Author(s): M. A. Kabir; D. Dutta; S. Hironaka
Linked Author(s):
Keywords: Sediment dynamics; Process-based model; Transport capacity; Kinematic wave approximation; Abukuma River Basin
Abstract: This study has aimed to incorporate various widely used sediment transport capacity equations (TCEs) in a process-based sediment dynamic model, and to evaluate their relative performances in estimating suspended sediment dynamics at a river basin scale. The paper describes the modelling approaches and their application to a case study area (Abukuma River Basin, Japan). Analyses of the model performance using seven different TCEs based on data from two different flood events indicated that TCEs by Abrahams and Everaert were well-suited for use in the Abukuma River Basin as compared to the TCEs by Jayawardena, Govers, Low, Bagnold and Yalin. The paper elaborates various parameters used in the above-mentioned TCEs and their impacts on modelling outcomes. The results have demonstrated that the TCEs with more hydraulic parameters representing the flow and sediment transport processes have produced better outcomes. This will enable users of the process-based model to select the most suitable TCE for their applications.
Year: 2011