Abstract:
This thesis presents a study of the behavior of dry granular and driftwood flows on open check dams. The study was conducted in two parts: first, a physical experiment in the laboratory using dry granules with and without driftwood; and second, a study of dry granules using both physical and numerical modeling. Two open check dam patterns, V-shaped and Alpha-shaped, with internal angles of 80, 90, and 100 degrees, were studied to investigate their trapping efficiency and impact force reduction. The experiments were conducted on flume slopes of 25, 30, and 35 degrees, and included impact forces from material flow. To investigate the impact force after material flows through an open check dam in front, an experimental setup with a solid back check dam was used. The results show that Alpha-shaped open check dam with a 100- degree internal angle had the highest trapping and impact force reduction efficiency. Both the numerical and physical models showed that the Alpha-shaped open check dam had better traps and impact force reduction efficiency than the V-shaped open check dam. Increasing the internal angle of open check dams was found to increase the efficiency of open check dams