Figure 1. a) R (the rate of decay in remaining delta surface unreworked by the channel network), b) average number of channels, average over the second half of the run and counted along the arc of a semicircle with 2/3 of the delta’s area c) M (the rate of decay in channel planform overlap), d) shoreline roughness (measured as shoreline length divided by the square root of delta area). Panels are plotted against Q_w , withQ_s represented by increasingly dark shades of orange (for unvegetated deltas) and green (for vegetated deltas). In panel c, there is only one value of M and 2 values of Rfor the Q_w = 1000, Q_s = 2 vegetated condition (explanation found in Table 2 and Figure S1).