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The climatic factors have great influence on spring runoff which is dominated by snowmelt in alpine watersheds.Climate change can influence the occurring time and the magnitude of the spring snowmelt peak flow.In Xinjiang,northwestern of China,the observation stations are sparse,and most of them are located in low elevation.However,most of the water resources of the arid areas are from the mountain areas in high elevation.The lack of the observation stations makes the study of the hydrological process difficult.