Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Estimation of Proper EFDC Parameters to Improve the Reproductability of Thermal Stratification in Korea Reservoir

저수지 수온성층 해석능력 제고를 위한 적정 EFDC 매개변수 선정

  • Kim, Seon-Joo (Dam & Watershed Dept., K-Water) ;
  • Seo, Dong-Il (Department of Environmental Engineering, Chungnam National University) ;
  • Ahn, Ki-Hong (Department of monitoring & analysis, Nakdong River Basin Environmental Office, Ministry of Environment)
  • Received : 2011.03.17
  • Accepted : 2011.08.08
  • Published : 2011.09.30
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Abstract

In this study, a methodology was devised to overcome that difficulty for thermal stratification modeling using EFDC. For the increase of reproductability for thermal stratification analysis, the effect of parameter such as distribution of solar radiation, depth of active bed temperature layer, heat transfer coefficients were analyzed. The simulation period was from June to December in 2005 and statistical index is used to analyze the model results. The results showed that distribution of solar radiation is zero and depth of active bed temperature layer is 10 m are suitable for simulation of thermal stratification in Yongdam Dam reservoir. This study results can be used for guideline to analyze the thermal stratification of large dam reservoir in Korea.

본 연구에서는 대표적 3차원 수리 수질해석모형인 EFDC의 수온성층해석 능력 제고를 위해 적정 매개변수를 도출하고자 하였다. 이를 위해 태양복사 분포, 하상 초기온도, 활성 하상 수온층 깊이, 열전달계수 등 태양에너지와 관련된 5가지 매개변수에 대하여 용담호 수온성층해석 결과를 비교 분석하였다. 모의기간은 2005년 6월부터 12월까지였으며 수온 성층 재현성 수행 결과는 통계 지표인 AME, RMSE, $R^2$을 적용하여 비교하였다. 그 결과 IASWRAD는 하상으로 분포하는 경우, 활성 하상 수온층 깊이는 10m를 사용하는 것이 타당할 것으로 판단되었다. 본 연구에서 도출된 결과는 EFDC 모형의 수온성층모의시 적용 가이드라인으로 활용될 수 있을 것이다.

Keywords

References

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