In this study, analysing hydrological time series to detect evidence of climate change, the relationships between climatic variability and rainfall frequency, and the characteristics of drought and flood occurrence are investigated to assess climatic ...
In this study, analysing hydrological time series to detect evidence of climate change, the relationships between climatic variability and rainfall frequency, and the characteristics of drought and flood occurrence are investigated to assess climatic change impacts. the hydrological time series at the 11 stations with about 100 year records show apparent increase trend but there is no statistical significance at 95% level. However, the increase of drought and flood occurrence frequency is identified and the frequency amount estimated at same recurrence interval after the time series in 1950 year is larger than in year. In addition, when double 2CO₂concentration is anticipated, the results show that the severity of drought and flood may become more extreme than present condition. The study is also to examine the sensitivity of water resources system to climate change in the Geum River basin. To do that, we utilize temperature, precipitation, and streamflow for four(Base, Low, Average, and High) climate change scenarios using GCM. A reservoir simulation model for the Dae-Chung and Young-Dam dam in the basin has been developed with an objected-simulation environment. For each climate change scenario, the performance of the reservoirs is assessed in terms of reliability, resiliency, and vulnerability. Although the simulation results are heavily dependent on the choice of the climate change scenarios, the following conclusions can be clearly concluded : (1) the future streamflow above each dam tends to decrease during the dry season, which seriously increase competitive water use issues and (2) flood control issues predominate under the 2CO₂High scenarios.