Variation in the hydrological cycle in the Three-River Headwaters Region based on multi-source data

The hydrological processes in the Three-River Headwaters Region (TRHR), which is located Qinghai-Tibetan Plateau and includes Yangtze River Headwater (YARHR), Yellow (YERHR), Lantsang (LARHR), have changed under climate warming. Based on multi-source data, spatial temporal changes precipitation, evapotranspiration, soil water storage, glacier melt, snowmelt runoff from 1982 to 2014 were comprehensively analysed. annual precipitation data for ERA5-Land, Climatic Research Unit, China Meteorological Forcing Dataset Global Land Data Assimilation System (GLDAS) all showed an increasing trend; evapotranspiration System, Evaporation Amsterdam Model (GLEAM) Terrestrial Evapotranspiration across (TEDC) storage trend. SMT-Y datasets a decreasing melt increased decreased Region. increases content glacial decreases snowfall indicate accelerated cycle over period. significant increase main reason was less than sum of resulting trend slightly larger that there insignificant