| Title |
A Study on Field Experiment and Numerical Modeling for Efficiency Analysis of Selective Withdrawal in Imha Reservoir |
| Authors |
김태원(Kim, Tae Won) ; 김영도(Kim, Young Do) ; 이용곤(Yi, Yong-Kon) |
| DOI |
https://doi.org/10.12652/Ksce.2012.32.2B.113 |
| Keywords |
선택취수;성층저수지;현장실험 selective withdrawal;stratified reservoir;field experiment;FLOW-3D;SELECT |
| Abstract |
When a heavy rain brings flooding, a high turbid water is flowing into a reservoir. In this study, the effectiveness of the intake structures for the selective withdrawal from the various levels of a stratified reservoir was evaluated by the field experiments and the numerical modeling of the three-dimensional approaching flows. The temperature, the turbidity, and the velocity fields for the selective withdrawal were measured using both YSI6600EDS and YSI6600ADV, respectively. A threedimensional model, FLOW-3D, was used to predict the performance of the intake tower in Imha reservoir. The comparisons of the vertical velocity field showed a good agreement with the field measurements. The efficiency of the turbid-water elimination of the selective withdrawal method from low levels was higher up to 46% than that of the surface withdrawal. From the analysis of the numerical simulation, the efficiency of turbidity elimination increased by 10% for the selective withdrawal from middle levels, and by 30% from low levels. These results showed that the selective withdrawals from middle and low levels are more effective than the surface-water intake. The similar results were obtained by the one-dimensional model, SELECT, which is much more computationally time-efficient. |