Figure 8. Representative examples of multi-stage tributary response in Cases 3 (a) & 4 (b). Note, upstream positions always experience relatively longer initial adjustment stages than downstream positions, regardless of rainfall gradient. Grey shaded and white regions show where initial and final steady states (SS) and different adjustment stages are represented along the profile lengths, as indicated across top axis. a) Shows a tributary located in a relatively downstream position, 15 km from trunk outlet and downstream fromxsc after 300 kyr of transient adjustment in Case 3, where the initial adjustment stage is relatively short-lived. Despite this, protracted adjustment creates a several-kilometer-wide adjustment zone with relatively smooth but notable along-stream variations inksn . This pattern is subtle on the longitudinal profile. b) Shows a tributary located in an upstream position, 45 km from the trunk outlet and upstream from xsc after 1.725 Myr of transient adjustment in Case 4, where the initial adjustment stage is long-lived. The initial adjustment stage reshapes the entire profile prior to adjustment of the trunk profile, but no transient knickpoints or other obvious topographic indicators of such significant modification are present, with smoothly varying localksn values within 10% of the mean. Also, note overadjustment means that the increase in channel steepness required to reach steady state contrasts with net reduction in channel steepness during transient adjustment.