae-Woong (Dept. of Civil and Environmental Eng., Hanyang Univ.)
Publication Information
Atmosphere / v.23, no.4, 2013 , pp. 539-547 More about this Journal
Abstract
The objective of this study is to standardize the calculation method of Palmer Drought Severity Index (PDSI) for the three Drought Management Agencies (DMA) in south Korea, and to evaluate the PDSI applicability. For comparison and review of the method, the code and input data of PDSI are collected from each DMA. The calculation method is the same, but the used input data (number of meteorological stations, normal year period, Available Water Capacity (AWC) of the soil) are different. Through discussions with drought experts and literature review, the standardized method is determined. 61 stations which have the data period more than 30 years are selected. Also the normal year is fixed for 30 years and updated every 10 years. The observed AWC is utilized using GIS data. Empirical equation of PDSI is re-estimated according to domestic climate characteristics. For evaluating the standardized PDSI, past drought events are investigated and drought indices including the existing SPI and PDSI are used for comparative analysis. As results, although the accuracy of standardized PDSI through ROC analysis is lower than SPI, the newly standardized PDSI is better than existing PDSI from DMA, Also it reasonably explain the spatial drought situation through the spatial analysis.
Keywords
DMA; standardized PDSI; input data; empirical equation; ROC; spatial analysis;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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