Evaluation of Hydraulic Condition in Canoe-fishway Using Flow-3D Modeling

Since the fishway serves important roles in fish migration and survival, they are the main components of river cross structures like dams. In this study, the numerical modeling of Canoe-fishways was conducted using Flow-3D software. For verification, it was used as the results of experimental modeling. By comparing numerical results with experimental model, it was found that the error rates for the depth and velocity of flow were 3 and 11.5%, respectively. Then, using numerical models, the velocity of flow was shown in different directions for optimization discharges, a low-velocity area in pools was found after each brush was formed which was the best place for resting of migratory fishes. Providing the amount of turbulence in different parts of the canal, it was determined that the maximum turbulence occurred in the canal slot. The maximum velocity occurred in slot and in pool front slot. It was also found that velocity and turbulence in different parts of the canal were within the allowable range.