A New Estimation Method of Sediment Deposition in the Harbour Basin

By taking into account, the effect of upstream hydro-junction, a new estimated method of sedimentation amount in the Harbour basin was discussed. In the paper, the annual average sediment concentration and the median grain size were the key points to be considered. By the measured data, the ranges of the two key influencing factors were determined. The ranges of annual average sediment concentration and median grain size were 0.16 kg/m³ to 0.21 kg/m³ and 0.018 mm to 0.025 mm respectively. In the ranges of the two, combining with the results could be found that the theoretical value by the new method agreed with the value by the physical model test. This method was a sensible and valid method for calculation of the siltation in Harbour basin by taking into account the effect of the upstream hydrojunction. According to the theoretical value, the total sedimentation amount of Fueryan Wharf Phase II Project was not large. After the completion, the sedimentation intensity and the sedimentation amount of suspended sediment and bed load in Harbour basin were low. The same to Harbour basin, the sedimentation amount of the upstream and downstream of the Harbour basin were low. If only reserves certain depth for deposition, it can completely meet the requirements of navigation and Wharf working.