Fig. 6

Plots showing the sensitivity of FlowDIR outputs to buffer length (a, d), uncertainty on starting coordinate (b, e) and DEM resolution (c, f) for a-c) the AED method and d-f) the LCP method. The AED method illustrates the relative probability of each direction bin with variable input parameters. For ease of interpretability we examined eight direction bins as opposed to the 16 calculated. The LCP method illustrates the azimuth of paths that intersect the buffer limit (i.e., paths from the starting coordinate out of the crater). The grey dashed lines in figures d-f show the limits of the 16 bins. Steeper lines at varying values indicate higher sensitivity