EFFICIENCY OF SEDIMENT SETTLING BASINS
Design of sediment settling basins requires evaluation of sediment removal efficiency over a range of sediment particle sizes. Past studies analysing sediment settling and basin efficiency has been limited to rectangular basins, assuming uniform conditions across the full width of the basin. In practice however, expansion and contraction of the flow in the basin inlet and outlet zones, respectively, means that this condition is not always met. A numerical model is presented that evaluates settling of sediment in a settling zone with variable width. This model was used to compare basin efficiency with and without taking into account the basin inlet and outlet zones. This comparison showed that, depending on the size of the sediment particles, there could be a significant reduction in basin performance of up to 35% due to the inlet and outlet zones. This result highlights the importance of ensuring that the inflow to and outflow from settling basins are evenly distributed across the full width of the basin.
sediment basins settling efficiency turbulence
Robert H.A.Janssen
Principal Hydraulic Engineer, Bechtel Chile Limitada, Coyancura 2283, Providencia, Santiago, Chile
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
2025-2030
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）