| Title |
Reproducibility Evaluation of Stratification Using EFDC Model in Nakdong River |
| Authors |
최현구(Choi, Hyun Gu) ; 한건연(Han, Kun Yeun) ; 박준형(Park, Jun Hyung) |
| DOI |
https://doi.org/10.12652/Ksce.2017.37.3.0561 |
| Keywords |
성층현상;재현성 평가;수온;낙동강 Stratification;Reproducibility evaluation;Water temperature;DO;Nakdong river |
| Abstract |
Nakdong River was recently dredged with multi-functional weirs construction. Therefore, the depth was deepened and the lag time also increased. As a result, stratification occurred in some sections with deep water depth, and it also caused the increase of algal bloom phenomenon. The purpose of this study is to evaluate reproducibility of stratification in the Nakdong River by applying the EFDC model, which is a three-dimensional hydraulic and water quality analysis model proving the reproducibility of stratification phenomena in reservoirs and estuaries. In order to reproduce the Nakdong river water temperature and DO stratification, EFDC model was constructed in the downstream part of the Nakdong river and sensitivity analysis was performed on key parameters sensitive to stratification. Sensitivity analysis was used to reproduce stratification by selecting optimal parameters. The results of this study can be used as basic data for the analysis of various destratification scenarios. |