Affiliation:
1. School of Environment, Key Laboratory of Water and Sediment Sciences of MOE Beijing Normal University Beijing China
2. Marine Support and Channel Technology Research Center China Waterborne Transport Research Institute Beijing China
Abstract
AbstractThe transportation of bank‐collapsed materials is a key issue among river evolution processes. In this study, a series of flume experiments were conducted to monitor riverbank collapse processes and to explore the regularity of transportation for cohesive collapsed materials in the straight channel adapting to climate change conditions. The collapsed materials, both the bed and suspended loads, that transformed from collapsed materials were intensively evaluated under experimental conditions. The results showed that the collapsed materials contributed to 12% ˜ 20% sedimentation in situ, 8% ˜ 14% suspended loads and 70% ˜ 80% bed loads. In addition, the bed load motion efficiency coefficient (eb), suspended load motion efficiency coefficient (es) and sediment carrying capacity factor (U3/gRω) were introduced to describe the transportation of collapsed materials in terms of energy dissipation. This research provides theoretical and practical benefits for predicting channel evolution processes.
Funder
National Natural Science Foundation of China