Morpho-tectonic Analysis of the Bailongjiang Drainage Basin

Geomorphic indices have been widely used for studying relative active tectonics. The research about tectonic activity can be quantified with the development of mathematical models for river and stream-power incision model. Bailongjiang drainage system is located in the transition area between Tibetan Plateau and West Qinling Mountain. There is little research about this drainage basin on that whether it is in a steady-state or what is the difference about the activity. We carry out a study on the longitudinal profile of the 32 rivers,by fitting the characteristics of the river longitudinal profile using four function patterns,and analyzing the evolution process of the 32river's longitudinal profile based on the stream-power incision model. We can concluded that tectonic activity play an important role in this region's geomorphic indices and the upward-convex features of the profiles,the evolution phase of the river topographic form have not got to the steady state.