| Title |
Hydrological Drought Analysis using Copula Theory |
| Authors |
곽재원(Kwak, Jae Won) ; 김덕길(Kim, Duck Gil) ; 이종소(Lee, Jong Soo) ; 김형수(Kim, Hung Soo) |
| DOI |
https://doi.org/10.12652/Ksce.2012.32.3B.161 |
| Keywords |
연속이론;수문학적 가뭄;가뭄 변수 run theory;hydrological drought;drought parameter;copula theory;Copula |
| Abstract |
Drought is a normal and recurrent phenomenon. But, recurring prolonged droughts have caused consequences and diverse impacts on human system. Therefore, understanding drought characteristics is indispensable element in well-prepared drought management. This study aims to investigate the hydrological droughts of Pyongchang stream and Upstream of Namhan-river in Korean peninsula. For modelling of the joint distribution of drought duration and drought severity, the copula method is used to construct the bivariate drought distribution and return period from the predetermined marginal distributions of drought duration and drought severity. As the result, the most severed drought of the Pyongchang stream and Upstream of Namhan-river occuring during period 1967 to 2007 is the 1981 and 1973. Return period for this drought derived from copula is 550 and 110 years. |