Mathematical model of siltation in second navigation channel of Bangkok Port : final report / : submitted to Siam DHV Ltd. | |
| Author | Asian Institute of Technology. Water Resources Engineering Program |
| Call Number | AIT Research Report no. 282 |
| Subject(s) | Harbors--Bangkok Silt--Chao Phraya Estuary Sediment transport--Chao Phraya Estuary |
| Publisher | Asian Institute of Technology |
| Abstract | A mud transport and bed evolution model is developed to compute sediment transport in the . Chao Phraya Estuary and the siltation rate in the navigation channels. The model is based on the solution of the three-dimensional diffusion-convection equation. Interaction of tidal current and wave action is taken into account. The depth-averaged hydrodynamic model developed by . Vongvisessomjai and Charuskumchomkul (1989) is modified to incorporate open and moving boundaries and is applied to computed the depth-averaged tidal currents. The flow velocities in the vertical direction are computed based on the solution of the fluid-mass balance equation. The shallow water wave model developed by the US Coastal Engineering Research Center is used to compute the wave field. Three grid systems are used, namely, coarse grid, medium grid and fine grid. The fine grid systems are of L1x = L1y = 50 m covering an computation domain of 112 km2 • Measured data of water level and tidal current at station C and Pilot station are used for the calibration of the hydrodynamic model. Measured data of sediment concentration at station C, satellite image and measured siltation rate in the existing Bangkok Navigation Channel are used for the calibration of the mud transport and bed evolution model. From model calibration, it is found that the computed results of tidal current, water level, sediment concentration and siltation rate are in good agreement with the measured data. The model is applied to compute tidal current field, wav'e field, sediment distribution in the Chao Phraya Estuary, annual siltation rates along the Second Navigation Channel and the spreading of the dredged spoil of the second channel. |
| Year | 1994 |
| Type | Research Report |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |