Figure 1

(a) The annual TRMM precipitation over the study region in eastern Himalaya and Tibet (http://www.geog.ucsb.edu/~bodo/TRMM/). (b) The drainage network in the eastern Himalaya-Tibet with major tectonic boundaries and knick point distribution. (c) The low relief landscape in the NW part of Dibang catchment, namely Db-7.2 and Db-6.2 (Also see Fig. SM1) (d) Longitudinal channel profiles in Dibang catchment with knickpoints and relict reach. Note the low relief Db-7.2 (orange color) has elevated thalweg. Knickpoint histogram show two prominent distributions at ~3000 m (3k) and ~1900 m. (e) The elevated low relief catchment in the Dibang has distinct morphometric characteristics. (IYSZ = Indus Yarlung Suture Zone, NB = Namcha Barwa, NLT = Nam La Thrust, STD = South Tibetan Detachment, MCT = Main Central Thrust, MBT = Main Boundary Thrust and MFT = Main Frontal Thrust).