Study on the Landform of Manas River Valley

The Manas River is the largest river in the north margin of the Tianshan Mountains.The uplift of the Tianshan Mountains has led to a series of arc and strike-slip faults in the area.The tectonic framework has been controlling and influencing the pattern and the evolutional process of landform.Based on the field measurement the Manas River geomorphology has been discussed.From south to north,the Manas River flows through five landform zones,which are mountains,fold hills and fans zone,plain and meander subsidence zones,Manas River tail zone.Different river landforms are figured by different landform zones.It is one of the regions that are characterized by active folds and faults with west and east trend.And the landform is controlled by active tectonics.So the piedmont of the Tianshan Mountains is steep in the northern limb and gentle in the southern limb.River terraces are deformed and dislocated by anticline and faults,and fans developed like a string of beads.