| Title |
Application of SAD Curves in Assessing Climate-change Impacts on Spatio-temporal Characteristics of Extreme Drought Events |
| Keywords |
climate change;drought;drought severity-area-duration curve;regional climate models;standardized precipitation index;기후변화;가뭄;가뭄심도-지속기간-면적 곡선;지역기후모형;표준강수지수 |
| Abstract |
In this study, the impact of climate change on extreme drought events is investigated by comparing drought severity-area-duration curves under present and future climate. The depth-area-duration analysis for characterizing an extreme precipitation event provides a basis for analysing drought events when storm depth is replaced by an appropriate measure of drought severity. In our climate-change impact experiments, the future monthly precipitation time series is based on a KMA regional climate model which has a 27㎞×27㎞ spatial resolution, and the drought severity is computed using the standardized precipitation index. As a result, agricultural drought risk is likely to increase especially in short duration, while hydrologic drought risk will greatly increase in all durations. Such results indicate that a climate change vulnerability assessment for present water resources supply system is urgent. |