## 2 Materials and Methods
### Study Area and Data Sources
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Data** & **Data Resolution** & **Data Source** & **Data Usage** \\ \hline \multirow{3}{*}{Land use/cover type of Sichuan Province in 2018} & \multirow{3}{*}{1000 m \(\times\) 1000 m} & Resource and Environment Science & \multirow{3}{*}{ESV calculation} \\  & & and Data Center & \\  & Province in 2018 & & ([[https://www.resdc.cn/](https://www.resdc.cn/)]([https://www.resdc.cn/](https://www.resdc.cn/)), (accessed on 4 April 2021)) & \\ \hline \multirow{3}{*}{Grain crop yield, grain planting area, and grain price in Sichuan Province in 2018} & \multirow{3}{*}{-} & Sichuan Statistical Yearbook & \multirow{3}{*}{ESV calculation} \\  & & National compilation of & \\  & & cost-benefit data of agricultural & \\  & & products & \\ \hline \multirow{3}{*}{Average precipitation in different meteorological stations in Sichuan Province in 2018} & \multirow{3}{*}{-} & Resource and Environment Science & \multirow{3}{*}{Quantification of ESs; ESV} \\  & & and Data Center & \\  & & ([[https://www.resdc.cn/](https://www.resdc.cn/)]([https://www.resdc.cn/](https://www.resdc.cn/)), (accessed on 13 May 2021)) & \\ \hline \multirow{3}{*}{Global drought and potential evapotranspiration} & \multirow{3}{*}{1000 m \(\times\) 1000 m} & The Global Aridity Index and & \multirow{3}{*}{\begin{tabular}{} \end{tabular} } \\  & & Global Reference & \\  & Evapotranspiration dataset & & \\  & & ([[https://www.fugshare.com/articles/dataset/](https://www.fugshare.com/articles/dataset/)]([https://www.fugshare.com/articles/dataset/](https://www.fugshare.com/articles/dataset/)) & \\  & & Global\_Aridity\_Index\_and\_ & \\  & & Potential\_Evapotranspiration\_ET0 & \\  & & Climate\_Database\_v2/7504448/3, & \\  & & (accessed on 24 July 2020)) & \\ \hline \multirow{3}{*}{Soil sand, silt, clay, organic matter content, and soil bulk density} & \multirow{3}{*}{1:100,000,000} & Harmonized World Soil Database & \multirow{3}{*}{\begin{tabular}{} \end{tabular} } \\  & & The second National soil Survey & \\  & & ([[http://westdc.vevevegsis.ac.cn/](http://westdc.vevevegsis.ac.cn/)]([http://westdc.vevevegsis.ac.cn/](http://westdc.vevevegsis.ac.cn/)) & \\  & & data/6117/d50-b419-d414-b4 dd- & \\  & & 4a944b14175, (accessed on & \\  & & 25 June 2020)) & \\ \hline \multirow{3}{*}{Spatial distribution of watersheds in China} & \multirow{3}{*}{-} & Resource and Environment Science & \multirow{3}{*}{\begin{tabular}{} \end{tabular} } \\  & & and Data Center & \\  & & ([[https://www.resdc.cn/](https://www.resdc.cn/)]([https://www.resdc.cn/](https://www.resdc.cn/)), (accessed on 12 July 2021)) & \\ \hline \multirow{3}{*}{Digital Elevation Model (DEM) of Sichuan Province in 2018} & \multirow{3}{*}{30 m \(\times\) 30 m} & Geographical Information & \multirow{3}{*}{\begin{tabular}{} \end{tabular} } \\  & & Monitoring Cloud Platform & \\  & & ([[http://www.dsac.cn](http://www.dsac.cn)]([http://www.dsac.cn](http://www.dsac.cn)), (accessed on & \\  & & 4 April 2021)) & \\ \hline \multirow{3}{*}{Normalized vegetation Index (NDVI) of Sichuan Province in 2018} & \multirow{3}{*}{30 m \(\times\) 30 m} & Geospatial Data Cloud & \multirow{3}{*}{\
\begin{tabular}{} \end{tabular} } \\  & & ([[http://www.gscloud.cn/](http://www.gscloud.cn/)]([http://www.gscloud.cn/](http://www.gscloud.cn/)), & \\  & & (accessed on 20 April 2021)) & \\ \hline \multirow{3}{*}{Net Primary Productivity (NPP) of Sichuan Province in 2018} & \multirow{3}{*}{500 m \(\times\) 500 m} & National Earth System Science Data & \multirow{3}{*}{
\begin{tabular}{} \end{tabular} } \\  & & Center & \\ \cline{1-1}  & & ([[http://gre.geodata.cn/](http://gre.geodata.cn/)]([http://gre.geodata.cn/](http://gre.geodata.cn/)), (accessed on 8 August 2021)) & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Basic data required for research.