| Title |
Application of Depth-averaged 2-D Numerical Model for the Evaluation of Hydraulic Effects in River with the Riparian Forest |
| Keywords |
riparian forest;drag force;hydraulic effect;2-d numerical model;FESWMS FST2DH;하안림;항력;수리학적 영향;2차원 수치모형 |
| Abstract |
In this study, FESWMS FST2DH model was used to analyze the change of flow characteristics after making the riparian forest. The additional flow resistance is calculated based on the drag-force concept acting on each tree and the lateral momentum transfer between planted and non-planted zone could be satisfactorily reproduced by parabolic turbulence model in this depth-averaged 2-D numerical model. For model validation, the simulated velocities were compared with the measured data, showing good agreement in both tree density cases of experiments. The previous method using a proper Manning"s n coefficient gives reasonable solutions only to evaluate the conveyance, but the calculated approach velocity at each tree was different from realistic value. The proposed procedure could be widely used to evaluate hydraulic effects of riparian trees in practical engineering. |