Scott Weston and I rented wetsuits and swam down Norrish Creek's lower canyon, between the two stream gauges. Although it was a fun trip the research goal was to identify sediment sources in the lower canyon and to determine if the lower canyon is subject to debris flows or if debris flows from the steep walls and tributary creeks deposit in the main channel. Based on our observations it seems that the latter option is the case, although debris flows from Sally Creek might reach the apex of the fan, below the canyon, on rare occasions.
