The general uplift of the Northeastern Tibetan Plateau (NTP) during the Neogene and Quaternary has led to drastic climate changes,for example several glacial advances in the Qilian Shan and the upper Huang He catchment during the Quaternary.Thus the river catchments in this region represent an ideal area for studying the impacts of the coupling of tectonics and climate changes on fluvial morphological development and the resulting sedimentary architecture of fluvial deposits.In this study,we use field observations and topographic data,combined with Optically Stimulated luminescence (OSL) dating,to determine the fluvial evolution in relation to climatic changes since the late Quaternary in the confluence area of Huang Shui and Huang He in the NETP.The sediment sequence of tenraces are composed of fluvial gravels of various thickness,interbedded with lenses of sands,and finally topped by a inter-bedded horizontally laminated silt (frequently occurring as reworking of soil material) and sands filling the shallow channels.Different thickness of Aeolian loess covered these sequences.Twenty samples from these different sediment parts are dated using sandy Quartz with single-aliquot regenerative (SAR)-OSL methods.