accum_freeman = rd.FlowAccumulation(dem, method='Freeman', exponent=1.1)
rd.rdShow(accum_freeman, zxmin=450, zxmax=550, zymin=550, zymax=450, figsize=(8,5.5), axes=False, cmap='jet', vmin=d8_fig['vmin'], vmax=d8_fig['vmax'])