Figure 10

Spatial distribution of the HCO3- concentration in the research area from 2015 to 2019. Figure mainly describes the spatial concentration changes of HCO3− in the research area from 2015 to 2019. (a), (b), (c), (d), and (e) respectively represent the spatial concentration changes of HCO3− in the research area in 2015, 2016, 2017, 2018, and 2019. Figure was created using ArcGIS [10.2].