Any river - estuary model (Shallow-water-wave equation) needs its downstream boundary condition which can be tidal forcing (Mike21, SRH-2D, TuFlow, HEC-Ras, CCEH2D...). When you set that it has its effect on the calculation of flow field (depth and velocity). So you flow filed is a function of upstream inflow of the river and downstream tidal fluctuation.

Any sediment transport model is using flow filed which is given by a hydrodynamic model to it, basically shear velocity and turbulence measures are used to calculate sediment deposition and erosion and rate of transport. Therefore if you set downstream tidal boundary condition in your hydrodynamic model and feed the results to sediment transport modulo of that model you incorporated the effect of tide on the sediment transport in that tidal river of interest.

Hope it helps,

Kaveh

The particle size grain size of the respective river and the density of this material should be included in the model to calculate the amount of material according to the amount of water during the tide.

Programs calculate what you ask them :)

Dear Rammahi,

Kaveh Zamani has presented you the best answer. I can add my article which shows the simulation of your question with SPH method based on experimental model of Hubert Chanson. I refer you to attached file.

Regards,

Thank you very much Kaveh Zamani , Teodora Hristova and Pooyan Nikeghbali for answers

M.Hassan Nasermoaddeli

[With all respect!] what I mentioned above was includes re-suspension. Driver of sediment transport (cohesive, non-cohesive) is shear velocity induced by velocity of flow. If he gets the "tidal flow" right the rest is similar. We do not use standalone formula for re-suspension, (Although some regression exists but no physical mass balance like Exner equation for re-suspension). In peaks of flood and ebb tide you have suspension and then you see deposition and maybe in the next flood or ebb tide you see suspension.

PS: I mostly seen the concept of re suspension under the umbrella of wave action not tide action. BTW the amount is very low and effect is usually local and more in the range which is used for geophysics and environmental science not engineers.