Analysis of Groundwater Storage Changes and Influencing Factors in China Based on GRACE Data

Groundwater is a primary freshwater resource for human consumption and an essential source industry agriculture. Therefore, understanding its spatial temporal trends drivers crucial governments to take appropriate measures manage water resources. This paper uses Gravity Recovery Climate Experiment (GRACE) satellite data the Global Land Data Assimilation System (GLDAS) derive groundwater storage anomalies (GWSAs) analyze of GWSA in different regions China (Xinjiang, Tibet, Inner Mongolia, North Plain, South China, Northeast China). It used groundwater-level observation verify accuracy estimates analyzed regional changes. The results showed that: (1) increased at rate 4.79 mm/a from 2003 2016, other decreasing trend. Among them, decline rates Xinjiang, were ?6.24 mm/a, ?3.33 ?3.17 ?7.35 ?0.75 respectively. (2) annual-scale was improved after deducting gravity losses due raw coal quality, correlation coefficient between levels monitored by wells increased. (3) In annual consumed mining, industrial, agricultural activities had greater impact on than rainfall temperature, so these might be main continued Xinjiang. Water mining Mongolia Plain. increase mainly recharge rainfall.