<p>Rock/rock-ice avalanches can be transformed into debris avalanches/flows in high mountain areas, causing catastrophic damages. The changes of propagation path significantly influence fragmentation, energy transfer, and deposition. In this study, a series of experiments are conducted to analyze the role of topography changes on the kinematics and dynamics behavior of granular flow. It is found that the curved degree of traveling path not only affected the velocity but also determined other dynamic behaviors, such as the flow states, energy dissipation, superelevation, runout distance, and deposition. When granular flow reaches the curved section, the collision between the particles and the concave bank of the flumes results in a deceleration effect. Some particles rush out from the flumes due to centrifugal force. As the curvature of the flume increases, the centrifugal force exerted on the debris particles intensifies. This heightened force results in a greater lateral outflow and deposition of the particles, subsequently leading to increased superelevation values. Additionally, some particles leap and fly out of the flumes after impacting the sidewall, transforming into an ultra-dilute flow. This phenomenon contributes to a transition from steady to unsteady flow. The dynamic process of granular flows within curved flumes can be categorized into six stages, all of which are well recorded in the seismic signals. Rapid flows can produce low-frequency signals, while strong collisions between the sliding mass and the bankslopes can produce high-frequency signals. This study offers valuable insights into the propagation and dynamic mechanisms of granular flows in complex topographical settings.</p>