Environments in arid and semiarid regions are extremely sensitive to climate changes.However, because of the absence of relatively high-resolved proxies,there still poorly understanding for the past environmental changes in these regions.In this paper,we investigate the environmental evolutions based on the evidence of multiple proxies(including the particle size distributions,carbonate contents,geochemical elements, and AMS~(14)C dating results)from a nebkha that develops in the Huahai Basin,western Hexi Corridor, which has also been compared with meteorological observations,literature records,and desertification monitoring data.It indicates that the development of the nebkha is special in Huahai Basin.Although the continuously aeolian sedimentary sequence was disturbed by human activities between the mid-late 1960s and the early 1970s,it was then soon rebuilt and significantly enlarged due to the sufficient deposited material supply;and therefore,this nebkha sediments document high-resolution variations in regional environment condition.From the trends in contents of fine particles and carbonate as well as the values of Zr/Rb,there were sufficient sediment supply from the 1970s to the 1980s,and measured data indicated strong wind activities between 1970 and 1988,together with the rapid enlargement of the sampled nebkha.Afterwards,the ground surface was stable gradually and wind-energy regime changed to a large extent in this region.Above all,our results provide relatively high-resolution evidences on the variations in sediment availability and aeolian transport capability that occurred in this extremely arid area,which demonstrates the reliability of using nebkha sediments and proxies as indicators of past climatic and environmental changes.