This research utilizes a quasi-two-dimensional sediment transport model to simulate the variations in sediment transport characteristics of the Nankan creek. By specifying a sediment-laden inflow to the study reach, we investigate the long-term and short-term hydraulical variations and the characteristics of sediment erosion and deposition in the vicinity of cross-channel structures, such as the weirs in the Nankan creek, under given peak-flood discharges and flood hydrographs at different recurrence intervals. It is our hope that this research can enable us to better understand the hydraulic variations and characteristics of sediment erosion and deposition in the upstream as well as downstream in a natural channel, and the morphological changes in channel bed after a weir is installed. The result can serve as recommendations to irrigation water management and flood control assessment.
