We attempt a compromise in area-descriptiveness space by lumping landslide source areas and resolving the channel network at high resolution. Channel source basins and channel-adjacent areas form aggregates. In each aggregate, areas with similar landslide susceptibility are binned, and average values of, e.g., soil depth, etc., are stored for each bin. In simulations, h set to 5 cm, then 6000 yrs. of evolution. Landslide susceptibility is not significantly different for stands older than 40 yrs.
Values are rough guesses.
Simulation boundary conditions mimic those of the debris flow flume at the H.J. Andrews Experimental Forest in Oregon. Simulations show the sensitivity of runout length to wood content of both the initial flow and deposits in the flow's path. Greater initial wood content results in shorter runout. Greater deposit wood content also results in shorter runout such that enough wood actually stops the flow before it reaches the bottom of the ramp. Porosity is 0.3.