Effect of multiple debris flow countermeasures on flow characteristics and topographic changes through real-scale experiment

In this study, to investigate the effect of multiple countermeasure on flow characteristics debris flows, a real-scale experiment was conducted in natural gully by reproducing with installation countermeasures. addition, topographic changes before and after were investigated using UAV-LiDAR. Based results, countermeasures against erosion deposition caused also analyzed. The significantly decreased frontal velocity flow. Furthermore, induced material back countermeasure.