2025 年 13 巻 2 号 論文ID: 24-16129
The present study discusses sediment transport processes in the drainage basin of the Kelani River using the RSR model which is able to evaluate bedload and suspended load and their sediment size distribution at any cross-sections of stream channels. This model was applied to the 2016 and 2018 flood events to investigate temporal and spatial characteristics of sediment transportation. Simulated results show that the accumulated bedload volumes are comparable to the accumulated suspended load in these flood events. Besides, they show that the material of the suspended and bedload tend to mix in the peak flood stage, and the field data on the upstream and downstream sediment size distribution are similar to those of bedload and suspended sediment, respectively.
