Fine sediment accumulates in channels post-wildfire then erodes by debris flow

Fine sediment accumulates in channels post-wildfire then erodes by debris flow

Repeat photograph of stream channel in the San Gabriel Mountains, California, showing accumulation of fine sediment following wildfire (left) and erosion of sediment in channel due to debris flows in the following winter (right).

Repeat photograph of a stream channel in the San Gabriel Mountains, California, showing accumulation of fine sediment following wildfire (left) and erosion of sediment in the channel due to debris flows the following winter (right). This pattern of loading and erosion can be identified by airborne laser mapping surveys and can help inform the location and magnitude of post-wildfire debris flow hazards.

IMAGE: Jeff Prancevic, University of California, Berkeley