96 / 2025-04-24 12:55:59

An experimental study of the effects of classifying dredged dam sediments on their transport

This study investigates the effects of classifying dredged dam sediments on their transport
properties. Using a small recirculating flume, experiments were conducted to analyze the erosion
and breakdown of placed sediment models composed of silica sand, non-plastic silt, and kaolin.
Various mixing ratios were tested, focusing on the influence of fine content ratio (Fc) and clay
content ratio (Cc). Results indicate that the erosion resistance of placed sediment models is
significantly affected by the clay content ratio (Cc), with higher ratios leading to increased
resistance. Additionally, sediment classification and placement methods were explored, revealing
that horizontally layered configurations, with sand in the lower layer and clay in the upper layer,
increased erodibility. These findings suggest that proper classification and placement of dredged
dam sediments can enhance their transport and utilization downstream, addressing issues of
riverbed degradation and coastal erosion. Future research should focus on long-term sediment
consolidation and full-scale effectiveness evaluations.