Figure 2
(a) The topographic growth in the Himalayan wedge is controlled by the rock uplift and channel denudation in the hanging wall and the footwall elevation defines the base-level of the drainage system. (b) Formation and headword migration of slope break knickpoint in tectonically active terrain with reference to pre-perturbation equilibrated profile in response to the variation in uplift-erosion rates during transient state (after Jaiswara et al., 2019). (c) The reconstruction of paleo-base level of channels in the Dibang catchments using the scaling parameter Ks and mean concavity (θ) of relict reach. The blue and cyan lines show regressed and referenced concavity (θref), respectively. The reconstructed profile using slope-area analysis with 2σ elevation error and Chi (χ) profile clearly constrains the paleo-base level and the net surface uplift. Note the missing drainage divide peak in the Db-7.2 sub-catchment (Also see Fig. S3).
