## Materials and Methods
### GRACE/GRACE-FO Derived TWS
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Name** & **Usage** & **Resolution** & **Period** & **Source** \\ \hline GFZ & TWSA & \(1^{\circ}\) & 2002–2019 & [[https://grace.jpl.nasa.gov/data/get-data/](https://grace.jpl.nasa.gov/data/get-data/)]([https://grace.jpl.nasa.gov/data/get-data/](https://grace.jpl.nasa.gov/data/get-data/)) (accessed on 11 July 2022) \\ CSR & TWSA & \(1^{\circ}\) & 2002–2019 & [[https://grace.jpl.nasa.gov/data/get-data/](https://grace.jpl.nasa.gov/data/get-data/)]([https://grace.jpl.nasa.gov/data/get-data/](https://grace.jpl.nasa.gov/data/get-data/)) (accessed on 11 July 2022) \\ JPL & TWSA & \(1^{\circ}\) & 2002–2019 & [[https://grace.jpl.nasa.gov/data/get-data/](https://grace.jpl.nasa.gov/data/get-data/)]([https://grace.jpl.nasa.gov/data/get-data/](https://grace.jpl.nasa.gov/data/get-data/)) (accessed on 11 July 2022) \\ CSR mascon & TWSA & 0.5\({}^{\circ}\) & 2002–2019 & [[https://grace.jpl.nasa.gov/data/get-data/](https://grace.jpl.nasa.gov/data/get-data/)]([https://grace.jpl.nasa.gov/data/get-data/](https://grace.jpl.nasa.gov/data/get-data/)) (accessed on 11 July 2022) \\ JPL mascon & TWSA & 0.5\({}^{\circ}\) & 2002–2019 & [[https://grace.jpl.nasa.gov/data/get-data/](https://grace.jpl.nasa.gov/data/get-data/)]([https://grace.jpl.nasa.gov/data/get-data/](https://grace.jpl.nasa.gov/data/get-data/)) (accessed on 11 July 2022) \\ JRC & SWE & monthly & 2008–2020 & JRC/GSW1\_2/GlobalSurfaceWater \\ GRAS & SWE & 12 day & 2017–2020 & DHI Company of Denmark \\ Jason-2 & WSE & 10 day & 2010–2016 & [[ftp://avisoftp.cnes.fr/AVISO/pub/](ftp://avisoftp.cnes.fr/AVISO/pub/)]([ftp://avisoftp.cnes.fr/AVISO/pub/](ftp://avisoftp.cnes.fr/AVISO/pub/)) (accessed on 11 July 2022) \\ Sentinel-3 A/B & WSE & 27 day & 2016–2019 & [[https://earth.esa.int/eogateway/missions/cryosat/data](https://earth.esa.int/eogateway/missions/cryosat/data)]([https://earth.esa.int/eogateway/missions/cryosat/data](https://earth.esa.int/eogateway/missions/cryosat/data)) (accessed on 11 July 2022) \\ Cryosat-2 & WSE & 369 day & 2010–2019 & [[https://scihub.copernicus.eu/dhus/](https://scihub.copernicus.eu/dhus/)]([https://scihub.copernicus.eu/dhus/](https://scihub.copernicus.eu/dhus/)) (accessed on 11 July 2022) \\ GLDAS 2.1 & SMS & 0.25\({}^{\circ}\) & 2002–2019 & [[https://disc.gsfc.nasa](https://disc.gsfc.nasa)]([https://disc.gsfc.nasa](https://disc.gsfc.nasa)) (accessed on 11 July 2022) \\ MERRA-2 & SMS & 0.65\({}^{\circ}\)\(\times\) 0.50\({}^{\circ}\) & 2002–2019 & [[https://disc.gsfc.nasa](https://disc.gsfc.nasa)]([https://disc.gsfc.nasa](https://disc.gsfc.nasa)) (accessed on 11 July 2022) \\ IMERG & Precipitation & 0.1\({}^{\circ}\) & 2002–2019 & [[https://gpm.nasa.gov/data/imerg](https://gpm.nasa.gov/data/imerg)]([https://gpm.nasa.gov/data/imerg](https://gpm.nasa.gov/data/imerg)) (accessed on 11 July 2022) \\ CMAGrid & Precipitation & 0.5\({}^{\circ}\) & 2002–2019 & [[http://data.cma.cn/](http://data.cma.cn/)]([http://data.cma.cn/](http://data.cma.cn/)) (accessed on 11 July 2022) \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Data used in this study. Abbreviations, TWSA: total water storage anomaly; SWE: surface water extend; WSE: water surface elevation; SMS: soil moisture storage. Figure 2: Research flow chart. Abbreviations, TWS: total water storage; SWE: surface water extend; WSE: water surface elevation; SMS: soil moisture storage; SWS: surface water storage; GWS: groundwater storage.