| Title |
Comparison of Meteorological Drought Indices Using Past Drought Cases of Taebaek and Sokcho |
| Authors |
강동호(Kang, Dong Ho) ; 남동호(Nam, Dong Ho) ; 김병식(Kim, Byung Sik) |
| DOI |
https://doi.org/10.12652/Ksce.2019.39.6.0735 |
| Keywords |
기상학적 가뭄지수 Meteorological drought index;SPI;CZI;MCZI;ZSI |
| Abstract |
Drought is a social phenomenon in which the degree of perception varies depending on the affected factors, and is defined as various relative concepts such as meteorological drought, hydrological drought, agricultural drought, and climatological drought. In this study, a comparative analysis of meteorological drought among variously defined droughts was conducted and the applicability of the drought index was examined by comparing the actual drought cases and the results of meteorological drought index analysis. In order to compare the drought index, we used standardized Precipitation Index (SPI), China-Z Index (CZI), Modified CZI (MCZI) and Z-Score Index Respectively. Four drought indices were used for the Taebaek and Sokcho areas. The drought index was analyzed using the meteorological data from 1986 to 2015 for a duration of 3 months. As a result of the analysis, the SPI drought index was analyzed to be highly reproducible for the case of drought with past limited water series. In the case of CZI and MCZI drought indices, the number of extreme dry occurrences is similar to that of the past cases, but the reproducibility is low for the actual drought years. In the case of ZSI drought index, it is analyzed that the number of occurrences and the comparison with the past cases are inferior in reproducibility. For the meteorological drought index using precipitation, it would be effective to use the SPI drought index with the highest reproducibility and the past drought case. |