Fig. 8

Spatial distribution of major ion concentrations (The figure was created using ArcGIS 10.2 software. The URL link is: https://desktop.arcgis.com/zh-cn/desktop/index.html).

Spatial distribution of major ion concentrations (The figure was created using ArcGIS 10.2 software. The URL link is: https://desktop.arcgis.com/zh-cn/desktop/index.html).