Abstract—Sediment and flow dynamics in a sand trap of
Golen Gol hydropower project in Pakistan was evaluated using a
Computational Fluid Dynamics (CFD) model. Sediment
Simulation in Intakes with Multi Block Options (SSIIM) CFD
model was used to simulate the sediment and flow behavior in the
sand trap. Numerical simulation results demonstrated that the
horizontal and vertical component of velocities at any region of
settling basin was less than the designed critical flow velocity of
the sand trap. The design with respect to dimensions and
proportioning of the sand trap were found appropriate for
inducing low flow velocities throughout the settling basin of the
sand trap supporting the deposition of sediments. The results
obtained from simulation further presented the 100% removal of
the desired sediments (particle size class ≥ 0.205 mm diameter)
could be achieved in the sand trap. All this verify the design of
sand trap is in accordance with the desired designed sediment
removal efficiency of the sand trap.