Numerical Investigation on the Hydraulics of River Lateral Intakes by SSIIM2 Software

In areas with sediment laden floodwater, sediments are carried into the intakes and decrease thechannel conveyance capacity. These sediments are settled at different locations, including theseparation zone at the upstream section of the lateral channel. Therefore, it is important to determinethe length and width of separation zone. In this study, hydraulics of the flow in an intake from arectangular channel using SSIIM2 is investigated. The ratio of intake width to main channel width,diversion angle, Froude number and ratio of diverted discharge on separation zone dimensions areamong the effective parameters in the hydraulics of intakes. These parameters were investigated andnumerical results were compared with those of experimental ones. There was a good agreementbetween the numerical and experimental results. For estimation of the above parameters severalequations were developed. k-3 turbulence model was also found to be suitable for intakes hydraulics.