CE 704 · Chapter 5
Hydropower Engineering past question
5.4 Sediment Handling measures: Methods of bed load and suspended load handling in RoR headworks, Design of settling basin (Particle and concentration approach), Estimation of sediment volume in Settling basin, Flushing of deposited sediment, estimation of frequency of flushing
Design a desander using the following data: Discharge=16 m³/s, particle size to be settled ≥0.2 mm, particle fall velocity=0.022 m/s, horizontal flow velocity=0.2 m/s. Consider two basins with a factor of safety for basin area of 1.5. Use length-to-breadth ratio of 6. Assume a sediment concentration of 1 kg/m³, a sediment particle density of 2650 kg/m³, a settling time of 1 day, a sediment packing factor of 0.5, and an additional 10% discharge for flushing. [7]