Temporal and Spatial Variation and Influencing Factors of Water Storage on the Loess Plateau

In recent years，the conditions of the underlying surface of the Loess Plateau have changed greatly.We researched the changes of water storage by using multi-source data to further reveal the region’s water cycle process.GRACE data were used to study the temporal and spatial characteristics of Terrestrial Water Storage Changes (TWSC) in the Loess Plateau for 2003~2015 years，combined with the atmospheric circulation data，TRMM (3B43) precipitation，GLDAS evaporation and MODIS surface temperature data to analyze the impact of climate change and human activities on TWSC.The results shown that：①in the 2003~2015 years，the TWSC of Loess Plateau showed a decreasing trend with the rate of -5.16±1.51 mm/a，and the seasonal variation shown autumn＞winter＞summer＞spring.②in the past 13 years，the TWSC of Loess Plateau were decreasing from west to east，and the whole were in the state of loss，the minimum value was up to -4.5 cm.③Precipitation has a greater influence on the TWSC in the southwest and south of Loess Plateau，but the surface temperature plays dominated role in the southeast and east.④Human activities have a greater impact on TWSC in Shanxi province and the border zone of Shaanxi，Shanxi and Henan.The comparative study of multi-source data can more accurately reflect the spatial and temporal distribution of water storage changes in the region，and it also have great significant for further research of water cycle process.