기후변화에 따른 고삼저수지의 환경유량 영향평가
Assessment of Environmental Flow Impacts for the Gosam Reservoir According to Climate Change
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초록
This study conducted a quantitative assessment on the environmental flows associated with climate change in the Gosam Reservoir, Korea. Theapplication of RCP 8.5 climate change scenario has found that the peak value of High Flow Pulses has increased by 36.0 % on average compared tohistorical data (2001 ~ 2010), which is likely to cause disadvantage on flood control and management but the increase in peak value is expected to makea positive impact on resolving the issue of green algal blooms, promoting vegetation in surrounding areas and encouraging spawning and providinghabitats for native species by releasing a larger amount of landslides as well as organic matters than the past. However, the decreasing pattern of the peakvalue of High Flow Pulses is quite apparent with the trend of delay on the occurrence time of peak value, necessitating a long-term impact analysis. Thepeak value of Large Floods shows a clear sign of decrease against climate change scenario, which is expected to lead to changes in fish species causedby degraded quality of water and decreasing habitats. A quicker occurrence of Small Floods is also expected to make an impact on the growth cycle ofaquatic plants, and the reduction in occurrence frequency of Extreme Low Flows is to contribute to increasing the population of and raising the survivalrate of native fish, greatly improving the aquatic ecosystem. The results of this study are expected to be useful to establish the water environment andecological system in adapting or responding to climate change.
Abstract
This study conducted a quantitative assessment on the environmental flows associated with climate change in the Gosam Reservoir, Korea. Theapplication of RCP 8.5 climate change scenario has found that the peak value of High Flow Pulses has increased by 36.0 % on average compared tohistorical data (2001 ~ 2010), which is likely to cause disadvantage on flood control and management but the increase in peak value is expected to makea positive impact on resolving the issue of green algal blooms, promoting vegetation in surrounding areas and encouraging spawning and providinghabitats for native species by releasing a larger amount of landslides as well as organic matters than the past. However, the decreasing pattern of the peakvalue of High Flow Pulses is quite apparent with the trend of delay on the occurrence time of peak value, necessitating a long-term impact analysis. Thepeak value of Large Floods shows a clear sign of decrease against climate change scenario, which is expected to lead to changes in fish species causedby degraded quality of water and decreasing habitats. A quicker occurrence of Small Floods is also expected to make an impact on the growth cycle ofaquatic plants, and the reduction in occurrence frequency of Extreme Low Flows is to contribute to increasing the population of and raising the survivalrate of native fish, greatly improving the aquatic ecosystem. The results of this study are expected to be useful to establish the water environment andecological system in adapting or responding to climate change.
참고문헌 (21)
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