Flow Characteristics at a River Diversion Juncture and Implications for Juvenile Salmon Entrainment

Flow structures at a river diversion juncture are complex and have been studied extensively. Their impact on the juvenile salmon entrainment into side channel, however, is less investigated, based mostly empiricism. In this study, Eulerian fish tracking model developed used in conjunction with 3D flow solver to quantitatively evaluate implications of characteristics typical junctures entrainment. First, validated available experimental data, key examined using results, their for discussed. Next, numerical show that cross-sectional distribution immediately upstream an important factor controls efficiency. Fish efficiency curves different ratios patterns shed light reasons behind some field-observed patterns. Further, secondary bend may significant junctures, agreement field observations. Finally, submerged vane demonstrated be potential management option locally generate flows achieve desired property.