| Title |
Analysis of Drought Propagation from Meteorological to Hydrological Drought Considering Spatio-temporal Moving Pattern of Drought Events |
| Authors |
유지영(Yoo, Jiyoung) ; 소병진(So, Byung-Jin) ; 이주헌(Lee, Joo-Heon) ; 김태웅(Kim, Tae-Woong) |
| DOI |
https://doi.org/10.12652/Ksce.2020.40.2.0135 |
| Keywords |
가뭄 전이;수문학적 가뭄;기상학적 가뭄;3차원 가뭄사상 Drought propagation;Hydrological drought;Meteorological drought;Three dimensional drought event |
| Abstract |
Natural drought is a three-dimensional phenomenon that simultaneously evolves in time and space. To evaluate the link between meteorological and hydrological droughts, we defined a drought event from a three-dimensional perspective and analyzed the propagation characteristics in time and spaces. Overall results indicated that 77 % of the total cases of spatio-temporal droughts was propagated based on the single category relationship between meteorological and hydrological drought events, while 23 % was affected by multiple meteorological drought events to the occurrence of hydrological drougts. Especially, it turned out that the hydrological drought was caused by the spatio-temporal effects of the propagation of four meteorological drought events generated due to long-term lack of precipitation in 1994-1995. In addition, the meteorological drought caused by the lack of precipitation in the summer of 2001 lasted for several months, and was propagated to the hydrological drought in April 2002. |