부산대학교 도서관

In this study, the influence of climate variation on typhoon-induced rainfall and streamflow was analyzed across South Korea by applying Climate Influence Index (CII). The CII represents an increase of the severity of extreme hydrologic event through evaluating the Influence Intensity (II) and the Influence Frequency (IF). Among eight climate indices which were preliminarily investigated, Arctic Oscillation (AO) (in July) and West Pacific Pattern (WP) (in August and September) were selected in this study as appropriate climate indices based on correlation analysis. The influence of selected climate indices on the typhoon-induced rainfall and streamflow was evaluated in 113 sub-basins. Results show specific regional features in the variation of typhoon-induced rainfall and streamflow in July, August and September. Typhoon-induced rainfall and streamflow have a decrease influence in high phase and an increase influence in low phase. Also, the climate influence index is closely related with the correlation coefficient between typhoon-induced hydrologic extremes and climate indices.