Bedrock Erosion by Debris Flows at Chalk Cliffs, Colorado, USA: Implications for Bedrock Channel Evolution

Debris flow erosion into bedrock helps to set the pace of mountain denudation, but there are few empirical observations this process. We studied effects debris flows on using Structure-From-Motion photogrammetry and multiple real-time monitoring measurements. found that distribution across channel cross-section could be generalized as an exponentially decreasing function height above thalweg. Using function, we simulated at a after theoretical passage migrating knickpoint effectively matching upstream pre-knickpoint cross-sectional shape downstream post-knickpoint via debris-flow erosion.