Experimental study on a debris flow drainage channel with different types of energy dissipation barriers

Debris flow breaker protects the downstream against the risk of these flows by water drainage and energy dissipation. It seems that structure changing in such a way that it reduces the kinetic energy of the debris, increases the efficiency of the structure. In this research, based on the dimensional analysis, some experiments were carried out in other to improve the structure performance of the stony debris flow breaker in a flume with slope adjustment capability. In these experiments, the efficiency of the debris flow breaker was studied with different barriers by changing in size, shape and arrangement under the different conditions of debris flow. Jagged and multiple barriers are selected to stop debris on the structure. Based on the results of jagged barriers, the different placements were able to increase the efficiency of debris flow breaker by up to 25%. In addition, two or three-row barriers even with their low height, have increased the structure control efficiency by 10%. Based on these results, a new and optimized structure was introduced.